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();