是男人就下100层【第二层】——帮美女更衣（1）

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" >

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

    <Gallery
        android: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;
	@Override
	protected 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() {
			@Override
			public 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);
				
			}
			@Override
			public void onNothingSelected(AdapterView<?> parent) {
			}  
        });
		
		is.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v){
				
			}
		});
	}

	//设置图片切换的动画效果
	@Override
	public 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;
		}
		@Override
		public int getCount() {
			return 11;//11张图片
		}
		@Override
		public Object getItem(int position) {
			return position;
		}
		@Override
		public long getItemId(int position) {
			return position;
		}

		@Override
		public 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