安卓的MediaController播放/暂停按钮和搜索栏不刷新 [英] Android MediaController Play/Pause button and Seekbar doesn't Refresh

问题描述

我使用MediaController.MediaPlayerControl为了显示的MediaController在我的自定义视图的底部，但我不能让它正常工作。当我播放音乐的第一次那么就应该暂停按钮可见，但取而代之的是戏，当我preSS的按钮，然后在音乐的正确暂停，状态保持不变，之后它的正常工作。此外，当我玩下一首歌曲，老的MediaController部件被重叠的新的。有时进度/搜索，而音乐播放栏不刷新。它只是更新自己的东西时，对的MediaController是pressed（播放/暂停，前进，等等）。

我发现这些问题，类似于我的，但我不认为他们有将解决我的问题的答案。

1. <一个href="http://stackoverflow.com/questions/11682680/android-mediacontroller-play-pause-controls-not-refresh-properly">Android的MediaController播放暂停控制不正确刷新
2. <一个href="http://stackoverflow.com/questions/12011631/android-mediacontroller-seekbar-not-refreshing">Android的MediaController搜索栏没有刷新
3. <一个href="http://stackoverflow.com/questions/15582818/android-videoview-playback-controls-show-play-initially-instead-of-pause-eve">Android VideoView播放控件显示＆QUOT;播放＆QUOT;最初，而不是＆QUOT;暂停＆QUOT;即使文件已在播放

这是我如何初始化控制器：

 私人无效setController（）
{
    控制器=新MusicController（本）;

    controller.set prevNextListeners（新View.OnClickListener（）{
          @覆盖
          公共无效的onClick（视图v）{
            playNext（）;
          }
        }，新View.OnClickListener（）{
          @覆盖
          公共无效的onClick（视图v）{
            玩preV（）;
          }
        }）;

    controller.setMediaPlayer（本）;
    controller.setAnchorView（findViewById（R.id.song_list））;
    controller.setEnabled（真正的）;
}
 

这是我怎么显示控制器：

 公共无效playMusic（）
{
        musicSrv.playSong（）; //播放歌曲的服务
        setController（）;
        controller.show（0）;
        controller.requestFocus（）;
}
 

解决方案

我有完全相同这个问题。不知道你是否还需要帮助，但我想我反正发布。对于后人，你下面的<一个href="http://$c$c.tutsplus.com/tutorials/create-a-music-player-on-android-project-setup--mobile-22764">this教程？

一，简单的问题：你得到你的控制，因为重复调用的多个实例 setController（）。你的函数的第一行更改为：

 如果（控制== NULL）控制器=新MusicController（本）;
 

至于播放按钮失灵，我的认为的，那是因为你展示它之前的音乐播放器一直是prepared（免责声明：我是一个新手到Android自己，以下是我已经发现有工作的事情）。

1. 设置广播从你的音乐播放服务，通知你的音乐控制活动时musicplayer已经prepared。追加以下功能的音乐播放服务，广播意图：

     @覆盖
   公共无效于prepared（MusicPlayer播放器）{
       //做一些其他的东西...
   
       //广播意图的活动，让它知道媒体播放器已经prepared
       热衷于preparedIntent =新的意向书（MEDIA_PLAYER_ prePARED）;
       LocalBroadcastManager.getInstance（本）.sendBroadcast（上preparedIntent）;
   }
    

2. 设置的广播接收器在你的音乐控制活动由服务接收意向广播。添加下面的类到你的活动：

     //广播接收器，以确定何时音乐播放器一直是prepared
   在prepareReceiver =新的BroadcastReceiver私人的BroadcastReceiver（）{
   @覆盖
   公共无效的onReceive（上下文C，意图我）{
       //当音乐播放器一直是prepared，显示控制器
       controller.show（0）;
       }
   };
    

3. 填写您的接收器在您的活动的 onResume（）方法：

     //设置接收器上的$ P $媒体播放器ppared广播
   LocalBroadcastManager.getInstance（本）.registerReceiver（上prepareReceiver，
           新的IntentFilter（MEDIA_PLAYER_ prePARED））;
    

4. 根据您的code中的结构，你就必须做一些常规整理起来。在我的code，我只叫 setController（）两次：从的onCreate（）和 onResume（）方法在我的活动。我也只有叫 controller.show（0）从我的广播接收器，和我的 onResume（）方法。

I am using MediaController.MediaPlayerControl in order to display a MediaController at the bottom of my Custom View but I can't get it to work properly. When I play music for first time then there should be pause button visible but instead there is play and when I press that button then the music is paused correctly and state remains the same and after that its working properly. Also when I play next song, the old MediaController widget gets overlapped with the new one. And sometimes the progress/seek bar doesn't refresh while the music is playing. It just updates itself when something on the MediaController is pressed (Play/Pause, forward, etc).

I found these questions similar to mine but I don't think the answers they got will solve my problem.

1. Android mediacontroller Play Pause controls not refresh properly
2. Android MediaController seekbar not refreshing
3. Android VideoView Playback Controls Show "Play" Initially Instead of "Pause" Even Though File is Already Playing

This is how I initialize the controller:

private void setController()
{
    controller = new MusicController(this);

    controller.setPrevNextListeners(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
            playNext();
          }
        }, new View.OnClickListener() {
          @Override
          public void onClick(View v) {
            playPrev();
          }
        });

    controller.setMediaPlayer(this);
    controller.setAnchorView(findViewById(R.id.song_list));
    controller.setEnabled(true);
}

This is how I show controller:

public void playMusic()
{
        musicSrv.playSong(); //Play song in a service
        setController();
        controller.show(0);
        controller.requestFocus();
}

解决方案

I had exactly this problem. Don't know if you still need help, but I thought I'd post anyway. For posterity, are you following this tutorial?

First, the easy problem: you're getting multiple instances of your controls because of repeated calls to setController(). Change the first line of your function to:

if (controller == null) controller = new MusicController(this);

With regards to the play button malfunctioning, I believe it's because you're showing it before the music player has been prepared (disclaimer: I'm a newbie to Android myself, and the following are the things I've found to have worked).

1. Set up a broadcast from your music-playing service to notify your music-controlling activity when the musicplayer has been prepared. Append the following function in your music-playing service to broadcast intent:

   @Override
   public void onPrepared(MusicPlayer player) {
       // Do some other stuff...
   
       // Broadcast intent to activity to let it know the media player has been prepared
       Intent onPreparedIntent = new Intent("MEDIA_PLAYER_PREPARED");
       LocalBroadcastManager.getInstance(this).sendBroadcast(onPreparedIntent);
   }
   

2. Set up a broadcast receiver in your music-controlling activity to receive the intent broadcast by your service. Add the following class to your activity:

   // Broadcast receiver to determine when music player has been prepared
   private BroadcastReceiver onPrepareReceiver = new BroadcastReceiver() {
   @Override
   public void onReceive(Context c, Intent i) {
       // When music player has been prepared, show controller
       controller.show(0);
       }
   };
   

3. Register your receiver in your activity's onResume() method:

   // Set up receiver for media player onPrepared broadcast
   LocalBroadcastManager.getInstance(this).registerReceiver(onPrepareReceiver,
           new IntentFilter("MEDIA_PLAYER_PREPARED"));
   

4. Depending on the structure of your code, you'll have to do some general tidying up. In my code, I've only called setController() twice: from the onCreate() and onResume() methods in my activity. I also only call controller.show(0) from my broadcast receiver, and my onResume() method.

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