Question

我想按照以下规则播放和停止默认声音：

如果没有播放声音，请在10秒内播放。
如果声音正在播放，请将其停止并在第一个位置播放。

基于以上规则，我设计了如下函数：

public MediaPlayer mp =null;
public void playDefaultSound(){
   Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
   mp = MediaPlayer.create(getApplicationContext(), notification);
   try {
       if (mp.isPlaying()) {
       mp.stop();
       mp.release();
       mp = MediaPlayer.create(getApplicationContext(), notification);
       }
       mp.start();
       Handler handler = new Handler();
       handler.postDelayed(new Runnable() {
       public void run() {
            mp.stop();
            mp.release();
          }
       }, 10000);
       } catch (Exception e) {
       e.printStackTrace();
       }
}

但是有时候我仍然会听两个声音正在播放（如果是第一个声音播放，我再次调用playDefaultSound（）函数）。您认为删除mp = MediaPlayer.create(getApplicationContext(), notification);以下mp.release()是否正确？我怎样才能纠正这些规则以满足这些规则？谢谢大家

Answer 1

final MediaPlayer mp = new MediaPlayer();   
public void playDefaultSound(){
       Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
       try {
           if (mp != null && mp.isPlaying()) {
               mp.seekTo(0);
           } else {
               mp.reset();
               mp.setDataSource(getApplicationNotification(), notification);
               mp.start();
               Handler handler = new Handler();
               handler.postDelayed(new Runnable() {
                   public void run() {
                       mp.stop();
                       mp.release();
                   }
               }, 10000);
       } catch (Exception e) {
           e.printStackTrace();
       }
    }
P.S. - Always see the state diagram or lifecycle of things whenever stuck.

Ref : [Android Media Player State Diagram][1]


  [1]: https://developer.android.com/reference/android/media/MediaPlayer.html#StateDiagram "MediaPlayer State Diagram"

如何在Android中自动播放/停止默认声音？

1 个答案: