关闭Android弹出窗口并按回键

Posted 2023-01-19

我创建了一个android应用程序，并在其中创建了一个弹出屏幕。但是当我按下“后退”按钮时，弹出窗口并没有关闭。

我已经尝试过使用onBackPressed（）。它不起作用。

有人可以告诉我该怎么做。

问候，

Shankar

答案

您需要做的是在初始化PopupWindow之后在其上调用setBackgroundDrawable。类似于：

myPopup.setBackgroundDrawable(new BitmapDrawable());

另一答案

最近我使用ListPopupWindow（android.support.v7.internal.widget.ListPopupWindow），并且在我打电话时后退按钮开始起作用

popupWindow.setModal(true);

无论我在setBackgroundDrawable方法中设置的是什么，如此处所假定的其他解决方案。

另一答案

LayoutInflater layoutInflater = (LayoutInflater)MainActivity.this.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    View popupView = layoutInflater.inflate(R.layout.popup_window_country_list, null);
    countryPopup = new PopupWindow(popupView, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

    countryPopup.setBackgroundDrawable (new BitmapDrawable());

    countryPopup.setFocusable(true); //Make Here True For back press dismiss

    countryPopup.setOutsideTouchable(true); 

    countryPopup.setTouchInterceptor(new OnTouchListener() 

        public boolean onTouch(View v, MotionEvent event) 
            if (event.getAction() == MotionEvent.ACTION_OUTSIDE) 

                countryPopup.dismiss();


                return true;

            

            return false;

        
    );

另一答案

100％弹出窗口在按下后将消失。用下面的代码替换您的Popup代码

public void popup() 

    View popUpView_pur = getActivity().getLayoutInflater().inflate(R.layout.popup, null);
    PopupWindow popuplayout_pur = new PopupWindow(popUpView_pur, -1, -1, true);
    popuplayout_pur.setBackgroundDrawable(new BitmapDrawable());
    popuplayout_pur.setOutsideTouchable(true);
    popuplayout_pur.showAtLocation(popUpView_pur, 17, 0, 0);

（或）

public void popup() 
    // TODO Auto-generated method stub
    LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View popupView = inflater.inflate(R.layout.popuplayout, null, false);

    PopupWindow pw = new PopupWindow(getActivity());
    pw.setWidth(WindowManager.LayoutParams.MATCH_PARENT);
    pw.setHeight(WindowManager.LayoutParams.MATCH_PARENT);

    pw.setTouchable(true);
    pw.setFocusable(true);
    pw.setOutsideTouchable(true);
    pw.setContentView(popupView);

    pw.showAtLocation(popupView, Gravity.CENTER, 0, 0);

另一答案

//here "popUp" is ref of PopupWindow

popUp.setBackgroundDrawable(new BitmapDrawable());// it is most important peace of code

// For Key Listeners

View v = popUp.getContentView();

//Here assigning the key Listners

    v.setOnKeyListener(this);

    @Override   
    public boolean onKey(View v, int keyCode, KeyEvent event) 

        if(keyCode == KeyEvent.KEYCODE_BACK) popUp.dismiss();

        return false;

    //Implements the KeyListener
     //and be careful we should implement "OnKeyListener"`

我希望它有用（我是新用户）

另一答案

以下代码运行正常。因此，请在您的活动中覆盖以下功能

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) 
     //Changes 'back' button action
    if(keyCode==KeyEvent.KEYCODE_BACK)
    
        if(!popUpHelper.isPopupShowing())
            onBackPressed();
        else
            popUpHelper.dismiss();
        
    

    return super.onKeyDown(keyCode, event);



class PopupHelper 
 PopupWindow popupWindowAttachment;
  public void initAndShow(Activity context,int mToolbarHeight)

   View layout = activity.getLayoutInflater().inflate(
            R.layout.activity_chat_attachment_popup, null);
    //create and show and Make sure popup window focusable should be false
    popupWindowAttachment = new PopupWindow(layout,
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.WRAP_CONTENT);
    popupWindowAttachment.showAsDropDown(layout, 0, mToolbarHeight
            + (mToolbarHeight / 2) - 5);

  

  public void dismiss() 
    if (isPopupShowing())
            popupWindowAttachment.dismiss();
  
  public boolean isPopupShowing() 
    return popupWindowAttachment==null?false:popupWindowAttachment  
                 .isShowing();
  

另一答案

当您按下返回按钮时，弹出窗口通常会关闭。如果您需要在弹出窗口关闭时处理某些事情，则可以使用popupWindow.setOnDismissListener

注：-我在科特林工作。它对我有用

另一答案

popup.setBackgroundDrawable(new BitmapDrawable());

popup.setOnDismissListener(new PopupWindow.OnDismissListener() 
            @Override
            public void onDismiss() 
                //do your code here
            
        );