Android 关于viewpager中图片的缩放功能

关于这个问题  本人也是困惑已久   终于得到实现办法  通过在Viewpager中添加点击事件 这里就是图片的缩放功能 通过list<image>  定义imageadapeter 来继承pageradapter

本文链接来自边强http://write.blog.csdn.net/postedit?ref=toolbar

还要运用到library.jar包  包的下载地址是http://download.csdn.net/detail/siliyu/7038547

下面开始写代码

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    xmlns:tools="http://schemas.android.com/tools"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent"  
     android:background="#E3E2E2"
    tools:context=".MainActivity" >  
  

    
   <com.elife.tools.MyViewPager 
	    android:id="@+id/my_pager"
	    android:layout_width="match_parent"
	 
	    android:layout_below="@+id/voice_heade"
	    android:layout_height="match_parent"
	    />
          
</RelativeLayout>  

package com.elife.tools;

import android.content.Context;
import android.graphics.Bitmap;
import uk.co.senab.photoview.PhotoView;

public class MyPhotoView extends PhotoView{

	public MyPhotoView(Context context) {
		super(context);
	}
	
	/**
     * 初始化ImageView图片
     * @param bitmap
     */
    public void setImage(Bitmap bitmap) {
        super.setImageBitmap(bitmap);
        if (null != mAttacher) {
            mAttacher.update();
        }
    }
}

package com.elife.tools;

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.MotionEvent;

public class MyViewPager extends ViewPager {

	public MyViewPager(Context context) {
		super(context);
		// TODO Auto-generated constructor stub
	}
	
	//这个构造方法必须有要不然xml中无法加载 会报错
	public MyViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
	
	//这个方法是为了避免手势滑动的时候产生异常
	@Override
	public boolean onInterceptTouchEvent(MotionEvent ev) {
		try {
			return super.onInterceptTouchEvent(ev);
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
			return false;
		}
	}
}

package com.elife.property;

import java.util.ArrayList;
import java.util.List;

import com.elife.app.R;
import com.elife.tools.Image;
import com.elife.tools.MyPhotoView;
import com.elife.tools.MyViewPager;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;

public class Property_Viewpager extends Activity {
	private MyViewPager pager;
	private List<Image> images;
	private ImageAdapter adapter;
	
	private static int[] sDrawables = {R.drawable.demo, R.drawable.demo, R.drawable.demo,
		R.drawable.demo};
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.view_pager);
		pager = (MyViewPager) findViewById(R.id.my_pager);
		System.out.println("pager:"+pager);
		images = new ArrayList<Image>();
		init();
		pager.setAdapter(new ImageAdapter(images));
	}
	
	private void init(){
		for(int i = 0; i < sDrawables.length; i++){
			BitmapDrawable bd = (BitmapDrawable) getResources().getDrawable(sDrawables[i]);
			Bitmap bm = bd.getBitmap();
			Image image = new Image();
			image.setBitmap(bm);
			images.add(image);
		}
	}
	
	public class ImageAdapter extends PagerAdapter{
		private List<Image> list;
		public ImageAdapter(List<Image> list){
			this.list = list;
		}
		
		@Override
		public View instantiateItem(ViewGroup container, int position) {
			Image image = list.get(position);
			
			MyPhotoView photoView = null;
			if(null != image){
				System.out.println("context:"+container.getContext());
				photoView = new MyPhotoView(container.getContext());
				photoView.setImage(image.getBitmap());
			}
			container.addView(photoView, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
			return photoView;
		}

		@Override
		public void destroyItem(ViewGroup container, int position, Object object) {
			container.removeView((View) object);
		}

		@Override
		public boolean isViewFromObject(View view, Object object) {
			return view == object;
		}

		@Override
		public int getCount() {
			return images.size();
		}
		
	}
}