Android(安卓)ImageSwithcher的使用

图片切换ImageSwitcher的使用:
package com.Aina.Android;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageSwitcher;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ViewSwitcher.ViewFactory;public class Test_ImageSwitcher extends Activity implements OnClickListener,ViewFactory{    /** Called when the activity is first created. *///所有要显示的图片资源索引private static final Integer[] imagelist = {R.drawable.img1,R.drawable.img2,R.drawable.img3,R.drawable.img4,R.drawable.img5,R.drawable.img6,R.drawable.img7,R.drawable.img8};private ImageSwitcher imageswitcher;private static int index = 0;//设置各组件IDprivate static final int Button_NEXT = 0x123456;private static final int Button_BACK = 0x123457;private static final int ImageSwitcher = 0x123458;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        //创建一个线性布局        LinearLayout layout = new LinearLayout(this);        layout.setOrientation(LinearLayout.HORIZONTAL);//水平布局        imageswitcher = new ImageSwitcher(this);        LinearLayout.LayoutParams p2 = new LinearLayout.LayoutParams(120,120);        layout.addView(imageswitcher,p2);        imageswitcher.setId(ImageSwitcher);//设置ID        imageswitcher.setFactory(this);//设置此对象的数据源        imageswitcher.setImageResource(imagelist[index]);                setContentView(layout);                //创建下一张按钮        Button next = new Button(this);        next.setId(Button_NEXT);        next.setText("下一张");        next.setOnClickListener(this);        LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(100,100);        layout.addView(next, p);        //创建上一张按钮        Button back = new Button(this);        back.setId(Button_BACK);        back.setText("上一张");        back.setOnClickListener(this);        layout.addView(back, p);    }@Overridepublic void onClick(View v) {if(v.getId()==Button_BACK){index--;if(index<0){index = imagelist.length-1;}imageswitcher.setImageResource(imagelist[index]);}else if(v.getId()==Button_NEXT){index++;if(index>=imagelist.length){index = 0;}imageswitcher.setImageResource(imagelist[index]);}}@Overridepublic View makeView() {Log.i("TAG", "makeView()");return new ImageView(this);}}
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