android监听Home键

将到android中Home键的监听，很多人第一反应时重写相应Activity的onKeyDown()方法，监听当按下的键的keyCode为KEYCODE_HOME时，进行自己的相应的处理。如：

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
	if (keyCode == KeyEvent.KEYCODE_HOME) {
		stopService(mIntentService);
		return true;
	}
	return super.onKeyDown(keyCode, event);
}

但是这样的监听是不能监听到HOME键的。这样的方法只能监听到BACK,MENU键。那么怎么监听Home键了？

1.新建一个监听Home键的Listener

public class HomeListener {
	static final String TAG = "HomeListener"; 
    private Context mContext; 
    private IntentFilter mFilter; 
    private OnHomePressedListener mListener; 
    private InnerRecevier mRecevier; 
 
    // 回调接口  
    public interface OnHomePressedListener { 
        public void onHomePressed(); 
 
        public void onHomeLongPressed(); 
    } 
 
    public HomeListener(Context context) { 
        mContext = context; 
        mFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS); 
    } 
 
    /**
     * 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 startWatch() { 
        if (mRecevier != null) { 
            mContext.registerReceiver(mRecevier, mFilter); 
        } 
    } 
 
    /**
     * 停止监听，注销广播
     */ 
    public void stopWatch() { 
        if (mRecevier != null) { 
            mContext.unregisterReceiver(mRecevier); 
        } 
    }
    
    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(); 
                        } 
                    } 
                } 
            } 
        } 
    } 
}

2.在使用的类的onCreate方法中注册Home键的监听

/**
	 * 注册Home键的监听
	 */
	private void registerHomeListener() {
		mHomeWatcher = new HomeListener(this); 
		mHomeWatcher.setOnHomePressedListener(new OnHomePressedListener() {
			
			@Override
			public void onHomePressed() {
				//TODO 进行点击Home键的处理
				Log.i("xsl", "0000000000000");
				stopService(mIntentService);
			}
			
			@Override
			public void onHomeLongPressed() {
				//TODO 进行长按Home键的处理
				Log.i("xsl", "0000000000000");
			}
		});
		mHomeWatcher.startWatch();
	}

3. 在使用的类的onPause方法中停止监听

mHomeWatcher.stopWatch();