对我来说有用的是创建DialogFragment并将其设置为不可取消:

dialog.setCancelable(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);

对我来说有用的是创建DialogFragment并将其设置为不可取消:

dialog.setCancelable(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

也可以分配不同的动作实现onCancelListener:

alertDialog.setOnCancelListener(new DialogInterface.OnCancelListener(){                   
    @Override
    public void onCancel(DialogInterface dialogInterface) {
        //Your custom logic
    } 
});

当在onCreate中使用dialog作为一个活动时，添加这个

setFinishOnTouchOutside(false);