[英]How to active a Foreground Service using a Mediaplayer Singleton
我在Android中较新,并且有Mediaplayer Singleton,因为我使用的是显示列表的片段,我希望在Mediaplayer Singleton播放时可以激活服务,我尝试使用runOnUiThread,但这只会激活该服务很多次。
这是MyMediaSingleton.java中的Singleton
public class MyMediaSingleton {
MediaPlayer player;
private static volatile MyMediaSingleton instance=null;
private MyMediaSingleton(){
}
public static MyMediaSingleton getInstance(){
if(instance==null){
synchronized (MyMediaSingleton.class){
if(instance==null){
instance=new MyMediaSingleton();
}
}
}
return instance;
}
}
感谢您的耐心等待。
媒体播放器单例课程
public class MyMediaSingleton {
MediaPlayer mp;
private static volatile MyMediaSingleton instance = null;
private MyMediaSingleton () { }
public static MyMediaSingleton getInstance() {
if (instance == null) {
synchronized (MyMediaSingleton .class) {
if (instance == null) {
instance = new MyMediaSingleton ();
}
}
}
return instance;
}
}
活动课
public class MainActivity extends Activity {
private MyMediaSingleton player = getInstance();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void playSound(View view){
if(player.mp==null)
player.mp = MediaPlayer.create(getApplicationContext(), R.raw.sound);
player.mp.start();
//For playing multiple sound using single MediaPlayer do it as:
if(player.mp ==null)
player.mp = new MediaPlayer();
else
player.mp.reset();
String fileName="android.resource://"+getPackageName()+
"/"+ R.raw.sound;
player.mp.setDataSource(getApplicationContext(),Uri.parse(fileName));
player.mp.prepare();
player.mp.start();
}
}
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