Why Android is truncating my ActionBar title?

Question

In my app, I change the title in the ActionBar from each fragment displayed. When I first start my apps, I got a list of requests, so my title is \"My requests (20)\".

T

Answer 1

Because ListView / GridView / RecyclerView is called notifyDataSetChanged() at the same time. For some reason, this would cause layout update, which I guess result in the chaos of the action bar title's layout update.

Basically, you can postDelay() to update title to fix this problem, but I don't like this way.

I decide to override the BaseAdapter.notifyDateSetChanged() and update item view by hand. It works:

public abstract class BaseListAdapter> extends BaseAdapter {
    // data
    private List mList;
    // view holder
    private List mViewHolderList = new ArrayList<>();

    protected abstract void onBindViewHolder(VH holder, int position);

    protected abstract VH onCreateViewHolder(ViewGroup parent, int viewType);

    ...

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        VH viewHolder;
        if (convertView == null) {
            viewHolder = onCreateViewHolder(parent, getItemViewType(position));
            convertView = viewHolder.itemView;
            convertView.setTag(viewHolder);
            mViewHolderList.add(viewHolder);
        } else {
            //noinspection unchecked
            viewHolder = (VH) convertView.getTag();
        }

        viewHolder.setData(getItem(position));
        viewHolder.setPosition(position);
        onBindViewHolder(viewHolder, position);

        return convertView;
    }

    @Override
    public void notifyDataSetChanged() {
        if (mViewHolderList.size() == 0) {
            super.notifyDataSetChanged();
        } else {
            for (VH vh : mViewHolderList) {
                onBindViewHolder(vh, vh.getPosition());
            }
        }
    }

}

public class BaseListViewHolder {
    public View itemView;
    private T data;

    private int position;

    public BaseListViewHolder(View itemView) {
        this.itemView = itemView;
    }

    @Override
    public T getData() {
        return data;
    }

    @Override
    public void setData(T data) {
        this.data = data;
    }

    public int getPosition() {
        return position;
    }

    public void setPosition(int position) {
        this.position = position;
    }
}

Sorry for my bad english.