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| [
package com.paad.mediaplayer;
import java.io.IOException;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.Bitmap;
import android.media.AudioManager;
import android.media.AudioManager.OnAudioFocusChangeListener;
import android.media.MediaMetadataRetriever;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.RemoteControlClient;
import android.media.RemoteControlClient.MetadataEditor;
import android.media.audiofx.BassBoost;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
@SuppressLint("NewApi")
public class AudioPlayerActivity extends Activity {
static final String TAG = "PlayerActivity";
//Bitmap pochette = audio.png;
Bitmap pochette = null;
private ActivityMediaControlReceiver activityMediaControlReceiver;
private MediaPlayer mediaPlayer;
private RemoteControlClient myRemoteControlClient;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.audioplayer);
/**
* Listing 15-6: Setting the volume control stream for an Activity
*/
setVolumeControlStream(AudioManager.STREAM_MUSIC);
registerRemoteControlClient();
configureAudio();
Button buttonPlay = (Button)findViewById(R.id.buttonPlay);
buttonPlay.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
play();
}
});
Button buttonBass = (Button)findViewById(R.id.buttonBassBoost);
buttonBass.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
bassBoost();
}
});
Button buttonPause = (Button)findViewById(R.id.buttonPause);
buttonPause.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
pause();
}
});
Button buttonStop = (Button)findViewById(R.id.buttonStop);
buttonStop.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
stop();
}
});
}
/**
* Listing 15-9: Media button press Broadcast Receiver implementation
*/
public class ActivityMediaControlReceiver extends BroadcastReceiver {
public ActivityMediaControlReceiver() {
// TODO Auto-generated constructor stub
super ();
Log.d("BROADReceiver","broad");
}
@Override
public void onReceive(Context context, Intent intent) {
Log.d("ONReceiver", intent.toString());
if (MediaControlReceiver.ACTION_MEDIA_BUTTON.equals(
intent.getAction())) {
KeyEvent event =
(KeyEvent)intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
Log.d("Receiver", event.toString());
switch (event.getKeyCode()) {
case (KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE) :
if (mediaPlayer.isPlaying())
pause();
else
play();
break;
case (KeyEvent.KEYCODE_MEDIA_PLAY) :
play(); break;
case (KeyEvent.KEYCODE_MEDIA_PAUSE) :
pause(); break;
case (KeyEvent.KEYCODE_MEDIA_NEXT) :
skip(); break;
case (KeyEvent.KEYCODE_MEDIA_PREVIOUS) :
previous(); break;
case (KeyEvent.KEYCODE_MEDIA_STOP) :
stop(); break;
default: break;
}
}
}
}
@Override
protected void onResume() {
super.onResume();
/**
* Listing 15-10: Media button press Receiver manifest declaration
*/
Log.d("RESUME", "resume");
// Register the Media Button Event Receiver to
// listen for media button presses.
AudioManager am = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
ComponentName component = new ComponentName(this, MediaControlReceiver.class);
am.registerMediaButtonEventReceiver(component);
// Register a local Intent Receiver that receives media button
// presses from the Receiver registered in the manifest.
activityMediaControlReceiver = new ActivityMediaControlReceiver();
IntentFilter filter =
new IntentFilter(MediaControlReceiver.ACTION_MEDIA_BUTTON);
registerReceiver(activityMediaControlReceiver, filter);
//
IntentFilter noiseFilter = new IntentFilter(AudioManager.ACTION_AUDIO_BECOMING_NOISY);
registerReceiver(new NoisyAudioStreamReceiver(), noiseFilter);
}
public void play() {
/**
* Listing 15-11: Requesting the audio focus
*/
Log.d("PLAY", "play");
AudioManager am = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
// Request audio focus for playback
int result = am.requestAudioFocus(focusChangeListener,
// Use the music stream.
AudioManager.STREAM_MUSIC,
// Request permanent focus.
AudioManager.AUDIOFOCUS_GAIN);
if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
mediaPlayer.start();
}
if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) myRemoteControlClient.setPlaybackState(RemoteControlClient.PLAYSTATE_PLAYING);
//if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) myRemoteControlClient.setPlaybackState(RemoteControlClient.PLAYSTATE_BUFFERING);
}
/**
* Listing 15-12: Responding to the loss of audio focus
*/
private OnAudioFocusChangeListener focusChangeListener =
new OnAudioFocusChangeListener() {
public void onAudioFocusChange(int focusChange) {
AudioManager am =
(AudioManager)getSystemService(Context.AUDIO_SERVICE);
switch (focusChange) {
case (AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK) :
// Lower the volume while ducking.
mediaPlayer.setVolume(0.2f, 0.2f);
break;
case (AudioManager.AUDIOFOCUS_LOSS_TRANSIENT) :
pause();
break;
case (AudioManager.AUDIOFOCUS_LOSS) :
stop();
ComponentName component =
new ComponentName(AudioPlayerActivity.this,
MediaControlReceiver.class);
am.unregisterMediaButtonEventReceiver(component);
break;
case (AudioManager.AUDIOFOCUS_GAIN) :
// Return the volume to normal and resume if paused.
mediaPlayer.setVolume(1f, 1f);
mediaPlayer.start();
break;
default: break;
}
}
};
public void stop() {
mediaPlayer.stop();
myRemoteControlClient.setPlaybackState(RemoteControlClient.PLAYSTATE_STOPPED);
/**
* Listing 15-13: Abandoning audio focus
*/
Log.d("STOP", "stop");
AudioManager am = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
am.abandonAudioFocus(focusChangeListener);
}
/**
* Listing 15-14: Pausing output when the headset is disconnected
*/
private class NoisyAudioStreamReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (AudioManager.ACTION_AUDIO_BECOMING_NOISY.equals
(intent.getAction())) {
pause();
}
}
}
private void registerRemoteControlClient() {
/**
* Listing 15-15: Registering a Remote Control Client
*/
AudioManager am =
(AudioManager)getSystemService(Context.AUDIO_SERVICE);
// Create a Pending Intent that will broadcast the
// media button press action. Set the target component
// to your Broadcast Receiver.
Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON);
ComponentName component =
new ComponentName(this, MediaControlReceiver.class);
mediaButtonIntent.setComponent(component);
PendingIntent mediaPendingIntent =
PendingIntent.getBroadcast(getApplicationContext(), 0,
mediaButtonIntent, 0);
// Create a new Remote Control Client using the
// Pending Intent and register it with the
// Audio Manager
myRemoteControlClient =
new RemoteControlClient(mediaPendingIntent);
am.registerRemoteControlClient(myRemoteControlClient);
/**
* Listing 15-16: Configuring the Remote Control Client playback controls
*/
myRemoteControlClient.setTransportControlFlags(
RemoteControlClient.FLAG_KEY_MEDIA_PLAY|
RemoteControlClient.FLAG_KEY_MEDIA_PLAY_PAUSE|
RemoteControlClient.FLAG_KEY_MEDIA_REWIND|
RemoteControlClient.FLAG_KEY_MEDIA_FAST_FORWARD |
RemoteControlClient.FLAG_KEY_MEDIA_STOP);
}
private void setRemoteControlMetadata(Bitmap artwork,
String album, String artist, long trackNumber) {
/**
* Listing 15-17: Applying changes to the Remote Control Client metadata
*/
MetadataEditor editor = myRemoteControlClient.editMetadata(false);
editor.putBitmap(MetadataEditor.BITMAP_KEY_ARTWORK, artwork);
editor.putString(MediaMetadataRetriever.METADATA_KEY_ALBUM, album);
editor.putString(MediaMetadataRetriever.METADATA_KEY_ARTIST, artist);
editor.putLong(MediaMetadataRetriever.METADATA_KEY_CD_TRACK_NUMBER,
trackNumber);
editor.apply();
}
private void bassBoost() {
/**
* Listing 15-22: Applying audio effects
*/
int sessionId = mediaPlayer.getAudioSessionId();
short boostStrength = 500;
int priority = 0;
BassBoost bassBoost = new BassBoost (priority, sessionId);
bassBoost.setStrength(boostStrength);
bassBoost.setEnabled(true);
}
private void configureAudio() {
try {
mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource("/sdcard/test.mp3");
mediaPlayer.prepare();
// TODO setRemoteControlMetadata();
setRemoteControlMetadata(pochette,"Sleep Away","Bobo Acri", 320);
mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
AudioManager am = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
am.abandonAudioFocus(focusChangeListener);
}
});
} catch (IllegalArgumentException e) {
Log.d(TAG, "Illegal Argument Exception: " + e.getMessage());
} catch (SecurityException e) {
Log.d(TAG, "Security Exception: " + e.getMessage());
} catch (IllegalStateException e) {
Log.d(TAG, "Illegal State Exception: " + e.getMessage());
} catch (IOException e) {
Log.d(TAG, "IO Exception: " + e.getMessage());
}
}
public void pause() {
mediaPlayer.pause();
myRemoteControlClient.setPlaybackState(RemoteControlClient.PLAYSTATE_PAUSED);
Log.d("PAUSE", "pause");
}
public void skip() {
// TODO Move to the next audio file.
// TODO Use setRemoteControlMetadata to update the remote control metadata.
}
public void previous() {
// TODO Move to the previous audio file.
// TODO Use setRemoteControlMetadata to update the remote control metadata.
}
}
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