滚动时列表视图图像发生变化

I am 解析 json数据在一个列表视图（图像视图和文本视图）.首先四项列表视图的图像和文本视图正确添加但是当我滚动列表视图时，图像视图中的图像正在发生变化。 这是我的代码..

适配器.java

 public class Adapter extends BaseAdapter {

private static final String TAG = "Adapter";
private Activity mActivity;
public ArrayList<Data> mObjects;

Context context;

static class ViewHolder {
    static ImageView icon;
    TextView title;
    TextView name;
    TextView review;
    DownloadImageTask mTask;
    String ab[];
    // DownloadImageTask1 mTask1;
    // ImageView photo;
}

public Adapter(Activity activity, Context context, ArrayList<Data> mObjects) {

    this.mActivity = (Activity) activity;
    this.context = context;
    this.mObjects = mObjects;

}

public void setObjects(ArrayList<Data> mObjects) {
    this.mObjects = mObjects;
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {

    final Data item = mObjects.get(position);
    View rowView = convertView;
    ViewHolder viewHolder;
    if (rowView == null) {
        LayoutInflater inflater = mActivity.getLayoutInflater();
        rowView = inflater.inflate(R.layout.item, parent, false);
        viewHolder = new ViewHolder();

        viewHolder.icon = (ImageView) rowView.findViewById(R.id.image);
        // viewHolder.photo = (ImageView) rowView.findViewById(R.id.photo);
        viewHolder.title = (TextView) rowView.findViewById(R.id.title);
        viewHolder.name = (TextView) rowView.findViewById(R.id.name);

        viewHolder.review = (TextView) rowView.findViewById(R.id.status);
        rowView.setTag(viewHolder);
    } 

    ViewHolder holder = (ViewHolder) rowView.getTag();

    holder.icon.setTag(position);

    holder.title.setText(item.getmTitle());
    // holder.name.setTag(position);
    holder.name.setText(item.getmConcatinate());

    holder.review.setText(item.getmreview());
    holder.icon.setBackgroundResource(R.drawable.ic_ab);
    holder.mTask = new DownloadImageTask(item.getmImageUrl(),

    holder.icon);
    if (!holder.mTask.isCancelled()) {
        holder.mTask.execute();
    }

    ViewHolder.icon.setTag(position);
    // }// update position because list view recycle

    ViewHolder.icon.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Log.d("Parsing JSON Data", "Before user try122222"); // perform
            // Object tag= v.getTag();
            Log.d("Parsing JSON Data", "abc");

            int clickedPosition = (Integer) v.getTag();

            Data clickedItem = mObjects.get(clickedPosition);
            // Object vi=row.getTag();

            String title = clickedItem.getmConcatinate();
            String picture = clickedItem.getmImageUrl();

            Intent intent = new Intent(v.getContext(), LargeView.class);
            Log.d("Parsing JSON Data", "Before user try444444");
            intent.putExtra("data", title);

            intent.putExtra("image3", picture);

            v.getContext().startActivity(intent);
            Log.d("Parsing JSON Data", "Before user try7777");
        }
    });

    return rowView;
}

@Override
public int getCount() {

    return (this.mObjects.size());
}

@Override
public Object getItem(int position) {

    return (this.mObjects.get(position));
}

@Override
public long getItemId(int position) {

    return (position);
}

public AbsListView.RecyclerListener mRecyclerListener = new RecyclerListener() {

    public void onMovedToScrapHeap(View view) {
        ViewHolder viewHolder = (ViewHolder) view.getTag();
        DownloadImageTask imagetask = viewHolder.mTask;

        if (imagetask != null) {
            imagetask.cancel(true);
        }

    }

};

}

main.java

     @Override
protected void onCreate(Bundle savedInstanceState) {
    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
            .detectAll().penaltyLog().build();
    StrictMode.setThreadPolicy(policy);

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_profile3);

    name = (TextView) findViewById(R.id.textView1);
    bmImage2 = (ImageView) findViewById(R.id.imageView1);
    address = (TextView) findViewById(R.id.textView2);
    gender = (TextView) findViewById(R.id.textView3);
    loyalitypoints = (TextView) findViewById(R.id.textView7);
    followers = (TextView) findViewById(R.id.textView8);
    following = (TextView) findViewById(R.id.textView9);
    // list13 = new ArrayList<HashMap<String, Object>>();
    mListView = (ListView) findViewById(android.R.id.list);
    mListView.setClickable(true);






    // mListView=(ListView)findViewById(R.id.list);
    mAdapter = new Adapter(this,c,mSource );
    mListView.setAdapter(mAdapter);
    Log.w("Parsing JSON Data", "Before Item click");


    mListView.setRecyclerListener(mAdapter.mRecyclerListener);

}

首先，您已将 ViewHolder 中的 imageView 引用设置为静态。您不应该这样做，因为每个 getView 都会简单地覆盖它，并且您将始终让每个视图的 ViewHolder 仅引用一个 ImageView。 其次，您应该始终记住 ListView 正在回收视图，因此如果您开始为一个视图加载图像然后滚动它，那么在加载图像时，同一视图可能已经代表了另一个列表视图项。 总的来说，在 ListView 中有效地显示位图是一项相当复杂的任务，涉及相当多的变量。我建议你阅读this http://developer.android.com/training/displaying-bitmaps/index.html并下载他们提供的代码示例。这是一个很好的起点，在简单的情况下可能足以复制粘贴。