Create AlertDialog from ArrayAdapter

<?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="wrap_content"
    android:paddingLeft="10dp"
    android:paddingRight="10dp"
    android:minHeight="?android:attr/listPreferredItemHeight">
    <TextView 
        android:id="@+id/text_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:textAppearance="?android:attr/textAppearanceMedium"/>
    <TextView 
        android:id="@+id/text_detail"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:textAppearance="?android:attr/textAppearanceSmall"/>
</RelativeLayout>

package com.java2s.myapplication3.app;
//from  w w w.  jav  a2 s.c  om
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity
        implements DialogInterface.OnClickListener, View.OnClickListener {

    private static final String[] ZONES =
            {"Pacific Time", "Mountain Time", "Central Time", "Eastern Time", "Atlantic Time"};
    private static final String[] OFFSETS =
            {"GMT-08:00", "GMT-07:00", "GMT-06:00", "GMT-05:00", "GMT-04:00"};

    Button mButton;
    AlertDialog mActions;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setTitle("Activity");
        mButton = new Button(this);
        mButton.setText("Click for Time Zones");
        mButton.setOnClickListener(this);

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.activity_main) {
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                View row = convertView;
                if (row == null) {
                    row = getLayoutInflater().inflate(R.layout.activity_main, parent, false);
                }

                TextView name = (TextView) row.findViewById(R.id.text_name);
                TextView detail = (TextView) row.findViewById(R.id.text_detail);

                name.setText(ZONES[position]);
                detail.setText(OFFSETS[position]);

                return row;
            }

            @Override
            public int getCount() {
                return ZONES.length;
            }
        };

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Select Time Zone");
        builder.setAdapter(adapter, this);
        builder.setNegativeButton("Cancel", null);
        mActions = builder.create();

        setContentView(mButton);
    }
    @Override
    public void onClick(DialogInterface dialog, int which) {
        String selected = ZONES[which];
        mButton.setText(selected);
    }
    @Override
    public void onClick(View v) {
        mActions.show();
    }
}