<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"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=".MainActivity" ><Buttonandroid:id="@+id/button1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerHorizontal="true"android:layout_centerVertical="true"android:text="显示对话框" /><TextViewandroid:id="@+id/textView1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_below="@+id/button1"android:layout_centerHorizontal="true"android:layout_marginTop="45dp"android:text="TextView" /></RelativeLayout>

package com.bruce.alertdialog;import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;public class MainActivity extends Activity {private Button button;private TextView textView;private CharSequence[] items = {"北京","上海","贵州"};private boolean[] mulchoice = new boolean[items.length];@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);button = (Button) findViewById(R.id.button1);textView = (TextView)findViewById(R.id.textView1);button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {for(int i = 0;i<items.length;i++){mulchoice[i] = false;}AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);builder.setTitle("请选择");builder.setMultiChoiceItems(items, mulchoice, new DialogInterface.OnMultiChoiceClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which, boolean isChecked) {mulchoice[which] = isChecked;Log.i("MyTest", "-->which=" + which);}});builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {String s = "";for(int i=0;i<items.length;i++){if(mulchoice[i]){s = s + items[i] + ",";}}textView.setText(s.substring(0, s.length()-1));}});AlertDialog dialog = builder.create();dialog.show();}});}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);return true;}}