CS6611 Mobile Application Development Lab Manual-2018-19

Mobile Application Development Lab Manual

1. Builders Engineering College






LAB MANUAL




Subject Code : CS6611
Subject Name : MOBILE APPLICATION DEVELOPMENT
LABORATORY
Year : III
Sem : VI







Prepared by
Mr. S. GOBINATH, AP/CSE

2. Builders Engineering College CS6611- MOBILE APPLICATION DEVELOPMENT LABORATORY L T P C

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OBJECTIVES:
The student should be made to:
• Know the components and structure of mobile application development frameworks
for Android and windows OS based mobiles.
• Understand how to work with various mobile application development frameworks.
• Learn the basic and important design concepts and issues of development of mobile
applications.
• Understand the capabilities and limitations of mobile devices.

LIST OF EXPERIMENTS:
1. Develop an application that uses GUI components, Font and Colours.
2. Develop an application that uses Layout Managers and event listeners.
3. Develop a native calculator application.
4. Write an application that draws basic graphical primitives on the screen.
5. Develop an application that makes use of database.
6. Develop an application that makes use of RSS Feed.
7. Implement an application that implements Multi threading.
8. Develop a native application that uses GPS location information.
9. Implement an application that writes data to the SD card.
10. Implement an application that creates an alert upon receiving a message.
11. Write a mobile application that creates alarm clock.

TOTAL: 45
PERIODS
OUTCOMES:
At the end of the course, the student should be able to:
• Design and Implement various mobile applications using emulators.
• Deploy applications to hand-held devices.

LIST OF EQUIPMENT FOR A BATCH OF 30 STUDENTS
Standalone desktops with Windows or Android or iOS or Equivalent Mobile Application
Development Tools with appropriate emulators and debuggers – 30 Nos.

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Ex.No: 1 Develop an application that uses GUI components, Font and Colours
Date:

Aim:
To develop an android application that uses GUI components, Font and Colours
using android studio.

Procedure:
1. Open eclipse or android studio and select new android project.
2. Give project name and select next.
3. Choose the android version. Choose the lowest android version(Android 2.2) and
select next.
4. Enter the package name. Package name must be two word separated by comma and
click finish.
5. Go to package explorer in the left hand side. Select the project.
6. Go to “res“ folder and select layout. Double click the activitymain.xml file.
7. Now you can see the Graphics layout window.
8. Click the activitymain.xml file and type the code.
9. Go to project explorer and select “src” folder. Now select mainactivity.java file
and type the code.
10. Go to activitymain.xml and right click. Select run as option and select run
configuration.
11. Android output is present in the android emulator.
Program: activitymain.xml
<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="helloapp.example.com.demoapp.MainActivity"
android:background="#03acda"
android:clickable="false"

android:id="@+id/canvas">

<TextView

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android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Username"
android:id="@+id/txtUsername"
android:textColorHighlight="#4d77e2"
android:textIsSelectable="true"
android:typeface="serif"
android:textStyle="bold|italic"
android:textColor="#ffffff"
android:textSize="20dp"
android:layout_marginBottom="5dp"
android:layout_above="@+id/edtUsername"
android:layout_alignParentLeft="true"/>

<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/edtUsername"
android:hint="Enter Your Username"
android:textColorHint="#7a7a7a"
android:layout_above="@+id/txtPassword"
android:layout_alignLeft="@id/txtPassword"
android:layout_alignRight="@+id/imageView" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Password"
android:id="@+id/txtPassword"
android:textStyle="bold|italic"
android:typeface="serif"
android:textColor="#ffffff"
android:textIsSelectable="false"
android:textSize="20dp"
android:layout_centerVertical="true"
android:layout_alignRight="@+id/txtUsername" />

<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:id="@+id/edtPassword"
android:hint="Enter Your Password"
android:textColorHint="#7a7a7a"
android:layout_below="@+id/txtPassword"
android:layout_alignLeft="@+id/txtPassword"
android:layout_alignRight="@+id/textView" />

<Button
android:layout_width="wrap_content"

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android:layout_height="wrap_content"
android:text="Change Background Color"
android:id="@+id/btnLogin"
android:typeface="serif"
android:layout_below="@+id/edtPassword"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Note: Username &quot;CSE&quot; and Password &quot;EBET&quot;"
android:id="@+id/textView"
android:textStyle="normal|italic"
android:typeface="serif"
android:textColor="#fbfbfb"
android:layout_below="@+id/btnLogin"
android:layout_centerHorizontal="true"
android:layout_marginTop="41dp" />


<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageView"
android:src="@drawable/ebetlogo"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_above="@+id/txtUsername" />

<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Change Font"
android:id="@+id/btnFont"
android:layout_below="@+id/textView"
android:layout_alignLeft="@+id/btnLogin"
android:layout_alignStart="@+id/btnLogin"
android:layout_alignRight="@+id/btnLogin"
android:layout_alignEnd="@+id/btnLogin" />
</RelativeLayout>

mainactivity.java
package com.sg.gui;

import android.graphics.Typeface;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

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import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

Button btnLogin;
Button btnFont;
EditText edtUsername, edtPassword;
RelativeLayout canvas;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

btnLogin = (Button)findViewById(R.id.btnLogin);
btnFont = (Button)findViewById(R.id.btnFont);
edtUsername = (EditText)findViewById(R.id.edtUsername);
edtPassword =(EditText)findViewById(R.id.edtPassword);
canvas = (RelativeLayout)findViewById(R.id.canvas);

btnLogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

String username=null, password=null;
username = edtUsername.getText().toString();
password = edtPassword.getText().toString();

if(username.equals("CSE") && password.equals("EBET")){
Toast.makeText(getApplicationContext(),"User
authenticated!",Toast.LENGTH_LONG).show();
canvas.setBackgroundResource(R.color.bgcolor);
}else{
Toast.makeText(getApplicationContext(),"Please check your
Credentials",Toast.LENGTH_LONG).show();
}

}
});

btnFont.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

TextView tx = (TextView)findViewById(R.id.textView);

Typeface custom_font = Typeface.createFromAsset(getAssets(),
"fonts/sansbold.ttf");

tx.setTypeface(custom_font);

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}
});
}
}





Output:

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Result:
Thus the android application that uses GUI components, Font and Colours is
developed and tested using android studio.

9. Builders Engineering College 7

Ex.No: 2 Develop an application that uses Layout Managers and event listeners
Date:

Aim:
To develop an android application that uses Layout Managers and event listeners
using android studio.

Procedure:
1. Open eclipse or android studio and select new android project.
2. Give project name and select next.
3. Choose the android version. Choose the lowest android version(Android 2.2) and
select next.
4. Enter the package name. Package name must be two word separated by comma and
click finish.
5. Go to package explorer in the left hand side. Select the project.
6. Go to “res“ folder and select layout. Double click the activitymain.xml file.
7. Now you can see the Graphics layout window.
8. Click the activitymain.xml file and type the code.
9. Go to project explorer and select “src” folder. Now select mainactivity.java file
and type the code.
10. Go to activitymain.xml and right click. Select run as option and select run
configuration.
11. Android output is present in the android emulator.

Program: activitymain.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Layout and Listener Program"

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android:id="@+id/txtSample"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />

<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/txtSample"
android:layout_centerHorizontal="true">


<ImageView
android:layout_width="111dp"
android:layout_height="111dp"
android:id="@+id/imageView"
android:layout_gravity="center_horizontal"
android:src="@drawable/number1" />

<TableLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">

<TableRow
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/tableRow"
android:orientation="horizontal">

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Click Me"
android:id="@+id/btnClick" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Long Click Me"
android:id="@+id/btnLongClick" />
</TableRow>
</TableLayout>

<GridLayout
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:id="@+id/lytGrid">

<Button
android:layout_width="202dp"
android:layout_height="156dp"
android:text="Click or Long CLick \n Me"
android:id="@+id/btnAll"

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android:layout_column="3"
android:layout_row="0"
android:layout_columnSpan="1"
android:layout_rowSpan="2" />

<Button
android:layout_width="143dp"
android:layout_height="match_parent"
android:text="Show \nMy \nName"
android:id="@+id/btnShowName"
android:layout_row="1"
android:layout_column="2"
android:layout_rowSpan="3" />

<EditText
android:layout_width="match_parent"
android:layout_height="62dp"
android:id="@+id/txtName"
android:layout_row="3"
android:layout_column="3"
android:hint="Enter your Name"
android:layout_columnSpan="1"
android:layout_rowSpan="1" />

</GridLayout>
</LinearLayout>
</RelativeLayout>


Program: mainactivity.java
package com.sg.layout;

import android.content.ClipData;
import android.content.ClipDescription;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.DragEvent;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.sg.layout.R;

public class MainActivity extends AppCompatActivity {

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Button clickBtn, longClickBtn, allBtn, btnShow;
TextView sample;
EditText nameTxt;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);


clickBtn = (Button) findViewById(R.id.btnClick);
longClickBtn = (Button) findViewById(R.id.btnLongClick);
allBtn = (Button) findViewById(R.id.btnAll);
btnShow = (Button) findViewById(R.id.btnShowName);
sample = (TextView) findViewById(R.id.txtSample);
nameTxt = (EditText) findViewById(R.id.txtName);


clickBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Click event!",
Toast.LENGTH_SHORT).show();
}
});


longClickBtn.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {

Toast.makeText(getApplicationContext(), "Long click event!",
Toast.LENGTH_SHORT).show();
return false;
}
});

allBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "You Just Clicked Me!",
Toast.LENGTH_SHORT).show();
}
});

allBtn.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
Toast.makeText(getApplicationContext(), "You clicked me for long!",
Toast.LENGTH_SHORT).show();
return false;
}
});

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btnShow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sample.setText(nameTxt.getText().toString());
}
});

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {

int id = item.getItemId();


if (id == R.id.action_settings) {
return true;
}

return super.onOptionsItemSelected(item);
}
}

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Output:













Result:
Thus the android application that Layout Managers and event listeners is developed
and tested using android studio.

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Ex.No: 3 Develop a native calculator application
Date:
Aim:
To develop a native calculator application using android studio.

Procedure:
1. Open eclipse or android studio and select new android project.
2. Give project name and select next.
3. Choose the android version. Choose the lowest android version(Android 2.2) and
select next.
4. Enter the package name. Package name must be two word separated by comma and
click finish.
5. Go to package explorer in the left hand side. Select the project.
6. Go to “res“ folder and select layout. Double click the activitymain.xml file.
7. Now you can see the Graphics layout window.
8. Click the activitymain.xml file and type the code.
9. Go to project explorer and select “src” folder. Now select mainactivity.java file
and type the code.
10. Go to activitymain.xml and right click. Select run as option and select run
configuration.
11. Android output is present in the android emulator.
Program: activitymain.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity">

<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">

<EditText
android:layout_width="fill_parent"
android:layout_height="77dp"

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android:id="@+id/txtScreen"
android:inputType="number|numberDecimal|numberSigned"
android:textSize="@dimen/activity_vertical_margin"/>

<TableLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">

<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal">

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1"
android:id="@+id/btn1" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="2"
android:id="@+id/btn2" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="3"
android:id="@+id/btn3" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="4"
android:id="@+id/btn4" />
</TableRow>

<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center">

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="5"
android:id="@+id/btn5" />

<Button
android:layout_width="wrap_content"

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android:layout_height="wrap_content"
android:text="6"
android:id="@+id/btn6" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="7"
android:id="@+id/btn7" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="8"
android:id="@+id/btn8" />
</TableRow>

<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center">

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="9"
android:id="@+id/btn9" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0"
android:id="@+id/btn0" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="."
android:id="@+id/btnDot" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="C"
android:id="@+id/btnClear" />
</TableRow>

<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal">

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<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="+"
android:id="@+id/btnAdd" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="-"
android:id="@+id/btnSubtract" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="/"
android:id="@+id/btnDivide" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="*"
android:id="@+id/btnMultiply" />
</TableRow>

<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center">

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="="
android:id="@+id/btnEquals"
android:layout_span="4" />
</TableRow>

</TableLayout>
</LinearLayout>
</RelativeLayout>

mainactivity.java
package com.sg.calculator;

import android.annotation.TargetApi;
import android.os.Build;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.View;

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import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.sg.calculator.R;

public class MainActivity extends ActionBarActivity {

private EditText Scr;
private float NumberBf=0, NumAf, result=0;
private String Operation, mod="replace";

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

Scr = (EditText) findViewById(R.id.txtScreen);
Scr.setText("");

int idList[] = {R.id.btn0, R.id.btn1, R.id.btn2, R.id.btn2, R.id.btn3, R.id.btn4,
R.id.btn5, R.id.btn6, R.id.btn7, R.id.btn8, R.id.btn9,
R.id.btnAdd, R.id.btnSubtract, R.id.btnMultiply, R.id.btnDivide,
R.id.btnClear,R.id.btnEquals, R.id.btnDot, };

for(int id:idList) {
View v = (View) findViewById(id);
v.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onButtonClick(v);
}
});
}

}

public void mMath(String str) {
mResult();
try {
NumberBf = Float.parseFloat(Scr.getText().toString());
Operation = str;
}catch (Exception e) {
Toast.makeText(getApplicationContext(),(CharSequence) e,
Toast.LENGTH_SHORT).show();
Scr.setText("SYNTAX ERROR");
mod="replace";
}
}

@TargetApi(Build.VERSION_CODES.GINGERBREAD)
public void mResult() {
NumAf = 0;

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if(!Scr.getText().toString().trim().isEmpty())
NumAf = Float.parseFloat(Scr.getText().toString());
result = NumAf;
try {
switch (Operation) {
case "+":
result = NumAf + NumberBf;
break;
case "-":
result = NumberBf - NumAf;
break;
case "*":
result = NumAf * NumberBf;
break;
case "/":
result = NumberBf / NumAf;
break;

default:
result = NumAf;
break;
}
} catch (Exception e) {
e.printStackTrace();
}

Scr.setText(String.valueOf(result));
mod = "replace";

}

public void getKeyboard(String str) {
String ScrTxt = Scr.getText().toString();
ScrTxt += str;
if(mod.equals("add"))
Scr.setText(ScrTxt);
else
Scr.setText(str);
mod = "add";
}

public void onButtonClick(View v) {
switch (v.getId()) {
case R.id.btnClear: //Clear
Scr.setText("");
NumberBf = 0;
Operation = "";
break;

case R.id.btnAdd:
mMath("+");
break;

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case R.id.btnSubtract:
if(mod.equals("replace")) {
String numb = ((Button) v).getText().toString();
getKeyboard(numb);
}
else mMath("-");
break;

case R.id.btnMultiply:
mMath("*");
break;

case R.id.btnDivide:
mMath("/");
break;

case R.id.btnEquals:
mResult();
Operation = "";
NumberBf = 0;
break;

default:
String numb = ((Button) v).getText().toString();
getKeyboard(numb);
break;
}
}


}

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Output:







Result:
Thus the native calculator application is developed and tested using android studio.

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Ex.No: 4 Write an application that draws basic graphical
Date: primitives on the screen
Aim:
To write an application that draws basic graphical primitives on the screen using
android studio.

Procedure:
1. Open eclipse or android studio and select new android project.
2. Give project name and select next.
3. Choose the android version. Choose the lowest android version(Android 2.2) and
select next.
4. Enter the package name. Package name must be two word separated by comma and
click finish.
5. Go to package explorer in the left hand side. Select the project.
6. Go to “res“ folder and select layout. Double click the activitymain.xml file.
7. Now you can see the Graphics layout window.
8. Click the activitymain.xml file and type the code.
9. Go to project explorer and select “src” folder. Now select mainactivity.java and
create samplecanvas.java files and type the code.
10. Go to activitymain.xml and right click. Select run as option and select run
configuration.
11. Android output is present in the android emulator.
Program: activitymain.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.sg.graphic.MainActivity">

<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">

<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"

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android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />

</android.support.design.widget.AppBarLayout>

<include layout="@layout/content_main" />

<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
android:src="@android:drawable/ic_dialog_email" />

</android.support.design.widget.CoordinatorLayout>

mainactivity.java
package com.sg.graphic;

import android.app.Activity;
import android.os.Bundle;

public class MainActivity extends Activity {


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

com.sg.graphic.Canvas1 drawView = new Canvas1(this);

setContentView(drawView);
}
}

Canvas.java
package com.sg.graphic;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;


public class Canvas1 extends View{

Paint paint = new Paint();

25. Builders Engineering College 23


public Canvas1(Context context) {
super(context);
}

@Override
protected void onDraw(Canvas canvas) {
paint.setColor(Color.BLUE);
paint.setStrokeWidth(0);

canvas.drawRect(100, 100, 300, 300, paint);

paint.setColor(Color.GREEN);
canvas.drawCircle(200, 400, 75, paint);

paint.setColor(Color.MAGENTA);
paint.setStrokeWidth(4);
canvas.drawLine(100, 540, 300, 540, paint);

paint.setColor(getResources().getColor(R.color.teal_blue));

canvas.drawText("Graphical Primitive",100,50,paint);

paint.setColor(Color.RED);
paint.setStrokeWidth(6);
canvas.drawPoint(200,600,paint);


}
}

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Output:













Result:
Thus the application that draws basic graphical primitives on the screen is developed
and tested using android studio.

27. Builders Engineering College 25

Ex.No: 5 Develop an application that makes use of database
Date:

Aim:
To develop an application that makes use of database using android studio.

Procedure:
1. Open eclipse or android studio and select new android project.
2. Give project name and select next.
3. Choose the android version. Choose the lowest android version(Android 2.2) and
select next.
4. Enter the package name. Package name must be two word separated by comma and
click finish.
5. Go to package explorer in the left hand side. Select the project.
6. Go to “res“ folder and select layout. Double click the activitymain.xml file.
7. Now you can see the Graphics layout window.
8. Click the activitymain.xml file and type the code.
9. Go to project explorer and select “src” folder. Now select mainactivity.java file
and type the code.
10. Go to activitymain.xml and right click. Select run as option and select run
configuration.
11. Android output is present in the android emulator.
Program: activitymain.xml
<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/myLayout"
android:stretchColumns="0"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:text="@string/title"
android:layout_x="110dp"
android:layout_y="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView android:text="@string/roll_no"
android:layout_x="30dp"
android:layout_y="50dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<EditText android:id="@+id/editRollno"
android:inputType="number"

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android:layout_x="150dp"
android:layout_y="50dp"
android:layout_width="150dp"
android:layout_height="40dp"/>
<TextView android:text="@string/name"
android:layout_x="30dp"
android:layout_y="100dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<EditText android:id="@+id/editName"
android:inputType="text"
android:layout_x="150dp"
android:layout_y="100dp"
android:layout_width="150dp"
android:layout_height="40dp"/>
<TextView android:text="@string/marks"
android:layout_x="30dp"
android:layout_y="150dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<EditText android:id="@+id/editMarks"
android:inputType="number"
android:layout_x="150dp"
android:layout_y="150dp"
android:layout_width="150dp"
android:layout_height="40dp"/>
<Button android:id="@+id/btnAdd"
android:text="@string/add"
android:layout_x="30dp"
android:layout_y="200dp"
android:layout_width="100dp"
android:layout_height="40dp"/>
<Button android:id="@+id/btnDelete"
android:text="@string/delete"
android:layout_x="150dp"
android:layout_y="200dp"
android:layout_width="100dp"
android:layout_height="40dp"/>n
<Button android:id="@+id/btnModify"
android:text="@string/modify"
android:layout_x="30dp"
android:layout_y="250dp"
android:layout_width="100dp"
android:layout_height="40dp"/>
<Button android:id="@+id/btnView"
android:text="@string/view"
android:layout_x="150dp"
android:layout_y="250dp"
android:layout_width="100dp"
android:layout_height="40dp"/>
<Button android:id="@+id/btnViewAll"
android:text="@string/view_all"
android:layout_x="30dp"

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android:layout_y="300dp"
android:layout_width="100dp"
android:layout_height="40dp"/>

</AbsoluteLayout>

mainactivity.java
package com.sg.database;

import android.app.Activity;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity implements OnClickListener
{
EditText editRollno,editName,editMarks;
Button btnAdd,btnDelete,btnModify,btnView,btnViewAll,btnShowInfo;
SQLiteDatabase db;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editRollno=(EditText)findViewById(R.id.editRollno);
editName=(EditText)findViewById(R.id.editName);
editMarks=(EditText)findViewById(R.id.editMarks);
btnAdd=(Button)findViewById(R.id.btnAdd);
btnDelete=(Button)findViewById(R.id.btnDelete);
btnModify=(Button)findViewById(R.id.btnModify);
btnView=(Button)findViewById(R.id.btnView);
btnViewAll=(Button)findViewById(R.id.btnViewAll);
btnAdd.setOnClickListener(this);
btnDelete.setOnClickListener(this);
btnModify.setOnClickListener(this);
btnView.setOnClickListener(this);
btnViewAll.setOnClickListener(this);
db=openOrCreateDatabase("StudentDB", Context.MODE_PRIVATE, null);
db.execSQL("CREATE TABLE IF NOT EXISTS student(rollno VARCHAR,name
VARCHAR,marks VARCHAR);");
}
public void onClick(View view)
{
if(view==btnAdd)
{

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if(editRollno.getText().toString().trim().length()==0||
editName.getText().toString().trim().length()==0||
editMarks.getText().toString().trim().length()==0)
{
showMessage("Error", "Please enter all values");
return;
}
db.execSQL("INSERT INTO student
VALUES('"+editRollno.getText()+"','"+editName.getText()+
"','"+editMarks.getText()+"');");
showMessage("Success", "Record added");
clearText();
}
if(view==btnDelete)
{
if(editRollno.getText().toString().trim().length()==0)
{
showMessage("Error", "Please enter Rollno");
return;
}
Cursor c=db.rawQuery("SELECT * FROM student WHERE
rollno='"+editRollno.getText()+"'", null);
if(c.moveToFirst())
{
db.execSQL("DELETE FROM student WHERE
rollno='"+editRollno.getText()+"'");
showMessage("Success", "Record Deleted");
}
else
{
showMessage("Error", "Invalid Rollno");
}
clearText();
}
if(view==btnModify)
{
if(editRollno.getText().toString().trim().length()==0)
{
showMessage("Error", "Please enter Rollno");
return;
}
Cursor c=db.rawQuery("SELECT * FROM student WHERE
rollno='"+editRollno.getText()+"'", null);
if(c.moveToFirst())
{
db.execSQL("UPDATE student SET
name='"+editName.getText()+"',marks='"+editMarks.getText()+
"' WHERE rollno='"+editRollno.getText()+"'");
showMessage("Success", "Record Modified");
}
else
{
showMessage("Error", "Invalid Rollno");

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}
clearText();
}
if(view==btnView)
{
if(editRollno.getText().toString().trim().length()==0)
{
showMessage("Error", "Please enter Rollno");
return;
}
Cursor c=db.rawQuery("SELECT * FROM student WHERE
rollno='"+editRollno.getText()+"'", null);
if(c.moveToFirst())
{
editName.setText(c.getString(1));
editMarks.setText(c.getString(2));
}
else
{
showMessage("Error", "Invalid Rollno");
clearText();
}
}
if(view==btnViewAll)
{
Cursor c=db.rawQuery("SELECT * FROM student", null);
if(c.getCount()==0)
{
showMessage("Error", "No records found");
return;
}
StringBuffer buffer=new StringBuffer();
while(c.moveToNext())
{
buffer.append("Rollno: "+c.getString(0)+"\n");
buffer.append("Name: "+c.getString(1)+"\n");
buffer.append("Marks: "+c.getString(2)+"\n\n");
}
showMessage("Student Details", buffer.toString());
}

}
public void showMessage(String title,String message)
{
Builder builder=new Builder(this);
builder.setCancelable(true);
builder.setTitle(title);
builder.setMessage(message);
builder.show();
}
public void clearText()
{
editRollno.setText("");

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editName.setText("");
editMarks.setText("");
editRollno.requestFocus();
}
}

Output:









Result:
Thus the application that makes use of database is developed and tested using
android studio.

33. Builders Engineering College 31

Ex.No: 6 Develop an application that makes use of RSS Feed
Date:

Aim:
To develop an application that makes use of RSS Feed using android studio.

Procedure:
1. Open eclipse or android studio and select new android project.
2. Give project name and select next.
3. Choose the android version. Choose the lowest android version(Android 2.2) and
select next.
4. Enter the package name. Package name must be two word separated by comma and
click finish.
5. Go to package explorer in the left hand side. Select the project.
6. Go to “res“ folder and select layout. Double click the activitymain.xml file.
7. Now you can see the Graphics layout window.
8. Click the activitymain.xml file and type the code also create supporting layout files.
9. Go to project explorer and select “src” folder. Now select mainactivity.java file
and type the code also create the supporting java codes.
10. Go to activitymain.xml and right click. Select run as option and select run
configuration.
11. Android output is present in the android emulator.
Program: activitymain.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.linuxpert.mitcourses.MainActivity">

<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/lstMain" />
</RelativeLayout>

34. Builders Engineering College 32


activity_rss_loader.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.linuxpert.mitcourses.RssLoader">

<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/lstRssFeed"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />

<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/feedProgress"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:indeterminate="false" />
</RelativeLayout>

main_list_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="1"
android:id="@+id/txtIndex"
android:textStyle="normal"
android:textSize="20sp"
android:layout_marginRight="10dp" />

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Title"

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android:id="@+id/txtTitle"
android:textSize="20sp"
android:textStyle="normal" />
</LinearLayout>


rss_list_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp">


<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Title"
android:id="@+id/txtTitle"
android:textStyle="bold"
android:textSize="20sp" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="http://www.example.com/post1"
android:id="@+id/txtLink" />
</LinearLayout>

mainactivity.java
package com.sg.mitcourses;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

ArrayList<Course> courses = new ArrayList<Course>();
public static String rss_path = "http://192.168.1.254/mit/";

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

/*ADD THE COURSES TO LIST*/
courses.add(new Course("Aeronautics and Astronautics", "mit-aeronautics-and-
astronautics.xml"));

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courses.add(new Course("Anthropology","mit-anthropology.xml"));
courses.add(new Course("Architecture","mit-architecture.xml"));
courses.add(new Course("Athletics, Physical Education and Recreation","mit-athletics-
physical-education-and-recreation.xml"));
courses.add(new Course("Biological Engineering","mit-biological-engineering.xml"));
courses.add(new Course("Biology","mit-biology.xml"));

/*END OF LIST*/

ListView mainList = (ListView)findViewById(R.id.lstMain);
MainListAdapter adapter = new
MainListAdapter(this,R.layout.main_list_layout,courses);
mainList.setAdapter(adapter);

MainListItemClickListener listener = new MainListItemClickListener(courses,this);

mainList.setOnItemClickListener(listener);

}
}


MainListAdapter.java
package com.sg.mitcourses;

import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import java.util.ArrayList;

public class MainListAdapter extends ArrayAdapter<Course> {

int layoutResourceId;
Context context;
ArrayList<Course> list;

public MainListAdapter(Context context, int resource, ArrayList<Course> objects) {
super(context, resource, objects);

this.layoutResourceId = resource;
this.context = context;
this.list = objects;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;

37. Builders Engineering College 35

MainListHolder holder = null;

if(row==null){
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId,parent,false);

holder = new MainListHolder();
holder.indexTxt = (TextView)row.findViewById(R.id.txtIndex);
holder.titleTxt = (TextView)row.findViewById(R.id.txtTitle);

row.setTag(holder);
}
else
holder = (MainListHolder)row.getTag();

Course course = list.get(position);

holder.indexTxt.setText(String.valueOf(position+1));
holder.titleTxt.setText(course.getTitle());

return row;
}

static class MainListHolder{
TextView indexTxt,titleTxt;
}
}

MainListItemClickListener.java
package com.sg.mitcourses;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.view.View;
import android.widget.AdapterView;

import java.util.ArrayList;

public class MainListItemClickListener implements AdapterView.OnItemClickListener {

ArrayList<Course> list;
Activity activity;

public MainListItemClickListener(ArrayList<Course> list, Activity activity) {
this.list = list;
this.activity = activity;
}

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Course course = list.get(position);

38. Builders Engineering College 36

Intent intent = new Intent(activity,RssLoader.class);

intent.putExtra("title",course.getTitle());
intent.putExtra("link",MainActivity.rss_path+course.getUrl());

/*Remember we set the rss_path variable private so it can be called by 'dot' (.)
operator.*/

activity.startActivity(intent);
}
}


RssItem.java

package com.sg.mitcourses;

public class RssItem {

private String title,link;

public String getTitle() {
return title;
}

public void setTitle(String title) {
this.title = title;
}

public String getLink() {
return link;
}

public void setLink(String link) {
this.link = link;
}
}

RssItemClickListener.java
package com.sg.mitcourses;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.view.View;
import android.widget.AdapterView;

import java.util.ArrayList;

public class RssItemClickListener implements AdapterView.OnItemClickListener {

Activity activity;
ArrayList<RssItem> list;

39. Builders Engineering College 37


public RssItemClickListener(Activity activity, ArrayList<RssItem> list) {
this.activity = activity;
this.list = list;
}

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(list.get(position).getLink()));

activity.startActivity(intent);
//opens the link in a new browser window
}
}

RssListAdapter.java
package com.sg.mitcourses;

import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import org.w3c.dom.Text;

import java.util.ArrayList;

public class RssListAdapter extends ArrayAdapter<RssItem> {

int layoutResourceId;
Context context;
ArrayList<RssItem> list;

public RssListAdapter(Context context, int resource, ArrayList<RssItem> objects) {
super(context, resource, objects);

this.layoutResourceId = resource;
this.context = context;
this.list = objects;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
RssItemHolder holder = null;

if(row==null){
LayoutInflater inflater = ((Activity)context).getLayoutInflater();

40. Builders Engineering College 38

row = inflater.inflate(layoutResourceId,parent,false);

holder = new RssItemHolder();

holder.titleTxt = (TextView)row.findViewById(R.id.txtTitle);
holder.linkTxt = (TextView)row.findViewById(R.id.txtLink);

row.setTag(holder);
}
else
holder = (RssItemHolder)row.getTag();

RssItem item = list.get(position);

holder.titleTxt.setText(item.getTitle());
holder.linkTxt.setText(item.getLink());

return row;
}

static class RssItemHolder{
TextView titleTxt,linkTxt;
}
}


RssLoader.java
package com.sg.mitcourses;

import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.Toast;

import java.util.ArrayList;

public class RssLoader extends AppCompatActivity {

Activity local;
ProgressBar progressBar;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_rss_loader);

local = this;

41. Builders Engineering College 39

progressBar = (ProgressBar) findViewById(R.id.feedProgress);

Intent i = getIntent();
//gets the root intent
String title = i.getStringExtra("title");
//gets the String supplied with the tag title
String url = i.getStringExtra("link");
//gets the String supplied with the tag link

getRssData getRssData = new getRssData();
getRssData.execute(url);

//actionbar
getSupportActionBar().setTitle(title);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}

private class getRssData extends AsyncTask<String,Void,ArrayList<RssItem>>{

@Override
protected ArrayList<RssItem> doInBackground(String... params) {

try {
RssReader rssReader = new RssReader(params[0]);
//create rss reader
return rssReader.getItems();
//returns items parsed from rss file
} catch (Exception e) {
e.printStackTrace();
}

return null;
}

@Override
protected void onPostExecute(ArrayList<RssItem> rssItems) {
if(rssItems!=null) {
ListView rssList = (ListView) findViewById(R.id.lstRssFeed);

RssListAdapter adapter = new RssListAdapter(local, R.layout.rss_list_layout,
rssItems);

rssList.setAdapter(adapter);

rssList.setOnItemClickListener(new RssItemClickListener(local,rssItems));

Toast.makeText(local, "Feed Loaded", Toast.LENGTH_SHORT).show();
}
else
Toast.makeText(local,"Could not load feed. Check your network
connections.",Toast.LENGTH_SHORT).show();

progressBar.setVisibility(View.INVISIBLE);

42. Builders Engineering College 40


}

@Override
protected void onPreExecute() {
Toast.makeText(local,"Loading Feed",Toast.LENGTH_LONG).show();
}
}
}


RssParseHandler.java
package com.sg.mitcourses;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

import java.util.ArrayList;

public class RssParseHandler extends DefaultHandler {

private ArrayList<RssItem> rssItems; //list to store rss items parsed

private RssItem currentItem; //stores the currently parsing RssItem

private boolean parsingTitle, parsingLink; //parsing title/link indicators

public RssParseHandler() {
rssItems = new ArrayList<>();
}

public ArrayList<RssItem> getRssItems() {
return rssItems;
}

@Override
public void startElement(String uri, String localName, String qName, Attributes
attributes) throws SAXException {
if("item".equals(qName)){
currentItem = new RssItem(); //create a new RssItem to store data
} else if ("title".equals(qName)){
parsingTitle = true;
}
else if ("link".equals(qName)){
parsingLink = true;
}

//sets the current item to rss item when parsing item
//sets appropriate indicators to true when opening tags are processed
}

43. Builders Engineering College 41

@Override
public void endElement(String uri, String localName, String qName) throws
SAXException {
if("item".equals(qName)){
rssItems.add(currentItem);
currentItem = null;
} else if ("title".equals(qName)){
parsingTitle = false;
}
else if ("link".equals(qName)){
parsingLink = false;
}

//adds the current item to list
//sets appropriate indicators to false when closing tags are processed
}

@Override
public void characters(char[] ch, int start, int length) throws SAXException {
if(parsingTitle){
if(currentItem!=null) {
currentItem.setTitle(new String(ch, start, length)); //sets title of the current item
}
} else if (parsingLink){
if (currentItem!=null){
currentItem.setLink(new String(ch, start, length)); //sets link of the current item
}

}

/*
* Here we used if(parsingTitle), if(parsingLink).
* These indicators indicate whether title or link is executed.
* It helps to avoid the handler from parsing other unwanted characters inside other rss
tags.
*/
}
}


RssReader.java
package com.sg.mitcourses;

import java.util.ArrayList;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

public class RssReader {

private String rssUrl;

44. Builders Engineering College 42

public RssReader(String rssUrl) {
this.rssUrl = rssUrl;
}

public ArrayList<RssItem> getItems() throws Exception{

SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();

RssParseHandler handler = new RssParseHandler();

parser.parse(rssUrl,handler);
//parse the rss file located at rssUrl using the parsing handler 'handler'.

return handler.getRssItems();
//returns the list of items parsed
}

}



Course.java
package com.blogspot.shuttereditz.mitcourses;

public class Course {
private String title,url;

public Course(String title, String url) {
this.title = title;
this.url = url;
}

public String getTitle() {
return title;
}


public String getUrl() {
return url;
}

}

45. Builders Engineering College 43


Output:












Result:
Thus the application that makes use of RSS Feed is developed and tested using
android studio.

46. Builders Engineering College 44


Ex.No: 7 Implement an application that implements Multithreading
Date:

Aim:
To implement an application that implements Multithreading using android studio.

Procedure:
1. Open eclipse or android studio and select new android project.
2. Give project name and select next.
3. Choose the android version. Choose the lowest android version(Android 2.2) and
select next.
4. Enter the package name. Package name must be two word separated by comma and
click finish.
5. Go to package explorer in the left hand side. Select the project.
6. Go to “res“ folder and select layout. Double click the activitymain.xml file.
7. Now you can see the Graphics layout window.
8. Click the activitymain.xml file and type the code.
9. Go to project explorer and select “src” folder. Now select mainactivity.java file
and type the code.
10. Go to activitymain.xml and right click. Select run as option and select run
configuration.
11. Android output is present in the android emulator.
Program: activitymain.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<ProgressBar
android:id="@+id/progressBar1"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:indeterminate="false"
android:max="10"
android:padding="4dip" >
</ProgressBar>

<TextView

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android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="" >
</TextView>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="startProgress"
android:text="Start Progress" >
</Button>

</LinearLayout>

Mainactivity.java
package com.sg.multithread;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;

public class MainActivity extends Activity {
private ProgressBar progress;
private TextView text;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progress = (ProgressBar) findViewById(R.id.progressBar1);
text = (TextView) findViewById(R.id.textView1);

}

public void startProgress(View view) {
// do something long
Runnable runnable = new Runnable() {
@Override
public void run() {
for (int i = 0; i <= 10; i++) {
final int value = i;
doFakeWork();
progress.post(new Runnable() {
@Override
public void run() {
text.setText("Loading");
progress.setProgress(value);
}
});

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}
}
};
new Thread(runnable).start();
}

// Simulating something timeconsuming
private void doFakeWork() {
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}

}


Output:


Result:
Thus the application that implements Multithreading is implemented and tested
using android studio.

49. Builders Engineering College 47

Ex.No: 8 Develop a native application that uses GPS location information
Date:

Aim:
To develop a native application that uses GPS location information using android
studio.

Procedure:
1. Open eclipse or android studio and select new android project.
2. Give project name and select next.
3. Choose the android version. Choose the lowest android version(Android 2.2) and
select next.
4. Enter the package name. Package name must be two word separated by comma and
click finish.
5. Go to package explorer in the left hand side. Select the project.
6. Go to “res“ folder and select layout. Double click the activitymain.xml file.
7. Now you can see the Graphics layout window.
8. Click the activitymain.xml file and type the code.
9. Go to project explorer and select “src” folder. Now select mainactivity.java file
and type the code.
10. Go to activitymain.xml and right click. Select run as option and select run
configuration.
11. Android output is present in the android emulator.
Program: activitymain.xml
<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/relativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<Button
android:id="@+id/show_Location"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show_Location"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
/>
</RelativeLayout>

50. Builders Engineering College 48



Mainactivity.java
package com.sg.gps;
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;

public class GPStrace extends Service implements
LocationListener{
private final Context context;
boolean isGPSEnabled=false;
boolean canGetLocation=false;
boolean isNetworkEnabled=false;
Location location;
double latitude;
double longtitude;
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES=10;
private static final long MIN_TIME_BW_UPDATES=1000*60*1;
protected LocationManager locationManager;
public GPStrace(Context context)
{
this.context=context;
getLocation();
}
public Location getLocation()
{
try{
locationManager=(LocationManager)
context.getSystemService(LOCATION_SERVICE);
isGPSEnabled=locationManager.isProviderEnabled(LocationManag
er.GPS_PROVIDER);
application that draws
basic graphical primitives
on the screen in android
Develop
a native
calculator
application
Implement an application
that creates an alert
upon receiving a
message in android

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Develop
an
application that makes
use of RSS Feed
isNetworkEnabled=locationManager.isProviderEnabled(LocationM
anager.NETWORK_PROVIDER);
if(!isGPSEnabled && !isNetworkEnabled){
}else{
this.canGetLocation=true;
if(isNetworkEnabled){
Develop
an
application that makes
use of database
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES,this);
}
if(locationManager!=null){
Write a
mobile
application that creates
alarm clock in android
location=locationManager.getLastKnownLocation(LocationManager
.NETWORK_PROVIDER);
if(location !=null){
latitude=location.getLatitude();
longtitude=location.getLongitude();
FAMOUS QUOTES
}
}
}
if(isGPSEnabled){
if(location==null){
locationManager.requestLocationUpdates(LocationManager.GPS_PR
OVIDER,MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES,
this);
if(locationManager!=null){
location=locationManager.getLastKnownLocation(LocationManager
.GPS_PROVIDER);
if(location!=null){
latitude=location.getLatitude();
longtitude=location.getLongitude();
}
Androidmaifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.sg.gps">

<application

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android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>

Output:


Result:
Thus the application native application that uses GPS location information is
developed and tested using android studio.

53. Builders Engineering College 51

Ex.No: 9 Implement an application that writes data to the SD card
Date:

Aim:
To implement an application that writes data to the SD card using android studio.

Procedure:
1. Open eclipse or android studio and select new android project.
2. Give project name and select next.
3. Choose the android version. Choose the lowest android version(Android 2.2) and
select next.
4. Enter the package name. Package name must be two word separated by comma and
click finish.
5. Go to package explorer in the left hand side. Select the project.
6. Go to “res“ folder and select layout. Double click the activitymain.xml file.
7. Now you can see the Graphics layout window.
8. Click the activitymain.xml file and type the code.
9. Go to project explorer and select “src” folder. Now select mainactivity.java file
and type the code.
10. Go to activitymain.xml and right click. Select run as option and select run
configuration.
11. Android output is present in the android emulator.
Program: activitymain.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.linuxpert.myfileapp.MainActivity">

<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/txtWrite"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />

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<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Write"
android:id="@+id/btnWrite"
android:layout_below="@+id/txtWrite"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Read"
android:id="@+id/btnRead"
android:layout_below="@+id/txtWrite"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:id="@+id/txtRead"
android:layout_below="@+id/btnWrite"
android:layout_centerHorizontal="true"
android:layout_marginTop="44dp" />

</RelativeLayout>

Mainactivity.java
package com.sg.myfileapp;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
public class MainActivity extends AppCompatActivity {
EditText txtWrite;
Button btnWrite,btnRead;
TextView txtRead;
@Override
protected void onCreate(Bundle savedInstanceState) {

55. Builders Engineering College 53

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txtWrite = (EditText)findViewById(R.id.txtWrite);
txtRead = (TextView)findViewById(R.id.txtRead);
btnWrite = (Button)findViewById(R.id.btnWrite);
btnRead = (Button)findViewById(R.id.btnRead);
btnWrite.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String text = txtWrite.getText().toString();//read data from text field
try {
FileOutputStream ofStream = new FileOutputStream(new
File(getFilesDir(),"demo"));
/*
* file output stream which writes into a new file named demo with the path we
get from
* getFilesDir() function which corresponds to internal memory.
* - getCacheDir() - cache memory
*/
OutputStreamWriter osWriter = new OutputStreamWriter(ofStream);
//create a new writer from ofStream
osWriter.write(text);
//writes data into the file
osWriter.close();
ofStream.close();
//closing stream and writer
} catch (IOException e) {
e.printStackTrace();
}
}
});

btnRead.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

try {
FileInputStream ifStream = new FileInputStream(new File(getFilesDir(),"demo"));
/* creates input stream for reading from the file*/
BufferedReader bReader = new BufferedReader(new
InputStreamReader(ifStream));
/* Here we created a new InputStreamReader from the ifStream.
* (Like we created an OutputStreamWriter from ofStream).
* And we've created a BufferedReader from this InputStreamReader.
* The buffered reader is used to read data from a file as Strings.
*/
String read=""; //creating an empty string to save the read data from file.
String line;
/* Here we read the file line by line so String line is used to store the data
* of the current line the reader pointer is positioned at.
*/
while((line=bReader.readLine())!=null){
/*confirms the line is not null so as to execute loop.*/

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/*If it is null it means the pointer is at the end of file*/
read+=line+"\n";
}
bReader.close();
ifStream.close();
//closing stream and reader
txtRead.setText(read); //setting the text of the text view
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}

Output:




Result:
Thus the application that writes data to the SD card is implemented and tested using
android studio.

57. Builders Engineering College 55

Ex.No: 10 Implement an application that creates an alert upon
Date: receiving a message

Aim:
To implement an application that creates an alert upon receiving a message using
android studio.

Procedure:
1. Open eclipse or android studio and select new android project.
2. Give project name and select next.
3. Choose the android version. Choose the lowest android version(Android 2.2) and
select next.
4. Enter the package name. Package name must be two word separated by comma and
click finish.
5. Go to package explorer in the left hand side. Select the project.
6. Go to “res“ folder and select layout. Double click the activitymain.xml file.
7. Now you can see the Graphics layout window.
8. Click the activitymain.xml file and type the code.
9. Go to project explorer and select “src” folder. Now select mainactivity.java file
and type the code.
10. Go to activitymain.xml and right click. Select run as option and select run
configuration.
11. Android output is present in the android emulator.
Program: activitymain.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity">

<TextView
android:id="@+id/simpleDialog"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Alert Dialog" />

<Button

58. Builders Engineering College 56

android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Show Alert Dialog"
android:layout_below="@+id/simpleDialog"
android:layout_marginTop="16dp"
android:onClick="showDialog"/>

</RelativeLayout>

Mainactivity.java
package com.sg.alertdialog;
// Simple android alert dialog example

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}

public void showDialog(View view){
AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();
alertDialog.setTitle("Alert");
alertDialog.setMessage("Welcome to EBETi");
// Alert dialog button
alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL, "OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Alert dialog action goes here
// onClick button code here
dialog.dismiss();// use dismiss to cancel alert dialog
}
});
alertDialog.show();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {

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// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();

//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}

return super.onOptionsItemSelected(item);
}
}


Output:



Result:
Thus the application that creates an alert upon receiving a message is implemented
and tested using android studio.

60. Builders Engineering College 58

Ex.No: 11 Write a mobile application that creates alarm clock
Date:

Aim:
To write a mobile application that creates alarm clock using android studio.

Procedure:
1. Open eclipse or android studio and select new android project.
2. Give project name and select next.
3. Choose the android version. Choose the lowest android version(Android 2.2) and
select next.
4. Enter the package name. Package name must be two word separated by comma and
click finish.
5. Go to package explorer in the left hand side. Select the project.
6. Go to “res“ folder and select layout. Double click the activitymain.xml file.
7. Now you can see the Graphics layout window.
8. Click the activitymain.xml file and type the code.
9. Go to project explorer and select “src” folder. Now select mainactivity.java file
and type the code.
10. Go to activitymain.xml and right click. Select run as option and select run
configuration.
11. Android output is present in the android emulator.
Program: activitymain.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MyActivity">

<TimePicker
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/alarmTimePicker"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />

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<ToggleButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Alarm On/Off"
android:id="@+id/alarmToggle"
android:layout_centerHorizontal="true"
android:layout_below="@+id/alarmTimePicker"
android:onClick="onToggleClicked" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text=""
android:id="@+id/alarmText"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp"
android:layout_below="@+id/alarmToggle" />

</RelativeLayout>

Alarmactivity.java
package com.sg.alarm;


import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.ToggleButton;

import java.util.Calendar;

public class AlarmActivity extends Activity {

AlarmManager alarmManager;
private PendingIntent pendingIntent;
private TimePicker alarmTimePicker;
private static AlarmActivity inst;
private TextView alarmTextView;

public static AlarmActivity instance() {
return inst;
}

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@Override
public void onStart() {
super.onStart();
inst = this;
}

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
alarmTimePicker = (TimePicker) findViewById(R.id.alarmTimePicker);
alarmTextView = (TextView) findViewById(R.id.alarmText);
ToggleButton alarmToggle = (ToggleButton) findViewById(R.id.alarmToggle);
alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
}

public void onToggleClicked(View view) {
if (((ToggleButton) view).isChecked()) {
Log.d("MyActivity", "Alarm On");
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, alarmTimePicker.getCurrentHour());
calendar.set(Calendar.MINUTE, alarmTimePicker.getCurrentMinute());
Intent myIntent = new Intent(AlarmActivity.this, AlarmReceiver.class);
pendingIntent = PendingIntent.getBroadcast(AlarmActivity.this, 0, myIntent, 0);
alarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);
} else {
alarmManager.cancel(pendingIntent);
setAlarmText("");
Log.d("MyActivity", "Alarm Off");
}
}

public void setAlarmText(String alarmText) {
alarmTextView.setText(alarmText);
}
}

Alarmreceiver.java
package com.sg.alarm;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.support.v4.content.WakefulBroadcastReceiver;

public class AlarmReceiver extends WakefulBroadcastReceiver {

@Override

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public void onReceive(final Context context, Intent intent) {
//this will update the UI with message
AlarmActivity inst = AlarmActivity.instance();
inst.setAlarmText("Alarm! Wake up! Wake up!");

//this will sound the alarm tone
//this will sound the alarm once, if you wish to
//raise alarm in loop continuously then use MediaPlayer and setLooping(true)
Uri alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
if (alarmUri == null) {
alarmUri =
RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
}
Ringtone ringtone = RingtoneManager.getRingtone(context, alarmUri);
ringtone.play();

//this will send a notification message
ComponentName comp = new ComponentName(context.getPackageName(),
AlarmService.class.getName());
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}

Alarmservice.java
package com.sg.alarm;


import android.app.IntentService;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;
import android.util.Log;

public class AlarmService extends IntentService {
private NotificationManager alarmNotificationManager;

public AlarmService() {
super("AlarmService");
}

@Override
public void onHandleIntent(Intent intent) {
sendNotification("Wake Up! Wake Up!");
}

private void sendNotification(String msg) {
Log.d("AlarmService", "Preparing to send notification...: " + msg);
alarmNotificationManager = (NotificationManager) this
.getSystemService(Context.NOTIFICATION_SERVICE);

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PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
new Intent(this, AlarmActivity.class), 0);

NotificationCompat.Builder alamNotificationBuilder = new
NotificationCompat.Builder(
this).setContentTitle("Alarm").setSmallIcon(R.drawable.ic_launcher)
.setStyle(new NotificationCompat.BigTextStyle().bigText(msg))
.setContentText(msg);


alamNotificationBuilder.setContentIntent(contentIntent);
alarmNotificationManager.notify(1, alamNotificationBuilder.build());
Log.d("AlarmService", "Notification sent.");
}
}


Output:


Result:
Thus the application alarm clock is developed and tested using android studio.