Audio Player in android

* Live Audio streaming:*

This example has been prepared to stream any audio file from specific URL, and when I have been created this example, I used Android 2.2.
In this sample, I have used one activity, is implemented four interfaces, again. These are:
1. OnClickListener : onClick() method is used, when one of the button has been pushed.
2. OnTouchListener : onTouch() method is used for seeking audio.
3. OnCompletionListener : To set enable of  the buttons, overriden onCompletion() method is just used.
4. OnBufferingUpdateListener : onBufferingUpdate() method is used to update secondary progress of the seekBar instance.


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"

    android:background="@android:color/darker_gray">

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="@string/hello"

        android:textColor="@android:color/black"/>

    <LinearLayout

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_marginTop="5dp"

        android:gravity="center_horizontal"

        android:orientation="horizontal" >

        <Button

            android:id="@+id/btn_play"

            android:layout_width="90dp"

            android:layout_height="wrap_content"

            android:text="play" >

        </Button>

        <Button

            android:id="@+id/btn_pause"

            android:layout_width="90dp"

            android:layout_height="wrap_content"

            android:text="pause" >

        </Button>

        <Button

            android:id="@+id/btn_stop"

            android:layout_width="90dp"

            android:layout_height="wrap_content"

            android:text="stop" >

        </Button>

    </LinearLayout>

    <SeekBar

        android:id="@+id/seekBar"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_margin="3dp" >

    </SeekBar>

</LinearLayout>

 StreamAudioFromUrlSampleActivity:

import android.app.Activity;

import android.media.MediaPlayer;

import android.media.MediaPlayer.OnBufferingUpdateListener;

import android.media.MediaPlayer.OnCompletionListener;

import android.os.Bundle;

import android.os.Handler;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.View.OnTouchListener;

import android.widget.Button;

import android.widget.SeekBar; 

public class StreamAudioFromUrlSampleActivity extends Activity implements OnClickListener, OnTouchListener, OnCompletionListener, OnBufferingUpdateListener{

       private Button btn_play,

       btn_pause,

       btn_stop;

       private SeekBar seekBar;

       private MediaPlayer mediaPlayer;

       private int lengthOfAudio;

       private final String URL = "AudioUrl";

       private final Handler handler = new Handler();

       private final Runnable r = new Runnable()

       {     

              @Override

              public void run() {

                     updateSeekProgress();                                 

              }

       };

       @Override

       public void onCreate(Bundle savedInstanceState)

       {

              super.onCreate(savedInstanceState);

              setContentView(R.layout.main);

              initialize_Controls();

       }

       private void initialize_Controls()

       {

              btn_play = (Button)findViewById(R.id.btn_play);

              btn_play.setOnClickListener(this);

              btn_pause = (Button)findViewById(R.id.btn_pause);

              btn_pause.setOnClickListener(this);

              btn_pause.setEnabled(false);

              btn_stop = (Button)findViewById(R.id.btn_stop);

              btn_stop.setOnClickListener(this);

              btn_stop.setEnabled(false);

              seekBar = (SeekBar)findViewById(R.id.seekBar);

              seekBar.setOnTouchListener(this);

              mediaPlayer = new MediaPlayer();

              mediaPlayer.setOnBufferingUpdateListener(this);

              mediaPlayer.setOnCompletionListener(this);

       }

       @Override

       public void onBufferingUpdate(MediaPlayer mediaPlayer, int percent)

       {

              seekBar.setSecondaryProgress(percent);

       }

       @Override

       public void onCompletion(MediaPlayer mp)

       {

              btn_play.setEnabled(true);

              btn_pause.setEnabled(false);

              btn_stop.setEnabled(false);

       }

       @Override

       public boolean onTouch(View v, MotionEvent event)

       {

              if (mediaPlayer.isPlaying())

              {

                     SeekBar tmpSeekBar = (SeekBar)v;

                     mediaPlayer.seekTo((lengthOfAudio / 100) * tmpSeekBar.getProgress() );

              }

              return false;

       }

       @Override

       public void onClick(View view)

       {

              try

              {                         

                     mediaPlayer.setDataSource(URL);

                     mediaPlayer.prepare();

                     lengthOfAudio = mediaPlayer.getDuration();                   

             

              }

              catch (Exception e)

              {

                     //Log.e("Error", e.getMessage());

              }

              switch (view.getId())

              {

              case R.id.btn_play:              

                     playAudio();

                     break;

              case R.id.btn_pause:

                     pauseAudio();

                     break;

              case R.id.btn_stop:

                     stopAudio();

                     break;

              default:

                     break;

              }

              updateSeekProgress();

       }

       private void updateSeekProgress()

       {

              if (mediaPlayer.isPlaying())

              {

                     seekBar.setProgress((int)(((float)mediaPlayer.getCurrentPosition() / lengthOfAudio) * 100));

                     handler.postDelayed(r, 1000);

              }

       }

       private void stopAudio()

       {

              if(mediaPlayer!=null)

              {

                     mediaPlayer.stop();

              }

              btn_play.setEnabled(true);

              btn_pause.setEnabled(false);

              btn_stop.setEnabled(false);

              seekBar.setProgress(0);

       }

       private void pauseAudio()

       {

              if(mediaPlayer!=null)

              {

                     mediaPlayer.pause();

              }

              btn_play.setEnabled(true);

              btn_pause.setEnabled(false);

       }

       private void playAudio()

       {

              if(mediaPlayer!=null)

              {

                     mediaPlayer.start();

              }            

              btn_play.setEnabled(false);

              btn_pause.setEnabled(true);

              btn_stop.setEnabled(true);

       }

}

* Stream Audio from Resources:  Put audio.mp3 file in raw folder of your project.*

Main.xml

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

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

    android:id="@+id/main"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <TextView

        android:id="@+id/txt"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="@string/hello" />

    <Button

        android:id="@+id/btn_resource"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_below="@id/txt"

        android:text="@string/resource" >

    </Button>

    <LinearLayout

        android:id="@+id/mediaController"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:orientation="vertical" >

    </LinearLayout>

</RelativeLayout>

StreamAudioFromRecourcesSampleActivity:

import java.io.IOException;

import android.app.Activity;

import android.media.MediaPlayer;

import android.media.MediaPlayer.OnCompletionListener;

import android.media.MediaPlayer.OnPreparedListener;

import android.os.Bundle;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.View.OnTouchListener;

import android.widget.Button;

import android.widget.MediaController;

import android.widget.MediaController.MediaPlayerControl;

import android.widget.RelativeLayout;

public class StreamAudioFromRecourcesSampleActivity extends Activity implements MediaPlayerControl, OnClickListener, OnCompletionListener, OnPreparedListener, OnTouchListener {

    private RelativeLayout rl;

       private Button btn_resource;

    private MediaPlayer mp;

    private MediaController mc;

       private final int AUDIO = R.raw.audio;  

       private boolean isPlayed = false;

      

      

    @Override

    public void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);       

       

        init();

    }

       private void init() {

              // linear layout

              rl = (RelativeLayout)findViewById(R.id.main);

              rl.setOnTouchListener(this); // if touch the screen when playing the audio,

                                                               // the MediaController will be shown.

             

              // play audio button for resource audio

              btn_resource = (Button)findViewById(R.id.btn_resource);

              btn_resource.setOnClickListener(this);

             

              // media player

              mp = new MediaPlayer();

              mp.setOnCompletionListener(this);

              mp.setOnPreparedListener(this);

             

              // madia controller

              mc = new MediaController(this);

              mc.setAnchorView(findViewById(R.id.mediaController));

              mc.setMediaPlayer(this);         

             

             

       }

       private void playMedia() throws IllegalStateException, IOException

       {

              if (isPlayed)

              {                   

                     start();

              }

              else

              {

                     mp.setDataSource(getResources().openRawResourceFd(AUDIO).getFileDescriptor());

                     mp.prepare();

              }

       }

      

       @Override

       public void onClick(View v)

       {

              try

              {                   

                     playMedia();

                     setButtonEnabled(false);

              }

              catch (Exception e)

              {

                     e.printStackTrace();

              }

       }

         @Override

       public void onPrepared(MediaPlayer mp)

       {

              mp.start();

              mc.show();

              isPlayed = false;

       }

      

       @Override

       public void onCompletion(MediaPlayer arg0)

       {

              setButtonEnabled(true);

              isPlayed = true;

              mc.show();

       }

      

       private void setButtonEnabled(boolean b)

       {

              // when playing, not to push button again

              btn_resource.setEnabled(b);      

       }

       @Override

       public boolean onTouch(View v, MotionEvent event)

       {

              if (mc != null)

              {

                     mc.show();

              }

              return false;

       }

       @Override

       public boolean canPause() {return true;  }

       @Override

       public boolean canSeekBackward() {return false; }

       @Override

       public boolean canSeekForward() {return false;}

       @Override

       public int getBufferPercentage()

       {

              int percentage = (mp.getCurrentPosition() * 100) / mp.getDuration();

              return percentage;

       }

       @Override

       public int getCurrentPosition() { return mp.getCurrentPosition();   }

       @Override

       public int getDuration() {return mp.getDuration();}

       @Override

       public boolean isPlaying() {return mp.isPlaying();}

       @Override

       public void pause() {mp.pause();  }

       @Override

       public void seekTo(int pos) {mp.seekTo(pos);}

       @Override

       public void start() {mp.start();mc.show();}

      

       @Override

    protected void onDestroy()

       {

        super.onDestroy();

        mp.stop();

        mp.release();

    }

}