Android WindowManager 監聽返回鍵及home鍵

一、監聽home鍵盤，Android Home鍵系統負責監聽，捕獲后系統自動處理。有時候，我們需要監聽home鍵處理自己的邏輯，監聽方法如下:

    /**
     * 監聽home鍵廣播
     */
    private final static BroadcastReceiver homeListenerReceiver = 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 (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
                String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);
                if (reason != null && reason.equals(SYSTEM_DIALOG_REASON_HOME_KEY)) {
                    // 處理自己的邏輯
                }
            }
        }
    };

在創建View時注冊Receiver
IntentFilter homeFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
context.registerReceiver(homeListenerReceiver, homeFilter);

在View消失時反注冊Receiver
// 反注冊home監聽
if (homeListenerReceiver != null) {
   context.unregisterReceiver(homeListenerReceiver);
}

二、WindowManager view中監聽返回及menu鍵

重寫dispatchKeyEvent
    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        switch (event.getKeyCode()) {
            case KeyEvent.KEYCODE_BACK:
            case KeyEvent.KEYCODE_MENU:
                // 處理自己的邏輯break;
            default:
                break;
        }
        return super.dispatchKeyEvent(event);
    }