图片加载错位
ListView加载图片错位导致的原因：主要是View的复用，复用View的时候，除了在复用View的同时还会将相应的图片资源进行复用
public class MyBaseAdapter extends BaseAdapter {
privateList dataList;
private Context context;
public MyBaseAdapter(Context context,List dataList){
this.dataList = dataList;
this.context = context;
}
【图片加载错位】@Override
public int getCount() {
return dataList != null ? dataList.size() : 0;
}
@Override
public Object getItem(int position) {
return dataList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
if(convertView == null){
viewHolder = new ViewHolder();
convertView = convertView.inflate(context, R.layout.item,null);
viewHolder.ivIcon = (ImageView) convertView.findViewById(R.id.ivIcon);
viewHolder.tvContent = (TextView) convertView.findViewById(R.id.tvContent);
convertView.setTag(viewHolder);
}else{
viewHolder = (ViewHolder) convertView.getTag();
}
//填充数据
viewHolder.tvContent.setText("健康标题 : "+dataList.get(position).getTitle()+"\n健康相关描述 : "
+dataList.get(position).getDescription());
//设置一个标识
viewHolder.ivIcon.setTag(dataList.get(position).getImg());
//加载图片
loadImage(dataList.get(position).getImg(),viewHolder.ivIcon);
//设置一个默认图片
viewHolder.ivIcon.setImageResource(R.mipmap.ic_launcher_round);
return convertView;
}
/**
* 加载图片
*/
private void loadImage(final String path, final ImageView ivIcon){
new ImageLoadAsyncTask(new ImageLoadAsyncTask.NetworkBitmapListener() {
@Override
public void callBitmap(Bitmap bitmap) {
if(bitmap != null){
//如果传进来的图片地址与我们我们之前ImageView进行预设的标识相同的话
//就证明是同一张图片，就加载 //www.sina.com www.baidu.com
if(ivIcon.getTag() != null && path.equals(ivIcon.getTag()) ) {
ivIcon.setImageBitmap(bitmap);
}
}else{
ivIcon.setImageResource(R.mipmap.ic_launcher);
}
}
}).execute(path);
}
class ViewHolder{
ImageView ivIcon;
TextView tvContent;
}
}
