尽管活动在后台进行并且新活动回来，但始终将Android弹出式窗口保持在最前端

问题描述：

这是一个弹出式窗口，正在活动A中显示。用户在活动A上按下按钮，然后活动B在顶部。但问题是，弹出还要落后活性B.尽管活动在后台进行并且新活动回来，但始终将Android弹出式窗口保持在最前端

我想弹出来始终在最前面，即使活动回地面进入

LayoutInflater layoutInflater = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE); 

LeadOffPopView = layoutInflater.inflate(
     R.layout.leadoffdetect, null); 
LeadOffPopWindow = new PopupWindow(
     LeadOffPopView, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); 
final TextView bLATxtVw = (TextView) (LeadOffPopView) 
     .findViewById(R.id.LATxtVw); 
final TextView bRATextView = (TextView) (LeadOffPopView) 
     .findViewById(R.id.RATxtVw); 
final TextView bLLTextView = (TextView) (LeadOffPopView) 
     .findViewById(R.id.LLTxtVw); 
final TextView bRLTextView = (TextView) (LeadOffPopView) 
     .findViewById(R.id.RLTxtVw); 
final TextView bV1TextView = (TextView) (LeadOffPopView) 
     .findViewById(R.id.V1TxtVw); 
final TextView bV2TextView = (TextView) (LeadOffPopView) 
     .findViewById(R.id.V2TxtVw); 
final TextView bV3TextView = (TextView) (LeadOffPopView) 
     .findViewById(R.id.V3TxtVw); 
final TextView bV4TextView = (TextView) (LeadOffPopView) 
     .findViewById(R.id.V4TxtVw); 
final TextView bV5TextView = (TextView) (LeadOffPopView) 
     .findViewById(R.id.V5TxtVw); 
final TextView bV6TextView = (TextView) (LeadOffPopView) 
     .findViewById(R.id.V6TxtVw); 


final Handler handler = new Handler(); 
handler.postDelayed(new Runnable() { 
    @Override 
    public void run() { 
     if (bLAOff) { 
      bLATxtVw.setVisibility(View.VISIBLE); 
     } else 
      bRATextView 
      .setVisibility(View.INVISIBLE); 

     if (bRAOff) { 
      bRATextView 
      .setVisibility(View.VISIBLE); 
     } else 
      bRATextView 
      .setVisibility(View.INVISIBLE); 
     if (bLLOff) { 
      bLLTextView 
      .setVisibility(View.VISIBLE); 
     } else 
      bLLTextView 
      .setVisibility(View.INVISIBLE); 

     if (bRLOff) { 
      bRLTextView 
      .setVisibility(View.VISIBLE); 
     } else 
      bRLTextView 
      .setVisibility(View.INVISIBLE); 

     if (bV1Off) { 
      if(!MainClass.bLANDSCAPEENABLED) 
      bV1TextView 
      .setVisibility(View.VISIBLE); 
     } else 
      bV1TextView 
      .setVisibility(View.INVISIBLE); 

     if (bV2Off) { 
      if(!MainClass.bLANDSCAPEENABLED) 
      bV2TextView 
      .setVisibility(View.VISIBLE); 
     } else 
      bV2TextView 
      .setVisibility(View.INVISIBLE); 

     if (bV3Off) { 
      if(!MainClass.bLANDSCAPEENABLED) 
      bV3TextView 
      .setVisibility(View.VISIBLE); 
     } else 
      bV3TextView 
      .setVisibility(View.INVISIBLE); 

     if (bV4Off) { 
      if(!MainClass.bLANDSCAPEENABLED) 
      bV4TextView 
      .setVisibility(View.VISIBLE); 
     } else 
      bV4TextView 
      .setVisibility(View.INVISIBLE); 

     if (bV5Off) { 
      if(!MainClass.bLANDSCAPEENABLED) 
      bV5TextView 
      .setVisibility(View.VISIBLE); 
     } else 
      bV5TextView 
      .setVisibility(View.INVISIBLE); 

     if (bV6Off) { 
      if(!MainClass.bLANDSCAPEENABLED) 
      bV6TextView 
      .setVisibility(View.VISIBLE); 
     } else 
      bV6TextView 
      .setVisibility(View.INVISIBLE); 

     handler.postDelayed(this, 500); 
    } 
}, 250); 

LeadOffPopWindow.showAtLocation(
     LeadOffPopView, 
     Gravity.CENTER_HORIZONTAL | Gravity.TOP,20 , 
     300);

答

PopUpWindow /对话框连接你的活动窗口管理范围内，所以当你的活动将在后台进行，PopUpWindow/Dialog也将隐藏。

因此请使用系统警报PopupWindow /对话框为达到这个目的，你可以使用下面的代码创建系统对话框：

AlertDialog newDialog = new AlertDialog.Builder(context) 
        .setMessage(text) 
        .setPositiveButton(R.string.ok, null) 
        .setCancelable(true) 
        .create(); 
newDialog.getWindow().setType(
        WindowManager.LayoutParams.TYPE_SYSTEM_DIALOG); 
newDialog.getWindow().addFlags(
        WindowManager.LayoutParams.FLAG_DIM_BEHIND); 
newDialog.show();

尽管活动在后台进行并且新活动回来，但始终将Android弹出式窗口保持在最前端

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