Android监听Home、电源键

Android监听Home、电源键

一、Home键监听

先禁止Home键，再在onKeyDown里处理按键值，点击Home键的时候就把程序关闭(此方法在4.0及以上版本中不可用)

<uses-permission android:name="android.permission.DISABLE_KEYGUARD">uses-permission

@Override

public boolean onKeyDown(int keyCode, KeyEvent event)

{ // TODO Auto-generated method stub

if(KeyEvent.KEYCODE_HOME==keyCode)

android.os.Process.killProcess(android.os.Process.myPid());

return super.onKeyDown(keyCode, event);

}

@Override

public void onAttachedToWindow()

{ // TODO Auto-generated method stub

this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);

super.onAttachedToWindow();

}

二、电源键监听

首先，我们是要获取系统权限

通过监听系统的两个action:

Intent.ACTION_SCREEN_OFF

Intent.ACTION_SCREEN_ON

private final BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver() {

@Override

public void onReceive(final Context context, final Intent intent) {

final String action = intent.getAction();

if (Intent.ACTION_SCREEN_OFF.equals(action)) {

//退出程序...

}

};

onCreate()方法中注册

IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);

registerReceiver(mBatInfoReceiver, filter);

onDestory()方法中解除注册

if(mBatInfoReceiver != null){

try {

unregisterReceiver(mBatInfoReceiver);

} catch (Exception e) {

Log.e(TAG, "unregisterReceiver mBatInfoReceiver failure :"+e.getCause());

}

以上简单介绍使用方法，下面实现自定义Home\电源键监听(支持4.0及以上或以下)

/**
* Home键监听
* @author miaowei
*
*/
public class HomeKeyListener {

static final String TAG = "HomeKeyListener";
private Context mContext;
private IntentFilter mFilter;
private OnHomePressedListener mListener;
private InnerRecevier mRecevier;
/**
   * Home键监听构造初始化
   * @param context
   */
public HomeKeyListener(Context context) {
    mContext = context;
    mFilter = new IntentFilter();
    mFilter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
    mFilter.addAction(Intent.ACTION_SCREEN_OFF);
    mFilter.addAction(Intent.ACTION_SCREEN_ON);

}

/**
* 回调接口
* @author miaowei
*
*/
public interface OnHomePressedListener {

   /**
    * Home键短按
    */
   public void onHomePressed();
   /**
    * Home键长按
    */
   public void onHomeLongPressed();
   /**
    * 监听电源键/开
    */
   public void onScreenPressed();
   /**
    * 监听电源键/关
    */
   public void offScreenPressed();
}

/**
   * 设置监听
   * @param listener
   */
public void setOnHomePressedListener(OnHomePressedListener listener) {
  mListener = listener;
  mRecevier = new InnerRecevier();
}

/**
* 开始监听,注册广播
*/
public void startHomeListener() {
  if (mRecevier != null) {
   mContext.registerReceiver(mRecevier, mFilter);
  }
}

/**
* 停止监听，注销广播
*/
public void stopHomeListener() {
  if (mRecevier != null) {
   mContext.unregisterReceiver(mRecevier);
  }
}
/**
   * 广播接收
   * @author miaowei
   *
   */
class InnerRecevier extends BroadcastReceiver{

   final String SYSTEM_DIALOG_REASON_KEY = "reason";
   final String SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS = "globalactions";
   final String SYSTEM_DIALOG_REASON_RECENT_APPS = "recentapps";
   final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey";

  @Override
  public void onReceive(Context context, Intent intent) {
   String action = intent.getAction();
   if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {

    String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);
    if (reason != null) {
     Log.e(TAG, "action:" + action + ",reason:" + reason);
     if (mListener != null) {
      if (reason.equals(SYSTEM_DIALOG_REASON_HOME_KEY)) {
       // 短按home键
       mListener.onHomePressed();
      } else if (reason.equals(SYSTEM_DIALOG_REASON_RECENT_APPS)) {
       // 长按home键
       mListener.onHomeLongPressed();
      }
     }
    }
   }//监听电源键开
   if (action.equals(Intent.ACTION_SCREEN_OFF)) {

    mListener.offScreenPressed();

   }else if (action.equals(Intent.ACTION_SCREEN_ON)) {

    mListener.onScreenPressed();
   }
  }
}
}

在Activity中的使用

public class MainActivity extends Activity {
    private static final String TAG = "MainActivity";
    private HomeKeyListener homeKeyListener;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

       homeKeyListener = new HomeKeyListener(this);
       homeKeyStart(); //处理方法

       homeKeyListener.startHomeListener(); //开启监听
    }

/**
* Home键开始监听
*/
private void homeKeyStart(){

  homeKeyListener.setOnHomePressedListener(new OnHomePressedListener() {

   @Override
   public void onHomePressed() {

    // 这里获取到home键按下事件
    Log.i("lock", "onHomePressed ========================================");

   }

   @Override
   public void onHomeLongPressed() {

    Log.i("lock", "onHomeLongPressed ========================================");

   }

   @Override
   public void onScreenPressed() {
    // TODO Auto-generated method stub

   }

   @Override
   public void offScreenPressed() {
    // TODO Auto-generated method stub
      }
  });
}
    @Override
    protected void onDestroy() {
        super.onPause();
       if(homeKeyListener != null){

homeKeyListener.stopHomeListener(); //关闭监听

}

}
}

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