Question

我有一个RecyclerView，我通过检测RecyclerView的结束从我的数据库中加载10到10个项目。我的问题：装载物品后，当我滚动时，RecyclerView会在1-2秒内冻结。我认为问题来自每个项目中的ImageView。每次加载后，最后一个列表会添加到适配器，如下所示：arrayAdapter.list.addAll(questions);然后arrayAdapter.notifyDataSetChanged();

我的adpater：

@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
    final Question question = list.get(position);
    holder.tvOwner.setText("Question posée par " + question.ownerUsername);
    holder.tvQuestion.setText(question.question);

    if (question.image != null) {
        holder.questionImage.setImageBitmap(question.image);
        holder.questionImage.setVisibility(View.VISIBLE);
        holder.questionImage.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                NavigationMenu nav = (NavigationMenu) context;
                nav.showPictureFullScreen(question.image);
            }
        });
    } else {
        holder.questionImage.setImageBitmap(null);
        holder.questionImage.setVisibility(View.GONE);
    }

Answer 1

感谢Pavan

public class SetImageBitmap extends AsyncTask<Void, Void, Bitmap> {
    Question q;
    ImageView iv;

    public SetImageBitmap(Question q, ImageView iv) {
        this.q = q;
        this.iv = iv;
    }

    @Override
    protected Bitmap doInBackground(Void... params) {
        return q.image;
    }

    @Override
    protected void onPostExecute(Bitmap bitmap) {
        iv.setImageBitmap(bitmap);
        iv.setVisibility(View.VISIBLE);
    }
}

Android - RecyclerView加载后冻结

1 个答案: