AlertDialog

MainActivity.java

package com.hd.alertdialog;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;


public class MainActivity extends Activity {
    private Button mButton1,mButton2,mButton3;
    private AlertDialog.Builder dialog1,dialog2,dialog3;
    private String msg = "我是天才";
    private String[] hobby = {"跑","跳","玩"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mButton1 = (Button) findViewById(R.id.button1);
        mButton2 = (Button) findViewById(R.id.button2);
        mButton3 = (Button) findViewById(R.id.button3);
        mButton1.setOnClickListener(new mButton1Listener());
        mButton2.setOnClickListener(new Button2Listener());
        mButton3.setOnClickListener(new Button3Listener());

    }
    class mButton1Listener implements View.OnClickListener{

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            dialog1 = new AlertDialog.Builder(MainActivity.this);
            dialog1.setTitle("tiancai");
            dialog1.setMessage(msg);
            dialog1.setIcon(R.drawable.ic_launcher);
            dialog1.setNegativeButton("取消", new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    Toast.makeText(MainActivity.this, "取消", Toast.LENGTH_SHORT).show();
                }
            });
            dialog1.setPositiveButton("确定", new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    Toast.makeText(MainActivity.this, "确定", Toast.LENGTH_SHORT).show();
                }
            });
            dialog1.show();
        }

    }

    class Button2Listener implements View.OnClickListener{

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            dialog2 = new AlertDialog.Builder(MainActivity.this);
            dialog2.setItems(hobby, new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    Toast.makeText(MainActivity.this, hobby[which], Toast.LENGTH_SHORT).show();
                }
            });
            dialog1.setNegativeButton("取消", new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    Toast.makeText(MainActivity.this, "取消", Toast.LENGTH_SHORT).show();
                }
            });
            dialog1.setPositiveButton("确定", new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    Toast.makeText(MainActivity.this, "确定", Toast.LENGTH_SHORT).show();
                }
            });
            dialog2.show();
        }

    }
    class Button3Listener implements View.OnClickListener{

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            dialog3 = new AlertDialog.Builder(MainActivity.this);
            dialog3.setSingleChoiceItems(hobby, -1, new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    Toast.makeText(MainActivity.this, hobby[which], Toast.LENGTH_SHORT).show();
                }
            });
            dialog3.show();
        }

    }


}

layout_main.xml

<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="com.hd.alertdialog.MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="49dp"
        android:text="@string/alterdialog" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/button1"
        android:layout_below="@+id/button1"
        android:layout_marginTop="44dp"
        android:text="多选框" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button2"
        android:layout_below="@+id/button2"
        android:layout_marginTop="64dp"
        android:text="单选框" />

</RelativeLayout>