android 偵聽home鍵

IntentFilter intentFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);

        registerReceiver(mHomeKeyMonitorReceiver, intentFilter);

private final BroadcastReceiver mHomeKeyMonitorReceiver = new BroadcastReceiver() {

        final String SYSTEM_DIALOG_REASON_KEY = "reason";
        final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey";


        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (Intent.ACTION_CLOSE_SYSTEM_DIALOGS.equals(action)) {
                String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);
                if (SYSTEM_DIALOG_REASON_HOME_KEY.equals(reason)) {
                    stopLaunch();
                    finish();
                }
            }
        }


    };