android 入门 imageButton

package com.zte.android.lession;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.ToggleButton;
/**
 * 
 * @author rychenga
 * imagebutton、button、togglebutton
 * imageButton 根据不同状态显示不同图片
 */
public class Activity_Button_003 extends Activity 
{
	private Button btn ;
	private ImageButton imageBtn ;
	private TextView txt ;
	private ToggleButton toggleBtn ;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) 
	{
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_button_layout_003);
		//实例化组件
		txt = (TextView)findViewById(R.id.lession003_textView1);
		btn = (Button)findViewById(R.id.lession003_button1);
		imageBtn = (ImageButton)findViewById(R.id.lession003_imageButton1);
		toggleBtn = (ToggleButton)findViewById(R.id.lession003_toggleButton1);
		
		//设置监听
		btn.setOnClickListener(btnOnClickListener);
		imageBtn.setOnLongClickListener(imageBtnOnLongClickListener);
		toggleBtn.setOnClickListener(toggleBtnOnClickListener);
	}
	
	private OnClickListener btnOnClickListener = new OnClickListener() {
		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			txt.setText("点击BUTTON按钮");
		}
	};
	
	private OnClickListener toggleBtnOnClickListener = new OnClickListener() {
		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			if (toggleBtn.isChecked()) {
				toggleBtn.setChecked(true);
			}else{
				toggleBtn.setChecked(false);
			}
		}
	};
	
	private OnLongClickListener imageBtnOnLongClickListener = new OnLongClickListener() {
		@Override
		public boolean onLongClick(View v) {
			// TODO Auto-generated method stub
			txt.setText("长按 ··· 按钮");
			return false;
		}
	};
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/lession003_textView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text=" This is button demo " />

    <Button
        android:id="@+id/lession003_button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="按钮" />

    <ToggleButton
        android:id="@+id/lession003_toggleButton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textOff="关003"
        android:textOn="开003" />

    <ImageButton
        android:id="@+id/lession003_imageButton1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/selector_003" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <!-- press -->
    <item android:state_pressed="true" android:drawable="@drawable/car_b"></item>
    <!-- get foucsed -->
    <item android:state_focused="true" android:drawable="@drawable/girl_c"></item>
    <!-- default -->
    <item android:drawable="@drawable/default_a"></item>
</selector>