Welcome to ANDROID Developer!

Friday, May 23, 2014

DatePickerDialog

Hi Guys!
Today I am going to share about the code of Date Picker in Android.
This class is a widget for selecting a date. The date can be selected by a year, month, and day spinners or a CalendarView. The set of spinners and the calendar view are automatically synchronized. The client can customize whether only the spinners, or only the calendar view, or both to be displayed. Also the minimal and maximal date from which dates to be selected can be customized.
For detail about the Date Picker you can visit the android developer site Date Picker.

So lets start the coding about the date picker android.

activity_main.xml

?
1
2
3
4
5
6
7
<linearlayout android:id="@+id/LinearLayout1" android:layout_height="match_parent" android:layout_width="match_parent" android:orientation="vertical" 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" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools">
 
    <textview android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/hello_world">
 
    <button android:id="@+id/startdatepicker" android:layout_height="wrap_content" android:layout_width="fill_parent" android:text="Start DatePicker">
 
</button></textview></linearlayout>

MainAcivity.java

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
package com.sunil.datepicker;
 
 import java.util.Calendar;
  
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
  
public class MainActivity extends Activity {
   
 private int year, month, day;
 static final int ID_DATEPICKER = 0;
   
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.activity_main);
    
     Button startDatePicker = (Button)findViewById(R.id.startdatepicker);
     startDatePicker.setOnClickListener(new Button.OnClickListener(){
  
   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub
    final Calendar c = Calendar.getInstance();
       year = c.get(Calendar.YEAR);
       month = c.get(Calendar.MONTH);
       day = c.get(Calendar.DAY_OF_MONTH);
       showDialog(ID_DATEPICKER);
   }});
 }
  
 @Override
 protected Dialog onCreateDialog(int id) {
  switch(id){
  case ID_DATEPICKER:
   return new DatePickerDialog(this, dateSetListener, year, month, day);
  default:
   return null;
  }
 }
   
 private DatePickerDialog.OnDateSetListener dateSetListener
   = new DatePickerDialog.OnDateSetListener(){
  
  @Override
  public void onDateSet(android.widget.DatePicker arg0, int arg1,int arg2, int arg3) {
  
      Toast.makeText(getBaseContext(), String.valueOf(arg1) + "/"  + String.valueOf(arg2+1) + "/"  + String.valueOf(arg3),Toast.LENGTH_LONG).show();
     }
  };
}


You can download the source code Date Picker

Custom dialog

Hi Guys!!
Today I am sharing the code about the custom dialog with by using the inflater.
we can make the layout inflate on the view. By help of the Alert Dialog we can create the custom the Alert Dialog .
More about the Alert Dialog you can visit the android developer site Alert Dialog.

So lets start the coding for custom dialog with help of inflater.
 

activity_main.xml

?
1
2
3
4
5
6
7
8
9
<linearlayout android:id="@+id/LinearLayout1" android:layout_height="match_parent" android:layout_width="match_parent" android:orientation="vertical" 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" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools">
 
    <textview android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/hello_world">
 
    <analogclock android:layout_height="wrap_content" android:layout_width="wrap_content">
 
    <button android:id="@+id/idButton" android:layout_height="wrap_content" android:layout_width="fill_parent" android:text="Button">
 
</button></analogclock></textview></linearlayout>

MainActivity.java

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
package com.sunil.customdialog;
 
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
      
    void openCustomDialog(){
     AlertDialog.Builder customDialog = new AlertDialog.Builder(MainActivity.this);
     customDialog.setTitle("Custom Dialog");
     LayoutInflater layoutInflater = (LayoutInflater)getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  View view=layoutInflater.inflate(R.layout.activity_main,null);
   
  Button btn = (Button)view.findViewById(R.id.idButton);
  btn.setOnClickListener(new Button.OnClickListener(){
   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub
    Toast.makeText(getApplicationContext(), "Button Pressed", Toast.LENGTH_LONG).show();
   }});
    
  customDialog.setPositiveButton("OK", new DialogInterface.OnClickListener(){
   @Override
   public void onClick(DialogInterface arg0, int arg1) {
      
   }});
    
  customDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener(){
   @Override
   public void onClick(DialogInterface arg0, int arg1) {
      
   }});
        customDialog.setView(view);
        customDialog.show();
    }
 /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        openCustomDialog();
    }
}

 
 
 You can download the source code Custom Dialog

ListView with multiple choice

Hi Guys!!
Today i am sharing the code of the multiple choice option select in list view.
ListView is a view group that displays a list of scrollable items. The list items are automatically inserted to the list using an Adapter that pulls content from a source such as an array or database query and converts each item result into a view that's placed into the list. 
For more details about the List View visit the Android Developer site List View.

Lets Start the coding now.

activty_main.xml

?
1
2
3
4
5
6
7
8
9
<linearlayout android:id="@+id/LinearLayout1" android:layout_height="match_parent" android:layout_width="match_parent" android:orientation="vertical" 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" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools">
 
    <textview android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/hello_world">
 
    <button android:id="@+id/getchoice" android:layout_height="wrap_content" android:layout_width="fill_parent" android:text="Get Choice">
 
    <listview android:id="@+id/list" android:layout_height="wrap_content" android:layout_width="fill_parent">
 
</listview></button></textview></linearlayout>

MainActivity.java

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
package com.sunil.listview;
 
 import android.app.Activity;
import android.os.Bundle;
import android.util.SparseBooleanArray;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
 import android.widget.Toast;
  
public class MainActivity extends Activity {
  
    ListView myList;
    Button getChoice;
  
   String[] listContent = {
  
            "January",
            "February",
            "March",
            "April",
            "May",
            "June",
            "July",
            "August",
            "September",
            "October",
            "November",
            "December"
  
    };
  
    /** Called when the activity is first created. */
  
    @Override
  
    public void onCreate(Bundle savedInstanceState) {
  
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        myList = (ListView)findViewById(R.id.list);
        getChoice = (Button)findViewById(R.id.getchoice);
  
        ArrayAdapter<string> adapter = new ArrayAdapter<string>(this, android.R.layout.simple_list_item_multiple_choice, listContent);
        myList.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
  
        myList.setAdapter(adapter);
        getChoice.setOnClickListener(new Button.OnClickListener(){
  
 
            @Override
            public void onClick(View v) {
              
                String selected = "";
                int cntChoice = myList.getCount();
  
                SparseBooleanArray sparseBooleanArray = myList.getCheckedItemPositions();
                for(int i = 0; i < cntChoice; i++){
                    if(sparseBooleanArray.get(i)) {
                        selected += myList.getItemAtPosition(i).toString() + "\n";
  
                    }
  
                }
  
                Toast.makeText(MainActivity.this, selected, Toast.LENGTH_LONG).show();
  
            }});
  
    }
  
}
</string></string>

Please download the source code ListView with multiple choice

Start Activity from Broadcast Recevier

Some time we need to start an Activity from Broadcast Receiver..
how can we achieve this i am going to write step by step.

So lets create a small App to do this things 

-------------------------------------------
App Name: BReceiver2Activity
Package Name: com.sunil
Android SDK: Android SDK 2.2 / API 8
-------------------------------------------

MyReceiver.java
  1. package com.sunil;  
  2.   
  3. import android.content.BroadcastReceiver;  
  4. import android.content.Context;  
  5. import android.content.Intent;  
  6. import android.util.Log;  
  7. import android.widget.Toast;  
  8.   
  9. public class MyReceiver extends BroadcastReceiver {  
  10.   
  11.  @Override  
  12.  public void onReceive(Context context, Intent intent) {  
  13.     
  14.   Toast.makeText(context, "MyReceiver Started",   
  15.     Toast.LENGTH_SHORT).show();  
  16.   Log.v("Info Message", "in Broadcast receiver");  
  17.   Intent myIntent=new Intent(context,MyActivity.class);   
  18.   myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  
  19.   context.startActivity(myIntent);  
  20.  }  
  21.   
  22. }  

MyActivity.java
  1. package com.sunil;  
  2.   
  3. import android.app.Activity;  
  4. import android.os.Bundle;  
  5.   
  6. public class MyActivity extends Activity {  
  7.   
  8.  @Override  
  9.  public void onCreate(Bundle savedInstanceState) {  
  10.   super.onCreate(savedInstanceState);  
  11.   setContentView(R.layout.main);  
  12.   
  13.  }  
  14. }  

main.xml
  1. <?xml version="1.0" encoding="utf-8"?>  
  2. <LinearLayout  
  3.  xmlns:android="http://schemas.android.com/apk/res/android"  
  4.  android:orientation="vertical"  
  5.  android:layout_width="fill_parent"  
  6.  android:layout_height="fill_parent"  
  7.  android:weightSum="1">  
  8.  <TextView  
  9.   android:layout_width="fill_parent"  
  10.   android:layout_height="wrap_content"  
  11.   android:text="@string/hello"  
  12.   android:layout_weight="0.14" />  
  13. </LinearLayout>  

AndroidManifest.xml
  1. <?xml version="1.0" encoding="utf-8"?>  
  2. <manifest  
  3.  xmlns:android="http://schemas.android.com/apk/res/android"  
  4.  package="com.sunil"  
  5.  android:versionCode="1"  
  6.  android:versionName="1.0">  
  7.  <uses-sdk android:minSdkVersion="8" />  
  8.   
  9.  <application  
  10.   android:icon="@drawable/icon"  
  11.   android:label="@string/app_name">  
  12.   
  13.   <activity  
  14.    android:enabled="true"  
  15.    android:name=".MyActivity">  
  16.    <intent-filter>  
  17.     <action android:name="com.sunil.MyActivity">  
  18.     </action>  
  19.    </intent-filter>  
  20.   </activity>  
  21.   
  22.   <receiver  
  23.     android:enabled="true"  
  24.     android:name=".MyReceiver">  
  25.     <intent-filter>  
  26.     <action android:name="android.intent.action.BOOT_COMPLETED" />  
  27.     </intent-filter>  
  28.   </receiver>  
  29.   
  30.  </application>  
  31. </manifest>  

Now Reboot Emulator, Activity will appear on start-up.

You can download source code here: BReceiver2Activity

Grid View Demo With Images

GridView is a ViewGroup that displays items in a two-dimensional, scrollable grid.

We are going to create a Grid View to show Images, where we can select each item via click.

so lets create simple app with default activity "GridViewActivity" and put this code inside it.   
  1. package com.sunil;
  2. import android.app.Activity;  
  3. import android.os.Bundle;  
  4. import android.view.View;  
  5. import android.widget.AdapterView;  
  6. import android.widget.GridView;  
  7. import android.widget.TextView;  
  8. import android.widget.Toast;  
  9. import android.widget.AdapterView.OnItemClickListener;  
  10.   
  11. public class GridViewActivity extends Activity {  
  12.       
  13.  GridView gridView;  
  14.    
  15.  static final String[] MOBILE_OS = new String[]{  
  16.   "Android", "iOS", "Windows", "Balckberry",  
  17.  };  
  18.    
  19.     @Override  
  20.     public void onCreate(Bundle savedInstanceState) {  
  21.         super.onCreate(savedInstanceState);  
  22.         setContentView(R.layout.main);  
  23.           
  24.         gridView = (GridView) findViewById(R.id.gridView1);  
  25.           
  26.         gridView.setAdapter(new ImageAdapter(this, MOBILE_OS));  
  27.           
  28.         gridView.setOnItemClickListener(new OnItemClickListener(){  
  29.          public void onItemClick(AdapterView parent, View v,   
  30.            int position, long id){  
  31.           Toast.makeText(getApplicationContext(),  
  32.           ((TextView) v.findViewById(R.id.grid_item_label))  
  33.           .getText(), Toast.LENGTH_SHORT).show();  
  34.          }  
  35.         });  
  36.     }  
  37. }  

ImageAdapter.java
   
  1. package com.sunil;  
  2. import android.content.Context;  
  3. import android.view.LayoutInflater;  
  4. import android.view.View;  
  5. import android.view.ViewGroup;  
  6. import android.widget.BaseAdapter;  
  7. import android.widget.ImageView;  
  8. import android.widget.TextView;  
  9.   
  10. public class ImageAdapter extends BaseAdapter{  
  11.    
  12.    
  13.  private Context context;  
  14.  private final String[] mobileValues;  
  15.    
  16.  public ImageAdapter(Context context, String[]   
  17.    mobileValues){  
  18.   this.context=context;  
  19.   this.mobileValues=mobileValues;  
  20.  }  
  21.    
  22.  public View getView(int position, View convertView,   
  23.    ViewGroup parent){  
  24.   LayoutInflater inflater = (LayoutInflater) context  
  25.     .getSystemService(Context.  
  26.       LAYOUT_INFLATER_SERVICE);  
  27.     
  28.   View gridView;  
  29.   if(convertView == null){  
  30.    gridView = new View(context);  
  31.    gridView = inflater.inflate(  
  32.      R.layout.mobile, null);  
  33.      
  34.    TextView textView = (TextView) gridView.  
  35.      findViewById(R.id.grid_item_label);  
  36.    textView.setText(mobileValues[position]);  
  37.      
  38.    ImageView imageView = (ImageView) gridView.  
  39.      findViewById(  
  40.        R.id.grid_item_image);  
  41.    String mobile = mobileValues[position];  
  42.     
  43.    if(mobile.equals("Android")){  
  44.     imageView.setImageResource(  
  45.       R.drawable.android_logo);  
  46.    }  
  47.    else if(mobile.equals("iOS")){  
  48.     imageView.setImageResource(  
  49.       R.drawable.ios_logo);  
  50.    }  
  51.    else if(mobile.equals("Windows")){  
  52.     imageView.setImageResource(  
  53.       R.drawable.windows_logo);      
  54.    }     
  55.    else if(mobile.equals("BlackBerry")){  
  56.     imageView.setImageResource(  
  57.       R.drawable.ios_logo);  
  58.    }     
  59.   }  
  60.   else{  
  61.    gridView = (View) convertView;  
  62.   }  
  63.   return gridView;  
  64.  }  
  65.   
  66.  @Override  
  67.  public int getCount() {  
  68.   // TODO Auto-generated method stub  
  69.   return mobileValues.length;  
  70.  }  
  71.   
  72.  @Override  
  73.  public Object getItem(int position) {  
  74.   // TODO Auto-generated method stub  
  75.   return null;  
  76.  }  
  77.   
  78.  @Override  
  79.  public long getItemId(int position) {  
  80.   // TODO Auto-generated method stub  
  81.   return 0;  
  82.  }  
  83. }  

main.xml
 
  1. <gridview android:columnwidth="100dp" android:gravity="center" android:id="@+id/gridView1" android:layout_height="fill_parent" android:layout_width="fill_parent" android:numcolumns="1" android:stretchmode="columnWidth" xmlns:android="http://schemas.android.com/apk/res/android">  
  2.  </gridview>  

mobile.xml
  1.   
  2. <linearlayout android:layout_height="wrap_content" android:layout_width="wrap_content" android:orientation="horizontal" android:padding="5dp" xmlns:android="http://schemas.android.com/apk/res/android">  
  3.     
  4.   <imageview android:id="@+id/grid_item_image" android:layout_height="50px" android:layout_marginright="10px" android:layout_width="50px" android:src="@drawable/blackberry_logo">  
  5.   </imageview>  
  6.     
  7.   <textview android:id="@+id/grid_item_label" android:layout_height="wrap_content" android:layout_margintop="5px" android:layout_width="wrap_content" android:text="@+id/label" android:textsize="15px">  
  8.   </textview>     
  9.       
  10. </linearlayout>  

you need to put these icons in res/drawable-mdpi folder or any:

Then our output is:

Android Animation App - Bouncing Ball

So looking for play with animation stuff.. good!! you are on right place  :)
today we are going to learn how to create simple android animation app.
so in this application we will create Background View and Ball programatically which will jump.

let's began the code, first of all we need to create simple android app having single Activity
name is :
BouncingBallActivity.java
  1. package com.mytest;  
  2.   
  3. import android.app.Activity;  
  4. import android.os.Bundle;  
  5. import android.view.View;  
  6.   
  7. public class BouncingBallActivity extends Activity {  
  8.     /** Called when the activity is first created. */  
  9.     @Override  
  10.     public void onCreate(Bundle savedInstanceState) {  
  11.         super.onCreate(savedInstanceState);  
  12.         //setContentView(R.layout.main);  
  13.           
  14.         View bouncingBallView = new BouncingBallView(this);  
  15.         setContentView(bouncingBallView);  
  16.     }  
  17. }  

Now we need to create a View programatically [we will not using any xml file]
here we go..
BouncingBallView.java
view plainprint?
  1.     
  2. package com.mytest;  
  3.     
  4. import android.content.Context;  
  5. import android.graphics.Canvas;  
  6. import android.graphics.Color;  
  7. import android.graphics.Paint;  
  8. import android.graphics.RectF;  
  9. import android.view.KeyEvent;  
  10. import android.view.View;  
  11.      
  12. public class BouncingBallView extends View {  
  13.    private int xMin = 0;          // This view's bounds  
  14.    private int xMax;  
  15.    private int yMin = 0;  
  16.    private int yMax;  
  17.    private float ballRadius = 40; // Ball's radius  
  18.    private float ballX = ballRadius + 20;  // Ball's center (x,y)  
  19.    private float ballY = ballRadius + 40;  
  20.    private float ballSpeedX = 5;  // Ball's speed (x,y)  
  21.    private float ballSpeedY = 3;  
  22.    private RectF ballBounds;      // Needed for Canvas.drawOval  
  23.    private Paint paint;           // The paint (e.g. style, color) used for drawing  
  24.      
  25.    // Constructor  
  26.    public BouncingBallView(Context context) {  
  27.       super(context);  
  28.       ballBounds = new RectF();  
  29.       paint = new Paint();  
  30.         
  31.       //to enable keypad  
  32.       this.setFocusable(true);  
  33.       this.requestFocus();  
  34.    }  
  35.     
  36.    // Called back to draw the view. Also called by invalidate().  
  37.    @Override  
  38.    protected void onDraw(Canvas canvas) {  
  39.       // Draw the ball  
  40.       ballBounds.set(ballX-ballRadius, ballY-ballRadius, ballX+ballRadius, ballY+ballRadius);  
  41.       paint.setColor(Color.GREEN);  
  42.       canvas.drawOval(ballBounds, paint);  
  43.           
  44.       // Update the position of the ball, including collision detection and reaction.  
  45.       update();  
  46.     
  47.       // Delay  
  48.       try {    
  49.          Thread.sleep(60);    
  50.       } catch (InterruptedException e) { }  
  51.         
  52.       invalidate();  // Force a re-draw  
  53.    }  
  54.      
  55.    // Detect collision and update the position of the ball.  
  56.    private void update() {  
  57.       // Get new (x,y) position  
  58.      // ballX += ballSpeedX;  
  59.       ballY += ballSpeedY;  
  60.       // Detect collision and react  
  61.       if (ballX + ballRadius > xMax) {  
  62.          ballSpeedX = -ballSpeedX;  
  63.          ballX = xMax-ballRadius;  
  64.       } else if (ballX - ballRadius < xMin) {  
  65.          ballSpeedX = -ballSpeedX;  
  66.          ballX = xMin+ballRadius;  
  67.       }  
  68.       if (ballY + ballRadius > yMax) {  
  69.          ballSpeedY = -ballSpeedY;  
  70.          ballY = yMax - ballRadius;  
  71.       } else if (ballY - ballRadius < yMin) {  
  72.          ballSpeedY = -ballSpeedY;  
  73.          ballY = yMin + ballRadius;  
  74.       }  
  75.    }  
  76.      
  77.    // Called back when the view is first created or its size changes.  
  78.    @Override  
  79.    public void onSizeChanged(int w, int h, int oldW, int oldH) {  
  80.       // Set the movement bounds for the ball  
  81.       xMax = w-1;  
  82.       yMax = h-1;  
  83.    }  
  84.      
  85.    // key-up event handler  
  86.    @Override  
  87.    public boolean onKeyUp(int keyCode, KeyEvent event) {  
  88.       switch (keyCode) {  
  89.          case KeyEvent.KEYCODE_DPAD_RIGHT: // Increase rightward speed  
  90.             ballSpeedX++;  
  91.             break;  
  92.          case KeyEvent.KEYCODE_DPAD_LEFT:  // Increase leftward speed  
  93.             ballSpeedX--;  
  94.             break;  
  95.          case KeyEvent.KEYCODE_DPAD_UP:    // Increase upward speed  
  96.             ballSpeedY--;  
  97.             break;  
  98.          case KeyEvent.KEYCODE_DPAD_DOWN:  // Increase downward speed  
  99.             ballSpeedY++;  
  100.             break;  
  101.          case KeyEvent.KEYCODE_DPAD_CENTER: // Stop  
  102.             ballSpeedX = 0;  
  103.             ballSpeedY = 0;  
  104.             break;  
  105.          case KeyEvent.KEYCODE_A:    // Zoom in  
  106.             // Max radius is about 90% of half of the smaller dimension  
  107.             float maxRadius = (xMax > yMax) ? yMax / 2 * 0.9f  : xMax / 2 * 0.9f;  
  108.             if (ballRadius < maxRadius) {  
  109.                ballRadius *= 1.05;   // Increase radius by 5%  
  110.             }  
  111.             break;  
  112.          case KeyEvent.KEYCODE_Z:    // Zoom out  
  113.             if (ballRadius > 20) {   // Minimum radius  
  114.                ballRadius *= 0.95;   // Decrease radius by 5%  
  115.             }  
  116.             break;  
  117.       }  
  118.       return true;  // Event handled  
  119.    }  
  120.      
  121.      
  122. }  
at last our manifest file should look like this..
AndroidManifest.xml
  1.     
  2.   
  3. <manifest android:versioncode="1" android:versionname="1.0" package="com.mytest" xmlns:android="http://schemas.android.com/apk/res/android">  
  4.     <uses-sdk android:minsdkversion="8">  
  5.   
  6.     <application android:icon="@drawable/icon" android:label="@string/app_name">  
  7.         <activity android:label="@string/app_name" android:name=".BouncingBallActivity">  
  8.             <intent-filter>  
  9.                 <action android:name="android.intent.action.MAIN">  
  10.                 <category android:name="android.intent.category.LAUNCHER">  
  11.             </category></action></intent-filter>  
  12.         </activity>  
  13.   
  14.     </application>  
  15. </uses-sdk></manifest>  

output is like this