To create A dialog with rounded corners follow given steps
1. First create a custom view with ID custom.xml and design the layout of the dialog in this custom view.
2. In onCreate Add a addSourceDirectly block and enter the following code. 
Also see
1)Create Stylish Pop Up Menu In Sketchware
2) Create sketchware Navigation Drawer
Thank you for reading , please keep up in your visiting every day .
Have a nice experience .
1. First create a custom view with ID custom.xml and design the layout of the dialog in this custom view.
2. In onCreate Add a addSourceDirectly block and enter the following code. 
final AlertDialog dialog = new AlertDialog.Builder(MainpageActivity.this).create();//MainPageActivity.this is your activity //change to your activity name LayoutInflater inflater = getLayoutInflater(); View convertView = (View) inflater.inflate(R.layout.custom, null);//Custom is your custom view //change custom to your view name dialog.setView(convertView); TextView textview4 = (TextView) convertView.findViewById(R.id.textview4); textview4.setText("your text here!");Button button1 = (Button) convertView.findViewById(R.id.button1);button1.setOnClickListener(new View.OnClickListener(){ public void onClick(View v){ dialog.dismiss(); } });
dialog.show(); Also see
2) Create sketchware Navigation Drawer
Thank you for reading , please keep up in your visiting every day .
Have a nice experience .
