How to implement an alert dialog in androidX

Question

I have migrated my project to androidX, and I want to implement an alert dialog with positive and negative feedback from the user.

I am using this code:

AlertDialog.Builder builder1 = new AlertDialog.Builder(getApplicationContext());

               builder1.setMessage("Write your message here.");
               builder1.setCancelable(true);

               builder1.setPositiveButton(
                       "Yes",
                       new DialogInterface.OnClickListener() {
                           public void onClick(DialogInterface dialog, int id) {

                               Log.d("MSG", "onClick: YES");
                           }
                       });

               builder1.setNegativeButton(
                       "No",
                       new DialogInterface.OnClickListener() {
                           public void onClick(DialogInterface dialog, int id) {
                               dialog.cancel();
                               Log.d("MSG", "onClick: No");

                           }
                       });

               AlertDialog alert11 = builder1.create();
               alert11.show();

But I get this error when running the app:

java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.

Answer 1

You can use the MaterialAlertDialogBuilder provided by the Material Components library.

Just use:

new MaterialAlertDialogBuilder(context)
            .setTitle("Dialog")
            .setMessage("Write your message here. ....")
            .setPositiveButton("Ok", /* listener = */ null)
            .setNegativeButton("Cancel", /* listener = */ null)
            .show();

The MaterialAlertDialogBuilder requires a Material theme and will result in an androidx.appcompat.app.AlertDialog.