Question

在我的代码中，我使用recylcer视图试图显示一些数据。

滚动后，图像总是乱糟糟的。

这是我的一些代码。

public class LeaderBoardAdapter extends UltimateViewAdapter<RecyclerView.ViewHolder> {

    private List<Profile> mProfilesList;
    private BaseActivity mBaseActivity;

    public LeaderBoardAdapter(final BaseActivity pBaseActivity, final List<Profile> pProfilesList) {
        mProfilesList = pProfilesList;
        mBaseActivity = pBaseActivity;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder pHolder, final int position) {
        final ViewHolder holder = (ViewHolder) pHolder;

       holder.paginationTextView.setText(mProfilesList.get(position).getPosition() + ".");
        holder.nameTextView.setText(mProfilesList.get(position).getProfile().getName());

        if (!TextUtils.isEmpty(mProfilesList.get(position).getProfile().getImage())) {
            Picasso
                    .with(mBaseActivity)
                    .load(mProfilesList.get(position).getProfile().getImage())
                    .placeholder(R.drawable.default_avatar)
                    .error(R.drawable.default_avatar)
                    .into(holder.userImageView);
        } else {
            holder.userImageView.setBackgroundResource(R.drawable.img_edit_profile_button);
        }

        if (position == 0 || position == 1 || position == 2) {
            holder.layout.setBackgroundColor(mBaseActivity.getResources().getColor(R.color.white));
        } else {
            holder.layout.setBackgroundColor(mBaseActivity.getResources().getColor(R.color.white_transparent));
        }


    }

    @Override
    public int getAdapterItemCount() {
        return mProfilesList.size();
    }

    @Override
    public int getItemCount() {
        return mProfilesList.size();
    }

    @Override
    public RecyclerView.ViewHolder getViewHolder(View view) {
        return new UltimateRecyclerviewViewHolder(view);
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.leaders_board_item, parent, false);
        ViewHolder vh = new ViewHolder(v);
        return vh;
    }

    @Override
    public long generateHeaderId(int position) {
        return 0;
    }

    @Override
    public RecyclerView.ViewHolder onCreateHeaderViewHolder(ViewGroup viewGroup) {
        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.leaders_board_item, viewGroup, false);
        return new RecyclerView.ViewHolder(view) {
        };
    }

    @Override
    public void onBindHeaderViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
    }

    class ViewHolder extends UltimateRecyclerviewViewHolder {

        TextView paginationTextView;
        TextView nameTextView;
        TextView securityIndexValueTextView;
        CircularImageView userImageView;
        ImageView securityIndexImageView;
        LinearLayout layout;

        public ViewHolder(View itemView) {
            super(itemView);

            paginationTextView = (TextView) itemView.findViewById(R.id.leaders_board_item_pagination_text_view);
            nameTextView = (TextView) itemView.findViewById(R.id.leaders_board_item_name_text_view);
            securityIndexValueTextView = (TextView) itemView.findViewById(R.id.leaders_board_item_security_index_value_text_view);
            userImageView = (CircularImageView) itemView.findViewById(R.id.leaders_board_item_user_image_view);
            securityIndexImageView = (ImageView) itemView.findViewById(R.id.leaders_board_item_security_index_image_view);
            layout = (LinearLayout) itemView.findViewById(R.id.leaders_board_item_layout);
        }

    }
}

这里有什么问题可以告诉我吗？

Answer 1

您未能将观看者回收考虑在内。你需要的是像

if (!TextUtils.isEmpty(mProfilesList.get(position).getProfile().getImage())) {
    Picasso.with(mBaseActivity)
           .load(mProfilesList.get(position).getProfile().getImage())
           .placeholder(R.drawable.default_avatar)
           .error(R.drawable.default_avatar)
           .into(holder.userImageView);
} else {
        // Cancel any pending requests to load an image into the imageview
        Picasso.with(mBaseActivity).cancelRequest(holder.userImageView);
        // Set the imageview to the default avatar
        holder.userImageView.setImageResource(R.drawable.default_avatar);
        holder.userImageView.setBackgroundResource(R.drawable.img_edit_profile_button);
}

Answer 2

final ViewHolder holder = (ViewHolder) pHolder;

这一行让我觉得你实施有问题。你不应该需要它来施展它。

请检查基本示例。

另一个问题可能是毕加索会使用缓存机制。我记得应该有防止它的方法。

如果您可以发布完整的适配器代码，我们可以查看更多

祝你好运

为什么图像重复（毕加索）

2 个答案: