要更新或刷新列表视图

Question

I have listview which is looking like below

it is one kind of Radio based application

in that when user tap on image AsyncTask will be called and Music will be played and getting some information which will be replaced with AMIT SIDDHPURA text

below is my code

    holder.imgPlay.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {

                    new MetadataTask2().execute(holder.txtMetadata);



                            }

    class StreamHolder {
        TextView txtStreamName;
        TextView txtStream;
        TextView txtMetadata;
        ImageView imgPlay;
    }

And MetaDataTask2 class code is below

   class MetadataTask2 extends AsyncTask<TextView, Void, IcyStreamMeta> {
    String title_artist;
    TextView txtView;

    @Override
    protected com.example.xmlparsingex.IcyStreamMeta doInBackground(TextView... arg0) {
        txtView = arg0[0];

        return streamMeta;
    }

    @Override
    protected void onPostExecute(IcyStreamMeta result) {
        try {
            txtView.setText("Hiiiiiiiiiii............");
            MCObjectMetadata.cancel();
            MCObjectMetadata = new MyCounterMetadata(10000, 1000);
            MCObjectMetadata.start();

            **adapter.notifyDataSetChanged();
            mainListView.setAdapter(adapter);
            mainListView.invalidate();**

            startService(new Intent(CompaniesList.this, NotifyService.class));

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        try {
            PD = ProgressDialog.show(CompaniesList.this, "Tuning...", "Please Wait...");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

but the problem is that listview is not updating means the orange text which is displaying in listview is not replacing with Hiiiiiii

Answer 1

如果它是一个ListView，我希望在Adapter的getView（）方法中更改textview……或者如果列表是由游标支持的，则在bindView（）中.....虽然我不确定您的方法。

Answer 2

You actually need to recreate your adapter instead of calling notifyDataSetChanged() . See this previous SO answer for an explanation.