java - Android GridView 适配器与 AsyncTask

Question

我从网络解析 XML，我想将此数据放入其他 Activity 中的 GridView，你能帮我吗？

我的第一个 Activity :

public class HomeScreenActivity extends Activity {
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.imageButton:
            Intent intent = new Intent(this, TopArtistsScreen.class);
            intent.putExtra("username", username);
            new DownloadXmlTask(this, HomeScreenActivity.this)
                    .execute("URL");
            startActivity(intent);
}

我的异步任务

public class DownloadXmlTask extends AsyncTask<String, Void, List<Artist>> {
    @Override
    protected void onPostExecute(List<Artist> result) {
        progressDialog.dismiss();
        gridView.setAdapter(new TopArtistsImageAdapter(context, result));
}

TopArtistsImageAdapter

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View view = convertView;
    if(convertView==null) {
        view = inflater.inflate(R.layout.items, null);
    }
    TextView textView = (TextView) view.findViewById(R.id.grid_item_name);
    ImageView imageView = (ImageView) view.findViewById(R.id.grid_item_image);
    textView.setText(artistsList.get(position).getName());
    imageLoader.DisplayImage(artistsList.get(position).getImage(), imageView);
    return view;
}

PS 我应该在下载所有信息后才开始另一个 Activity

Answer 1

只有在下载完所有信息后我才能开始另一个 Activity => 进行如下更改:

1) 仅在单击按钮时执行 AsyncTask

new DownloadXmlTask(this, HomeScreenActivity.this).execute("URL");

2) 在 AsyncTask 的 onPostExecute() 方法中启动 Activity:

Intent intent = new Intent(HomeScreenActivity.this, TopArtistsScreen.class);
intent.putExtra("username", username);
startActivity(intent);