Using BackgroundAudioServiceBinder : Audio « Media « Android

1. Android
2. Media
3. Audio

Using BackgroundAudioServiceBinder

   

package app.test;

import android.app.Activity;
import android.app.Service;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Binder;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

class BackgroundAudioService extends Service implements OnCompletionListener {
  MediaPlayer mediaPlayer;

  public class BackgroundAudioServiceBinder extends Binder {
    BackgroundAudioService getService() {
      return BackgroundAudioService.this;
    }
  }

  private final IBinder basBinder = new BackgroundAudioServiceBinder();

  @Override
  public IBinder onBind(Intent intent) {
    return basBinder;
  }

  public void haveFun() {
    if (mediaPlayer.isPlaying()) {
      mediaPlayer.seekTo(mediaPlayer.getCurrentPosition() - 2500);
    }
  }

  @Override
  public void onCreate() {
    mediaPlayer = MediaPlayer.create(this, R.raw.test);// raw/test.mp3
    mediaPlayer.setOnCompletionListener(this);
  }

  @Override
  public int onStartCommand(Intent intent, int flags, int startId) {
    Log.v("PLAYERSERVICE", "onStartCommand");

    if (!mediaPlayer.isPlaying()) {
      mediaPlayer.start();
    }
    return START_STICKY;
  }

  public void onDestroy() {
    if (mediaPlayer.isPlaying()) {
      mediaPlayer.stop();
    }
    mediaPlayer.release();
    Log.v("SIMPLESERVICE", "onDestroy");
  }

  public void onCompletion(MediaPlayer _mediaPlayer) {
    stopSelf();
  }
}

public class Test extends Activity implements OnClickListener {
  private BackgroundAudioService baService;
  Button startPlaybackButton, stopPlaybackButton, haveFunButton;
  Intent playbackServiceIntent;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    startPlaybackButton = (Button) this
        .findViewById(R.id.StartPlaybackButton);
    stopPlaybackButton = (Button) this
        .findViewById(R.id.StopPlaybackButton);
    haveFunButton = (Button) this.findViewById(R.id.HaveFunButton);

    startPlaybackButton.setOnClickListener(this);
    stopPlaybackButton.setOnClickListener(this);
    haveFunButton.setOnClickListener(this);

    playbackServiceIntent = new Intent(this, BackgroundAudioService.class);
  }

  public void onClick(View v) {
    if (v == startPlaybackButton) {
      startService(playbackServiceIntent);
      bindService(playbackServiceIntent, serviceConnection,
          Context.BIND_AUTO_CREATE);
    } else if (v == stopPlaybackButton) {
      unbindService(serviceConnection);
      stopService(playbackServiceIntent);
    } else if (v == haveFunButton) {
      baService.haveFun();
    }
  }

  private ServiceConnection serviceConnection = new ServiceConnection() {

    public void onServiceConnected(ComponentName className, IBinder baBinder) {
      baService = ((BackgroundAudioService.BackgroundAudioServiceBinder) baBinder)
          .getService();
    }

    public void onServiceDisconnected(ComponentName className) {
      baService = null;
    }
  };
}


//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="Background Audio Player"
        />
   <Button android:text="Start Playback" android:id="@+id/StartPlaybackButton" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
   <Button android:text="Stop Playback" android:id="@+id/StopPlaybackButton" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
   <Button android:text="Have Fun" android:id="@+id/HaveFunButton" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
</LinearLayout>

   
    
    
  

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