当我尝试在后台运行功能doTask()时崩溃。我正在尝试使用new Thread(new Runnable(){}),它仅在以下部分有效:
handlerForBar.post(new Runnable(){公共(public)无效run(){doTask();}})
但是当doTask()工作完成时,会显示progressBar。所以我认为AsyncTask可以工作,但是崩溃了。
public void doTask()
{
ListView listView = (ListView)findViewById(R.id.list);
myArray = new ArrayList<HashMap<String,Object>>();
HashMap<String, Object> hash_map;
hash_map = new HashMap<String, Object>();
hash_map.put(NICK_KEY, "nick");
myArray.add(hash_map);
listView.setAdapter(new myListAdapter(myArray,this));
new myListAdapter(myArray,this).notifyDataSetChanged();
}
private class myThread extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
doTask(); //try, catch also FC
return null;
}
...
}
* .java的结构:
> public class mainActivity extends Activity{}
> public void onCreate()
> new myThread().execute("");
> public void doTask()
> private class myThread extends AsyncTask<String, Void, String>{}
> protected String doInBackground()
> doTask()
> private class myListView extends BaseAdapter
最佳答案
您无法触摸doInBackground
中的UI,而必须使用onProgressUpdate
或onPostExecute
之类的方法来更新UI。参见here