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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。
- 按键速度管制管制
- 增加了按键声音
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);
}
}
}
正文完