在AndroidTV我的项目中，应用了RecyclerView，然而有一个问题是，当长按按键的时候，焦点容易飞的掉，故在所有的Activity的父类BaseActivity中进行按键速度管制，间接贴上代码，如下。此办法能够重点用于解决RecyclerView按键长按焦点飞掉乱掉的问题。
public class BaseActivity extends FragmentActivity { public AudioManager mAudioMgr = null; public SoundPool sp;//申明一个SoundPool public int keypress;//定义一个整型用load（）；来设置suondID public int translation; public static final int EATKEYEVENT = 5;// 是否屏蔽按键的事件，管制按键的频率 private static final int keyEventTime = 10; //最短的按键事件应该是在100ms private static boolean eatKeyEvent = false; private Handler mHandler =new Handler(){ @Override public void handleMessage(Message msg) { switch (msg.what) { case EATKEYEVENT: eatKeyEvent = false;} } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mAudioMgr = (AudioManager) getSystemService(AUDIO_SERVICE); mAudioMgr.unloadSoundEffects(); sp = new SoundPool(10, AudioManager.STREAM_SYSTEM, 5);//第一个参数为同时播放数据流的最大个数，第二数据流类型，第三为声音品质 keypress = sp.load(this, R.raw.keypress_standard, 1); //把你的声音素材放到res/raw里，第2个参数即为资源文件，第3个为音乐的优先级 translation = sp.load(this, R.raw.translation, 1); } @Override public boolean dispatchKeyEvent(KeyEvent event) { if(event.getKeyCode() == KeyEvent.KEYCODE_BACK || event.getKeyCode() == KeyEvent.KEYCODE_DPAD_CENTER){ return super.dispatchKeyEvent(event); } if (eatKeyEvent) { return true; } else { if (event.getAction() == KeyEvent.ACTION_DOWN) { sp.play(keypress, 1, 1, 0, 0, 1); } if (event.getRepeatCount()>=2){ eatKeyEvent = true; mHandler.removeMessages(EATKEYEVENT); Message msg = mHandler.obtainMessage(EATKEYEVENT); mHandler.sendMessageDelayed(msg, keyEventTime); } } return super.dispatchKeyEvent(event); } public void playSound(){ if (sp != null){ sp.play(keypress, 1, 1, 0, 0, 1); } } public void playTranslation(){ if (sp != null){ sp.play(translation, 1, 1, 0, 0, 1); } }}