4.8 ImageView的使用
package com.chaowen;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageView;public class Ex04_07_ImageView extends Activity { private ImageView mImageView01; private ImageView mImageView02; private Button mButton01; private Button mButton02; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mImageView01 = (ImageView)findViewById(R.id.myImageView1); mImageView02 = (ImageView)findViewById(R.id.myImageView2); mButton01 = (Button) findViewById(R.id.myButton1); mButton02 = (Button) findViewById(R.id.myButton2); //设置ImageView背景图 mImageView01.setImageDrawable(getResources(). getDrawable(R.drawable.right)); mImageView02.setImageDrawable(getResources(). getDrawable(R.drawable.oa)); //用OnClickListener来启动 mButton01.setOnClickListener(new Button.OnClickListener() { @Override public void onClick(View v) { //当启动后，ImageView立刻换背景图 mImageView01.setImageDrawable(getResources(). getDrawable(R.drawable.right)); } }); mButton02.setOnClickListener(new Button.OnClickListener() { @Override public void onClick(View v) { mImageView01.setImageDrawable(getResources(). getDrawable(R.drawable.left)); } }); }}?? main.xml
??<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout android:id="@+id/widget34" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android" > <!--建立第一個ImageView --> <ImageView android:id="@+id/myImageView1" android:layout_width="320px" android:layout_height="280px" android:layout_x="0px" android:layout_y="36px" /> <!--建立第二個ImageView --> <ImageView android:id="@+id/myImageView2" android:layout_width="104px" android:layout_height="157px" android:layout_x="101px" android:layout_y="119px" /> <!--建立第一個Button --> <Button android:id="@+id/myButton1" android:layout_width="105px" android:layout_height="66px" android:text="pic1" android:layout_x="9px" android:layout_y="356px" /> <!--建立第二個Button --> <Button android:id="@+id/myButton2" android:layout_width="105px" android:layout_height="66px" android:text="pic2" android:layout_x="179px" android:layout_y="356px" /></AbsoluteLayout>
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