ImageSwitch和TextSwitch

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

    <ImageSwitcher
        android:id="@+id/imageSwitcher"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true" >
    </ImageSwitcher>

    <TextSwitcher
        android:id="@+id/textSwitcher"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/previous"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="上一张" >
        </Button>

        <Button
            android:id="@+id/next"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="下一张" >
        </Button>
    </LinearLayout>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">ImageTextSwitcher</string>
    <string name="photo_1">图片1</string>
    <string name="photo_2">图片2</string>
    <string name="photo_3">图片3</string>
    <string name="photo_4">图片4</string>
    <string name="photo_5">图片5</string>
    <string name="photo_6">图片6</string>
    <string name="photo_7">图片7</string>
</resources>

package com.android;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.TextSwitcher;
import android.widget.TextView;
import android.widget.ViewSwitcher.ViewFactory;

public class ActivityMain extends Activity {
	
	private ImageSwitcher mImageSwitcher;
	private TextSwitcher mTextSwitcher;
	//当前显示的索引
	private int current;
	//图片资源
    private Integer[] mImageIds = {
            R.drawable.photo_1, R.drawable.photo_2, R.drawable.photo_3,
            R.drawable.photo_4, R.drawable.photo_5, R.drawable.photo_6,
            R.drawable.photo_7};
    //文本资源
    private Integer[] mTextIds = {
            R.string.photo_1, R.string.photo_2, R.string.photo_3,
            R.string.photo_4, R.string.photo_5, R.string.photo_6,
            R.string.photo_7};

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //获取ImageSwitcher对象
        mImageSwitcher = (ImageSwitcher) findViewById(R.id.imageSwitcher);
        //设置ViewFactory
        mImageSwitcher.setFactory(new ViewFactory (){
			@Override
			public View makeView() {
				//ImageSwitcher需要返回ImageView对象
		        ImageView i = new ImageView(ActivityMain.this);
		        i.setBackgroundColor(0xFF000000);
		        i.setScaleType(ImageView.ScaleType.FIT_CENTER);
		        i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT,
		                LayoutParams.FILL_PARENT));
		        return i;
			}
        	
        });
        //设置动画淡然淡出效果
        mImageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
                android.R.anim.fade_in));
        mImageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
                android.R.anim.fade_out));
        //默认值
        mImageSwitcher.setImageResource(mImageIds[0]);
        current = 0;
        
        //TextSwitcher例子
        mTextSwitcher = (TextSwitcher) findViewById(R.id.textSwitcher);
        mTextSwitcher.setFactory(new ViewFactory (){

			@Override
			public View makeView() {
				// TODO Auto-generated method stub
				//ImageSwitcher需要返回ImageView对象
				//TextSwitcher需要返回TextView对象
		        TextView i = new TextView(ActivityMain.this);
		        i.setTextSize(25);
		        return i;
			}
        	
        });
        mTextSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
                android.R.anim.slide_in_left));
        mTextSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
                android.R.anim.slide_out_right));
        mTextSwitcher.setText(this.getResources().getText(mTextIds[0]));
        //按钮定义
        Button previousBtn = (Button) findViewById(R.id.previous);
        Button nextBtn = (Button) findViewById(R.id.next);
        
        previousBtn.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				if(current>0){
					current--;
					//设置ImageSwitcher要显示的图片
					mImageSwitcher.setImageResource(mImageIds[current]);
					mTextSwitcher.setText(ActivityMain.this.getResources().getText(mTextIds[current]));
				}
			}
        	
        });
        
        nextBtn.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				if(current<mImageIds.length-1){
				  current++;
				  mImageSwitcher.setImageResource(mImageIds[current]);
				  mTextSwitcher.setText(ActivityMain.this.getResources().getText(mTextIds[current]));
				}
			}
        	
        });
       
    }

}