Android 4.4系统 - 播放默认的音乐播放器 [英] Android 4.4 - Play default music player

问题描述

谁能告诉我这是为什么不工作的奇巧了，如何解决呢？

 私人意图的球员;
    玩家=新意​​图（Intent.ACTION_MEDIA_BUTTON）;
    同步（本）{
        player.putExtra（Intent.EXTRA_KEY_EVENT，新的KeyEvent（KeyEvent.ACTION_DOWN，KeyEvent.KEY code_MEDIA_PLAY））;
        sendOrderedBroadcast（播放器，NULL）;        player.putExtra（Intent.EXTRA_KEY_EVENT，新的KeyEvent（KeyEvent.ACTION_UP，KeyEvent.KEY code_MEDIA_PLAY））;
        sendOrderedBroadcast（播放器，NULL）;
    }
 

解决方案

有在被专为此目的创建API级别19新方法AudioManager.dispatchMediaKeyEvent（KeyEvent）方法。

<一个href=\"http://developer.android.com/reference/android/media/AudioManager.html#dispatchMediaKeyEvent(android.view.KeyEvent)\" rel=\"nofollow\">http://developer.android.com/reference/android/media/AudioManager.html#dispatchMediaKeyEvent(android.view.KeyEvent)

这code适用于奇巧：

  AudioManager上午=（AudioManager）context.getSystemService（Context.AUDIO_SERVICE）;长EVENTTIME = SystemClock.uptimeMillis（） -  1;
KeyEvent的downEvent =新的KeyEvent（EVENTTIME，EVENTTIME，KeyEvent.ACTION_DOWN，KeyEvent.KEY code_MEDIA_PLAY_PAUSE，0）;
am.dispatchMediaKeyEvent（downEvent）;EVENTTIME ++;
KeyEvent的upEvent =新的KeyEvent（EVENTTIME，EVENTTIME，KeyEvent.ACTION_UP，KeyEvent.KEY code_MEDIA_PLAY_PAUSE，0）;
am.dispatchMediaKeyEvent（upEvent）;
 

Can anyone tell me why this is not working on Kitkat anymore and how to solve it?

    private Intent player;
    player = new Intent(Intent.ACTION_MEDIA_BUTTON);
    synchronized (this) {
        player.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PLAY));
        sendOrderedBroadcast(player, null);

        player.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PLAY));
        sendOrderedBroadcast(player, null);
    }

解决方案

There is new method AudioManager.dispatchMediaKeyEvent(KeyEvent) in API level 19 that was created specifically for this purpose.

http://developer.android.com/reference/android/media/AudioManager.html#dispatchMediaKeyEvent(android.view.KeyEvent)

This code works on KitKat:

AudioManager am = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);

long eventtime = SystemClock.uptimeMillis() - 1;
KeyEvent downEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE, 0);
am.dispatchMediaKeyEvent(downEvent);

eventtime++;
KeyEvent upEvent = new KeyEvent(eventtime,eventtime,KeyEvent.ACTION_UP,KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE, 0);         
am.dispatchMediaKeyEvent(upEvent);

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