android - 防止 Activity 退出

Question

我想知道如果用户按下后退和主页按钮，如何防止 Activity 退出？

Answer 1

你可以使用:

@Override
    public boolean onKeyDown(int keyCode, KeyEvent event)  {
        if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
            // don't write anything here to make back button not work
            return true;
        }

        return super.onKeyDown(keyCode, event);
    }

或者您可以使用 onBackPressed() 但旧版本不支持此功能。

@Override
public void onBackPressed() {
// don't write anything here to make back button  not work
}