package com.lxt008;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.content.DialogInterface;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageButton;import android.widget.TextView;public class Activity01 extends Activity{    TextView    m_TextView;    //声明4个ImageButton对象    ImageButton    m_ImageButton1;    ImageButton    m_ImageButton2;    ImageButton    m_ImageButton3;    ImageButton    m_ImageButton4;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                m_TextView = (TextView) findViewById(R.id.TextView01);        //分别取得4个ImageButton对象        m_ImageButton1 = (ImageButton) findViewById(R.id.ImageButton01);        m_ImageButton2 = (ImageButton) findViewById(R.id.ImageButton02);        m_ImageButton3 = (ImageButton) findViewById(R.id.ImageButton03);        m_ImageButton4 = (ImageButton) findViewById(R.id.ImageButton04);                //分别设置所使用的图标        //m_ImageButton1是在xml布局中设置的，这里就暂时不设置了        m_ImageButton2.setImageDrawable(getResources().getDrawable(R.drawable.button2));        m_ImageButton3.setImageDrawable(getResources().getDrawable(R.drawable.button3));        m_ImageButton4.setImageDrawable(getResources().getDrawable(android.R.drawable.sym_call_incoming));                //以下分别为每个按钮设置事件监听setOnClickListener        m_ImageButton1.setOnClickListener(new Button.OnClickListener()        {          public void onClick(View v)          {              //对话框              Dialog dialog = new AlertDialog.Builder(Activity01.this)                .setTitle("提示")                .setMessage("我是ImageButton1")                .setPositiveButton("确定",                new DialogInterface.OnClickListener()                 {                    public void onClick(DialogInterface dialog, int whichButton)                    {                                            }                }).create();//创建按钮                            dialog.show();          }        });        m_ImageButton2.setOnClickListener(new Button.OnClickListener()        {          public void onClick(View v)          {              Dialog dialog = new AlertDialog.Builder(Activity01.this)                .setTitle("提示")                .setMessage("我是ImageButton2，我要使用ImageButton3的图标")                .setPositiveButton("确定",                new DialogInterface.OnClickListener()                 {                    public void onClick(DialogInterface dialog, int whichButton)                    {                        m_ImageButton2.setImageDrawable(getResources().getDrawable(R.drawable.button3));                    }                }).create();//创建按钮                            dialog.show();          }        });        m_ImageButton3.setOnClickListener(new Button.OnClickListener()        {          public void onClick(View v)          {              Dialog dialog = new AlertDialog.Builder(Activity01.this)                .setTitle("提示")                .setMessage("我是ImageButton3，我要使用系统打电话图标")                .setPositiveButton("确定",                new DialogInterface.OnClickListener()                 {                    public void onClick(DialogInterface dialog, int whichButton)                    {                        m_ImageButton3.setImageDrawable(getResources().getDrawable(android.R.drawable.sym_action_call));                    }                }).create();//创建按钮                            dialog.show();          }        });        m_ImageButton4.setOnClickListener(new Button.OnClickListener()        {          public void onClick(View v)          {              Dialog dialog = new AlertDialog.Builder(Activity01.this)                .setTitle("提示")                .setMessage("我是使用的系统图标！")                .setPositiveButton("确定",                new DialogInterface.OnClickListener()                 {                    public void onClick(DialogInterface dialog, int whichButton)                    {                                            }                }).create();//创建按钮                            dialog.show();          }        });    }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><TextView      android:id="@+id/TextView01"    android:layout_width="fill_parent"     android:layout_height="wrap_content"     />  <ImageButton  android:id="@+id/ImageButton01"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:src="@drawable/button1"  >  </ImageButton>    <ImageButton  android:id="@+id/ImageButton02"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  >  </ImageButton>  <ImageButton  android:id="@+id/ImageButton03"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  >  </ImageButton>    <ImageButton  android:id="@+id/ImageButton04"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  >  </ImageButton></LinearLayout>