显示弹出窗口时，onBackPressed的覆盖方法不起作用

Question

我想在android中显示弹出窗口时处理back press事件。我确实喜欢这个。在片段中：

@Override
public boolean onBackPressed() {
    if (backPressStrategy == BACK_PRESS_PLAN_A) {
        if (guideDialog != null) {
            guideDialog.dismiss();
        }
        closeFlashPay(REQ_CLOSE_FLASH_PAY_AND_FINISH);
        return true;
    } else if (backPressStrategy == BACK_PRESS_PLAN_B) {
        if (guideDialog != null) {
            guideDialog.dismiss();
        }
        getActivity().finish();
        return true;
    } else {
        return false;
    }
}

在活动中，我确实喜欢这样

@Override
public void onBackPressed() {
     PayBaseFragment contentFragment = (PayBaseFragment) getSupportFragmentManager().findFragmentByTag(TAG_CONTENT_FRAGMENT);
     if (contentFragment != null && contentFragment.onBackPressed()) {
         return;
     }
     super.onBackPressed();
}

问题是，当我第一次按下back按钮时，popupwindow就消失了，override onBackPressed方法没有被调用。除非我按两次后退按钮。我像这样显示我的弹出窗口

guideDialog.showAtLocation(getActivity().getWindow().getDecorView(), Gravity.CENTER, 0, 0);

谢谢你的帮助

Answer 1

您需要使用以下命令处理对话框的后退按钮键：

dialog.setOnKeyListener(new Dialog.OnKeyListener() {
                        @Override
                        public boolean onKey(DialogInterface arg0, int keyCode,
                                             KeyEvent event) {
                            if (keyCode == KeyEvent.KEYCODE_BACK) {
                                dialog.dismiss();
                                // you can call your onBackPress here

                            } 
                            return true;
                        }
                    });