解决Android快速滑动时图片一闪一闪问题

快速滑动图片一闪一闪的问题，图片加载等处理在这里不介绍，主要就是介绍下在adapter中维护一个linkedhashmap解决上述问题

package com.longraise.seller.adapter;
 
import android.content.context;
import android.graphics.bitmap;
import android.graphics.drawable.bitmapdrawable;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import android.widget.abslistview;
import android.widget.baseadapter;
import android.widget.imageview;
import android.widget.listview;
import android.widget.textview;
 
import com.longraise.seller.r;
import com.longraise.seller.view.voicebutton;
 
import java.lang.ref.softreference;
import java.util.linkedhashmap;
import java.util.list;
import java.util.map;
 
import cc.sdkutil.control.image.ccimageloader;
import cc.sdkutil.control.image.ccimageloadercallback;
import cc.sdkutil.control.inject.ccinjectutil;
import cc.sdkutil.model.inject.ccinjectres;
 
/**
 * created by wangcong on 15-1-8.
 */
public class orderfinishadapter extends baseadapter {
 
  //convertview id
  private final static int base_id = 0x0fff00;
 
  private context mcontext;
  private list<map<string, object>> malllist;
 
  //图片加载相关
  ccimageloader mimageloader;
  //用于缓存图片，减小快速滑动时图片显示落帧现象
  final linkedhashmap<string, softreference<bitmap>> linkedhashmap;
  final int max_size = 16;
 
  public orderfinishadapter(context context, list<map<string, object>> list) {
    this.mcontext = context;
    this.malllist = list;
    linkedhashmap = new linkedhashmap<string, softreference<bitmap>>(16, 0.75f, true) {
 
      private static final long serialversionuid = 1l;
 
      @override
      protected boolean removeeldestentry(entry<string, softreference<bitmap>> eldest) {
        boolean flag = size() > max_size;
        if (flag) {
          softreference<bitmap> softreference = eldest.getvalue();
          bitmap bitmap = softreference.get();
          if (bitmap != null) bitmap.recycle();
          remove(eldest.getkey());
        }
        return flag;
      }
    };
  }
 
  public int getcount() {
    return malllist.size();
  }
 
  public object getitem(int position) {
    return malllist.get(position);
  }
 
  public long getitemid(int position) {
    return position;
  }
 
  @suppresswarnings("deprecation")
  public view getview(int position, view convertview, viewgroup parent) {
    viewholder holder = null;
    if (convertview == null) {
      convertview = layoutinflater.from(mcontext).inflate(r.layout.adapter_finish_item, parent, false);
      holder = new viewholder();
      ccinjectutil.inject(holder, convertview);
      convertview.settag(holder);
    } else {
      holder = (viewholder) convertview.gettag();
    }
    convertview.setid(base_id + position);
    final map<string, object> map = malllist.get(position);
    //处理图片
    softreference<bitmap> softreference = linkedhashmap.get(map.get("orderimgurl"));
    bitmap bitmap = softreference == null ? null : softreference.get();
    if (bitmap == null) {
      holder.image.setbackgroundresource(r.drawable.default_image_error);
      if (mimageloader == null)
        mimageloader = new ccimageloader.builder().needcacheindisk().outsize(120, 120)
            .callback(new ccimageloadercallback() {
              @override
              public void onsuccess(bitmap bitmap, object... objs) {
                super.onsuccess(bitmap, objs);
                if (bitmap != null) { //图片加载成功后处理
                  imageview imageview = (imageview) objs[0];
                  imageview.setbackgrounddrawable(new bitmapdrawable(mcontext.getresources(), bitmap));
                  softreference<bitmap> soft = new softreference<bitmap>(bitmap);
                  linkedhashmap.put(objs[1] + "", soft);
                  bitmap = null;
                }
              }
            }).build();
      mimageloader.loadnetimage(map.get("orderimgurl") + "", holder.image, map.get("orderimgurl"));
    } else {
      holder.image.setbackgrounddrawable(new bitmapdrawable(mcontext.getresources(), bitmap));
    }
 
    
    return convertview;
  }
 
  static class viewholder {
 
    @ccinjectres(r.id.order_item_image)
    imageview image;
  }
}

以上所述就是本文的全部内容了，希望大家能够喜欢。