Question

我有片段A，其中包含两个按钮（让我们说ButtonA和ButtonB），按下ButtonB我正在加载片段B（片段B包含1个按钮，让我们说按钮C），同时按下按钮C，弹出窗口将会出现。

我现在面临的问题，当我回来按下然后popwindow正在消失但加载片段A。

实际上我需要在片段B中显示popwindow时，然后用户按下后退按钮，弹出窗口应该只消失并且它仍然保留在片段B中，而不是去片段A。

我做了什么，从片段B我创建了一个接口并在一个Activity中传递Popwindow实例，并从活动中解除了popwindow。

 @Override
    public void onHandleRequest(PopupWindow popupWindow, PopupWindow backpopwindow, String fragmentName) {
        if(fragmentName !=null){
            this.fragmentName=fragmentName;
          if(popupWindow!=null){
              this.popupWindow=popupWindow;
              this.backpopwindow=backpopwindow;

          }
        }



@Override
    public void onBackPressed() {
        super.onBackPressed();

        if(popupWindow!=null && popupWindow.isShowing()){
            popupWindow.dismiss();
            backpopwindow.dismiss();
        }
}

在我的片段类中：

public interface OnHandleCallBack{
        public void onHandleRequest(PopupWindow popupWindow,PopupWindow backpopwindow,String fragmentName);
    }

public void showPopup(View view, Context context,ArrayList<String> arrayList) {

        if(popupWindow!=null && popupWindow.isShowing()){
            popupWindow.dismiss();
        }

        mLayoutManager.setScrollEnabled(false);
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        //Making transparent layout

        final View popupView1  = inflater.inflate(R.layout.transparent_layout,
                (ViewGroup) view.findViewById(R.id.transprent));

        popupWindow1 = new PopupWindow(popupView1, WindowManager.LayoutParams.MATCH_PARENT,WindowManager.LayoutParams.MATCH_PARENT);
        popupWindow1.showAtLocation(popupView1, Gravity.CENTER, 0 , 0);
        popupWindow1.setBackgroundDrawable(new BitmapDrawable());
        popupWindow1.setOutsideTouchable(true);
        popupWindow1.showAsDropDown(popupView1, 0, 0);

        final View popupView  = inflater.inflate(R.layout.my_order_truck_popup_win,
                (ViewGroup) view.findViewById(R.id.popup_win));

        RecyclerView mRecyclerView = (RecyclerView) popupView.findViewById(R.id.truck_recyler_id);
        TextView textView=(TextView) popupView.findViewById(R.id.txt_truck);
        RelativeLayout cancl_rl=(RelativeLayout)popupView.findViewById(R.id.rl_cncl);
        textView.setText(context.getResources().getString(R.string.trucks));
        Config.colorFont(context,null,textView,null);
        popupView.setAnimation(AnimationUtils.loadAnimation(context, R.anim.pop_up_window));

        /********* Here is my PopUp window ********/
        Float m=TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 300, getResources().getDisplayMetrics());
        int m1=Math.round(m);
        popupWindow = new PopupWindow(popupView,m1,WindowManager.LayoutParams.WRAP_CONTENT);

        popupWindow.showAtLocation(popupView, Gravity.CENTER, 0 , 0);
        popupWindow.setBackgroundDrawable(new BitmapDrawable());
        popupWindow.setOutsideTouchable(true);

        MyOrderPopUPAdapter mAdapter = new MyOrderPopUPAdapter(context, arrayList);
        LinearLayoutManager LayoutManager = new LinearLayoutManager(context);
        mRecyclerView.setLayoutManager(LayoutManager);
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());
        mRecyclerView.setAdapter(mAdapter);
        onHandleCallBack.onHandleRequest(popupWindow,popupWindow1,"orderfragment");

        popupWindow1.setTouchInterceptor(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                popupWindow.dismiss();
                popupWindow1.dismiss();
                mLayoutManager.setScrollEnabled(true);
                return true;
            }
        });



        cancl_rl.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                popupWindow.dismiss();
                popupWindow1.dismiss();
                mLayoutManager.setScrollEnabled(true);

            }
        });

        popupWindow.showAsDropDown(popupView, 0, 0);
    }

@Override
    public void onAttach(Context context) {
        super.onAttach(context);
        try {
            onHandleCallBack = (OnHandleCallBack)context;

        } catch (ClassCastException e) {
            throw new ClassCastException(context.toString()
                    + " must implement onHandleCallBack");
        }
    }

Answer 1

与AlertDialogs不同，PopupWindows在后退时不会被隐式解雇。我们必须为它明确地编写逻辑。

更改你的onBackPressed（）如下：

@Override
    public void onBackPressed() {
        if(popupWindow!=null && popupWindow.isShowing()){
            popupWindow.dismiss();
            backpopwindow.dismiss();
        } else {
            super.onBackPressed();
        }
}

在这里，我们首先检查PopupWindow是否可见。如果它是可见的，只需关闭PopupWindow，然后通过调用super.onBackPressed()来允许正常的onBackPressed流。

不知道使用PopupWindow的确切原因。请查看此更多选项并确定适合您需求的选项：

Android Popup Window vs Android Dialog

Dialogs and Popups in Android

Fragment Back Press，装回碎片

1 个答案: