<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@color/white"
    android:gravity="center_vertical"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/patient_top"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_alignParentTop="true"
        android:background="@color/green"
        android:gravity="center_vertical|center_horizontal"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/txtPatient"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="选择城市"
            android:textColor="@color/white"
            android:textSize="20sp" />

    </LinearLayout>

</LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical|center_horizontal"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.hzhi.dialogtest.MainActivity" >

    <Button
        android:id="@+id/btn01"
        android:layout_width="150dp"
        android:layout_height="wrap_content"
        android:text="选择城市1" />

    <Button
        android:id="@+id/btn02"
        android:layout_width="150dp"
        android:layout_height="wrap_content"
        android:text="选择城市2" />

</LinearLayout>

package com.hzhi.dialogtest;

import android.support.v7.app.ActionBarActivity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends ActionBarActivity implements OnClickListener{

    final String[] cities = new String[6];
    Button button_01, button_02;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }

    private void initView(){
           cities[0] = "北京";
           cities[1] = "上海";
           cities[2] = "深圳";
           cities[3] = "广州";
           cities[4] = "杭州";
           cities[5] = "成都";           

        button_01 = (Button) findViewById(R.id.btn01);
        button_01.setOnClickListener(this);
        button_02 = (Button) findViewById(R.id.btn02);
        button_02.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        switch (v.getId()){
        case R.id.btn01:
            AlertDialog.Builder builder1 = new AlertDialog.Builder(MainActivity.this);
            builder1.setItems(cities, new DialogInterface.OnClickListener()
            {
                @Override
                public void onClick(DialogInterface dialog, int which)
                {

                }
            });
            builder1.setTitle("选择城市");
            builder1.show();
            break;
        case R.id.btn02:
            LayoutInflater layoutInflater = LayoutInflater.from(MainActivity.this);
            View mTitleView = layoutInflater.inflate(R.layout.title, null);
            AlertDialog.Builder builder2 = new AlertDialog.Builder(MainActivity.this);
            builder2.setItems(cities, new DialogInterface.OnClickListener()
            {
                @Override
                public void onClick(DialogInterface dialog, int which)
                {

                }
            });
            builder2.setCustomTitle(mTitleView);
            builder2.show();
            break;
        }

    }

}