Free Online Tutorials

Example 1:

You can see in this tutorial:
Android Lesson 12 part 2: ListFragment

        AlertDialog.Builder adb= new AlertDialog.Builder(getActivity());
        adb.setTitle("Delete?");
        adb.setMessage("Are you sure you want to delete " + cities.get(position));
        adb.setNegativeButton("Cancel", null);
        adb.setPositiveButton("Ok", new AlertDialog.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                cities.remove(position);
                adapter.notifyDataSetChanged();
            }});
        adb.show();

Example 2: create android dialog with a custom layout

File res/layout/dialog_content.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">

    <Button
        android:id="@+id/sim1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:text="Sim 1" />
    <Button
        android:id="@+id/sim2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_below="@id/sim1"
        android:text="Sim 2" />

</RelativeLayout>

Java:

        AlertDialog.Builder adb= new AlertDialog.Builder(getActivity());
         
        adb.setTitle("Choose SIM");

        View view1 = getActivity().getLayoutInflater().inflate(R.layout.dialog_content, null);
        view1.findViewById(R.id.sim1).setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                Toast.makeText(getActivity(),"Sim 1", Toast.LENGTH_SHORT).show();
            }
        });
        view1.findViewById(R.id.sim2).setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                Toast.makeText(getActivity(),"Sim 2", Toast.LENGTH_SHORT).show();
            }
        });
        adb.setView(view1);

        adb.setNeutralButton("Close", new AlertDialog.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }});
        adb.show();