Apply animation on Button

Create four XML files for animation:

/res/anim/anim_alpha.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator">
    <alpha
        android:fromAlpha="1.0"
        android:toAlpha="0.1"
        android:duration="500"
        android:repeatCount="1"
        android:repeatMode="reverse" />
</set>


/res/anim/anim_rotate.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator">
    <rotate
        android:fromDegrees="0"
        android:toDegrees="360"
        android:pivotX="50%"
        android:pivotY="50%"
        android:duration="500"
        android:startOffset="0"
        android:repeatCount="1"
        android:repeatMode="reverse" />
</set>


/res/anim/anim_scale.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator">
    <scale
        android:fromXScale="1.0"
        android:toXScale="3.0"
        android:fromYScale="1.0"
        android:toYScale="3.0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:duration="500"
        android:repeatCount="1"
        android:repeatMode="reverse" />
</set>


/res/anim/anim_translate.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator">
    <translate
        android:fromXDelta="0"
        android:toXDelta="100%p"
        android:duration="500"
        android:repeatCount="1"
        android:repeatMode="reverse"/>
</set>


main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

    <Button
        android:id="@+id/translate"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:text="Translate" />
    <Button
        android:id="@+id/alpha"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:text="Alpha" />
    <Button
        android:id="@+id/scale"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:text="Scale" />
    <Button
        android:id="@+id/rotate"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:text="Rotate" />

</LinearLayout>


Main activity:
package com.exercise.AndroidAnimButtons;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;

public class AndroidAnimButtonsActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        final Animation animTranslate = AnimationUtils.loadAnimation(this, R.anim.anim_translate);
        final Animation animAlpha = AnimationUtils.loadAnimation(this, R.anim.anim_alpha);
        final Animation animScale = AnimationUtils.loadAnimation(this, R.anim.anim_scale);
        final Animation animRotate = AnimationUtils.loadAnimation(this, R.anim.anim_rotate);
       
        Button btnTranslate = (Button)findViewById(R.id.translate);
        Button btnAlpha = (Button)findViewById(R.id.alpha);
        Button btnScale = (Button)findViewById(R.id.scale);
        Button btnRotate = (Button)findViewById(R.id.rotate);
       
        btnTranslate.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    arg0.startAnimation(animTranslate);
   }});
       
        btnAlpha.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    arg0.startAnimation(animAlpha);
   }});
       
        btnScale.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    arg0.startAnimation(animScale);
   }});
       
        btnRotate.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    arg0.startAnimation(animRotate);
   }});
    }
}


Download the files here.

Video View in Adroid with Event Handler

We can Play Video in android with Video View . We can also implement our own event handlers and register with our VideoView using the methods setOnCompletionListener(), setOnPreparedListener() and setOnErrorListener().

Code
AndroidVideoViewActivity.java

package com.exercise.AndroidVideoView;

import android.app.Activity;

import android.media.MediaPlayer;

import android.net.Uri;

import android.os.Bundle;

import android.widget.MediaController;

import android.widget.Toast;

import android.widget.VideoView;

public class AndroidVideoViewActivity extends Activity {

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);

    VideoView myVideoView = (VideoView)findViewById(R.id.videoview);

    String viewSource ="rtsp://v5.cache1.c.youtube.com/CjYLENy73wIaLQklThqIVp_AsxMYESARFEIJbXYtZ29vZ2xlSARSBWluZGV4YIvJo6nmx9DvSww=/0/0/0/video.3gp";

    myVideoView.setVideoURI(Uri.parse(viewSource));

    myVideoView.setMediaController(new MediaController(this));

    myVideoView.setOnCompletionListener(myVideoViewCompletionListener);

    myVideoView.setOnPreparedListener(MyVideoViewPreparedListener);

    myVideoView.setOnErrorListener(myVideoViewErrorListener);

    myVideoView.requestFocus();

    myVideoView.start();

}

MediaPlayer.OnCompletionListener myVideoViewCompletionListener

= new MediaPlayer.OnCompletionListener(){

  @Override

  public void onCompletion(MediaPlayer arg0) {

   Toast.makeText(AndroidVideoViewActivity.this,

     "End of Video",

     Toast.LENGTH_LONG).show();

  }};

  

 MediaPlayer.OnPreparedListener MyVideoViewPreparedListener

 = new MediaPlayer.OnPreparedListener(){

  @Override

  public void onPrepared(MediaPlayer arg0) {

   Toast.makeText(AndroidVideoViewActivity.this,

     "Media file is loaded and ready to go",

     Toast.LENGTH_LONG).show();

   

  }};

  

 MediaPlayer.OnErrorListener myVideoViewErrorListener

 = new MediaPlayer.OnErrorListener(){

  @Override

  public boolean onError(MediaPlayer arg0, int arg1, int arg2) {

   Toast.makeText(AndroidVideoViewActivity.this,

     "Error!!!",

     Toast.LENGTH_LONG).show();

   return true;

  }};

}

Layout, main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

/>

<VideoView

android:id="@+id/videoview"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

/>

</LinearLayout>

Download the Source here