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使用服務在後臺播放音頻文件。MediaPlayer的SetOnCompletionListener不工作
這是我的PreviewServices類。
package com.hungama.myplay.activity;
import java.io.IOException;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnBufferingUpdateListener;
import android.media.MediaPlayer.OnCompletionListener;
import android.net.Uri;
import android.os.Binder;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.widget.MediaController;
import android.widget.Toast;
public class PreviewServices extends Service {
private static final String TAG = "PreviewServices";
public static MediaPlayer player;
protected DataManager dataManager = DataManager.getInstance();
String song_uri, url;
private IBinder myBinder;
private boolean isplaying;
@Override
public IBinder onBind(Intent intent) {
return null;
}
public class MyBinder extends Binder {
PreviewServices getService() {
return PreviewServices.this;
}
}
@Override
public void onCreate() {
Log.d(TAG, "onCreate " + song_uri);
}
@Override
public void onDestroy() {
player.stop();
}
public void onPause() {
player.pause();
}
public double duration() {
return player.getDuration();
}
public void onStart(Intent intent, int startid) {
Bundle b = intent.getExtras();
song_uri = b.getString("song_uri");
Uri path = Uri.parse(song_uri);
player = MediaPlayer.create(this, path);
player.setLooping(false); // Set looping
player.start();
/*player.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
Log.d("song is completed","song is not playing now");
dataManager.setPreview_play(true);
}
});
*/
}
}
My PreviewServices is working fine,
in My Activity i want to show a message when my song will complete.
m using this code for this purpose.
PreviewServices preview=new PreviewServices();
MusicScreen.this.preview.player.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
Log.d("song is complete","song complete");
}
});
我不知道Ÿ它拋出空指針異常此行
MusicScreen.this.preview.player.setOnCompletionListener（新OnCompletionListener（）
請建議我在哪裏的問題。
在此先感謝。
拉夫古普塔