去年有一段时间有一个应用下载量很高，都是男同志的功劳，现在又出了第二版，第二层我们就来实现一下《帮美女更衣》这个应用，很多男生应该熟悉这个应用了吧，这里我就不解释里面的内容了，呵呵。

先看看我们要实现的效果：

             （惨不忍睹！做好后大家去挖剩下的吧）

先看看布局文件activity_main.xml

<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent" ><ImageSwitcherandroid:id="@+id/image_switcher"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_alignParentLeft="true"android:layout_alignParentTop="true" /><Galleryandroid:id="@+id/gallery"android:layout_width="fill_parent"android:layout_height="80.0dip"android:layout_alignParentBottom="true"android:layout_alignParentLeft="true"android:background="#55000000"android:gravity="center_vertical"android:spacing="15.0dip" /></RelativeLayout>

ImageSwitcher继承自ViewSwitcher,重写了showNext()、showPrevious()方法。

使用ImageSwithcer的步骤如下：

1、为ImageSwitcher提供一个ViewFactory,该ViewFactory会有一个makeView()方法来生成View组件，这个组件必须是ImageView.

2、切换图片时只需要调用 setImageDrawable(Drawable drawable)方法、setImageResource(int resid)方法或setImageURI(Uri uri).

package com.example.mygrilproject;import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.Gallery.LayoutParams;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.ViewSwitcher.ViewFactory;public class MainActivity extends Activity implements ViewFactory{private ImageSwitcher is;private Gallery gallery;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//获取ImageSwitcher对象is = (ImageSwitcher)findViewById(R.id.image_switcher);is.setFactory(this);//获取gallery对象gallery = (Gallery)findViewById(R.id.gallery);//设置适配器gallery.setAdapter(new ImageAdapter(MainActivity.this));//设置监听gallery.setOnItemSelectedListener(new OnItemSelectedListener() {@Overridepublic void onItemSelected(AdapterView<?> parent, View view,int position, long id) {int drawableId = 0;try {drawableId = R.drawable.class.getDeclaredField("pre" + position).getInt(this);} catch (IllegalArgumentException e) {e.printStackTrace();} catch (SecurityException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();} catch (NoSuchFieldException e) {e.printStackTrace();}//更换ImageSwitcher中的图片is.setImageResource(drawableId);}@Overridepublic void onNothingSelected(AdapterView<?> parent) {}  });is.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){}});}//设置图片切换的动画效果@Overridepublic View makeView() {ImageView i = new ImageView(this);i.setBackgroundColor(0xFF000000);i.setScaleType(ImageView.ScaleType.FIT_CENTER);i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));return i;}private class ImageAdapter extends BaseAdapter {private Context mContext;public ImageAdapter(Context c){mContext = c;}@Overridepublic int getCount() {return 11;//11张图片}@Overridepublic Object getItem(int position) {return position;}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ImageView imageView = new ImageView(mContext);int drawableId = 0;try {//使用反射获取资源对象drawableId = R.drawable.class.getDeclaredField("pre" + position).getInt(this);} catch (IllegalArgumentException e) {e.printStackTrace();} catch (SecurityException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();} catch (NoSuchFieldException e) {e.printStackTrace();}imageView.setLayoutParams(new Gallery.LayoutParams(120,120));imageView.setScaleType(ScaleType.FIT_XY);imageView.setImageResource(drawableId);return imageView;}}}

运行效果：

下一篇我们再来看看如何撕衣服，呵呵

源代码下载：http://download.csdn.net/detail/lxq_xsyu/7014543