onResume时窗口无焦点

启动Activity，在onResume的时刻，窗口尚未获得焦点，测试 :

    protected void onResume() {        super.onResume();        // The activity has become visible (it is now "resumed").        Log.d(TAG, "onResume()");        Log.d(TAG, "hasWindowFocus=" + hasWindowFocus());        Log.d(TAG, "mEditText.hasWindowFocus=" + mEditText.hasWindowFocus());        Log.d(TAG, "mEditText.hasFocus=" + mEditText.hasFocus());    }

打印结果都是false，即：activity的窗口此刻未获得焦点。