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Update ListView in the main thread from another thread

(6个答案)


5年前关闭。




我正在使用Android的新RecyclerView,但是无论何时调用“notify”方法之一,都无法刷新自定义适配器。

我试过调用notifyDataSetChanged,notifyItemRangeInserted和notifyItemInserted,它们似乎都不起作用。

这是我的自定义适配器的代码。我基本上是在尝试刷新字符串列表:
package com.mycompany.myapp.adapters;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.mycompany.myapp.R;

import java.util.List;

public class FeedAdapter extends RecyclerView.Adapter<FeedAdapter.ViewHolder> {

    private List<String> mDataset;

    public FeedAdapter(List<String> dataset) {
        super();
        mDataset = dataset;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int i) {
        LinearLayout v = (LinearLayout) LayoutInflater.from(parent.getContext())
                .inflate(R.layout.list_item_feed, parent, false);
        v.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT));
    return new ViewHolder(v);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.setText(mDataset.get(position));
    }

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

    public void setDataset(List<Status> dataset) {
        mDataset = dataset;
        // This isn't working
        notifyItemRangeInserted(0, mDataset.size());
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        private TextView mFeedText;

        public ViewHolder(View v) {
            super(v);
            mFeedText = (TextView) v.findViewById(R.id.feed_text);
        }

        private void setText(String text) {
            mFeedText.setText(text);
        }
    }
}

还有谁有相同的问题吗?

谢谢!

最佳答案

我的问题是我没有在主线程上通知更改,因此该更改不立即可见。 here指出了同样的问题。

07-24 09:50
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