为了防止对话框在返回键按下时被取消，使用这个

dialog.setCancelable(false);

为了防止对话框在外部触摸时消失，使用这个

 dialog.setCanceledOnTouchOutside(false);

为了防止对话框在返回键按下时被取消，使用这个

dialog.setCancelable(false);

为了防止对话框在外部触摸时消失，使用这个

 dialog.setCanceledOnTouchOutside(false);

Dialog dialog = new Dialog(context)
dialog.setCanceledOnTouchOutside(true); 
//use this to dismiss the dialog on outside click of dialog

dialog.setCanceledOnTouchOutside(false);
//use this for not to dismiss the dialog on outside click of dialog.

观看这个链接了解更多关于对话的细节。

dialog.setCancelable(false);
//used to prevent the dismiss of dialog on backpress of that activity

dialog.setCancelable(true);
//used to dismiss the dialog on onbackpressed of that activity

对我来说有用的是创建DialogFragment并将其设置为不可取消:

dialog.setCancelable(false);

使用这个代码，它为我工作

 AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);
 alertDialog.setCancelable(false);

以下是我的解决方案:

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select The Difficulty Level");
builder.setCancelable(false);