我正在创建一个运行三个片段的 Android 应用程序,每个片段包含一个列表视图。目前,我正在尝试使用我在 Parse.com 上创建的表中的内容填充其中一个列表视图。我遵循了本教程:http ://www.androidbegin.com/tutorial/android-parse-com-listview-images-and-texts-tutorial/并将其应用于我的片段中。问题是,每次我运行我的应用程序时,它都会加载大约 3 秒的数据,然后突然崩溃并给我这个错误:
ddmlib: Broken pipe
java.io.IOException: Broken pipe
at sun.nio.ch.FileDispatcher.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:29)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:69)
at sun.nio.ch.IOUtil.write(IOUtil.java:40)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:336)
at com.android.ddmlib.JdwpPacket.writeAndConsume(JdwpPacket.java:213)
at com.android.ddmlib.Client.sendAndConsume(Client.java:642)
at com.android.ddmlib.HandleHeap.sendREAQ(HandleHeap.java:348)
at com.android.ddmlib.Client.requestAllocationStatus(Client.java:488)
at com.android.ddmlib.DeviceMonitor.createClient(DeviceMonitor.java:835)
at com.android.ddmlib.DeviceMonitor.openClient(DeviceMonitor.java:803)
at com.android.ddmlib.DeviceMonitor.processIncomingJdwpData(DeviceMonitor.java:763)
at com.android.ddmlib.DeviceMonitor.deviceClientMonitorLoop(DeviceMonitor.java:652)
at com.android.ddmlib.DeviceMonitor.access$100(DeviceMonitor.java:44)
at com.android.ddmlib.DeviceMonitor$3.run(DeviceMonitor.java:580)
我完全不知道为什么会收到此错误。这是我试图从中填充列表视图的片段中的代码。我也在为列表视图使用自定义适配器,但我使用的是我的另一个项目中的同一个适配器,所以我确信它工作正常。为了获取数据,我调用 new RemoteDataTask().execute(); 在 onCreateView 。这就是我认为它出错的地方。我也确信我的所有表名在我的解析数据库中都是正确的。
public class fraternitiesFragment extends Fragment {
private SwipeRefreshLayout swipeLayoutFraternities;
private ListView fratList;
List<ParseObject> objList;
ProgressDialog mProgressDialog;
fraternitiesAdapter fratAdapter;
private List<Frat> fraternitiesList = null;
public fraternitiesFragment()
{
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.frat_fragment, null);
// Retrieve the SwipeRefreshLayout and ListView instances
swipeLayoutFraternities = (SwipeRefreshLayout)view.findViewById(R.id.swipe_refresh_fraternities);
swipeLayoutFraternities.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
new Handler().postDelayed(new Runnable() {
@Override public void run() {
swipeLayoutFraternities.setRefreshing(false);
}
}, 3000);
}
});
// Set the color scheme of the SwipeRefreshLayout by providing 4 color resource ids
swipeLayoutFraternities.setColorScheme(
R.color.tech_blue,
R.color.tech_gold,
R.color.tech_blue,
R.color.tech_gold);
new RemoteDataTask().execute();
return view;
}
private class RemoteDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog = new ProgressDialog(getActivity());
mProgressDialog.setTitle("Loading Fraternities");
mProgressDialog.setMessage("Loading...");
mProgressDialog.setIndeterminate(false);
mProgressDialog.show();
}
@Override
protected Void doInBackground(Void... params) {
fraternitiesList = new ArrayList<Frat>();
try{
ParseQuery<ParseObject> fraternitiesQuery = new ParseQuery<ParseObject>("Fraternities");
Log.i("Query", " Created");
fraternitiesQuery.orderByAscending("fratName");
objList = fraternitiesQuery.find();
for(ParseObject Fraternity : objList)
{
Frat fraternity = new Frat();
fraternity.setFratName((String) Fraternity.get("fratName"));
fraternity.setVoteCount((Integer) Fraternity.get("VoteCount"));
fraternitiesList.add(fraternity);
}
} catch (ParseException e)
{
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result)
{
fratList = (ListView)getActivity().findViewById(R.id.frat_list);
fratAdapter = new fraternitiesAdapter(getActivity(), fraternitiesList);
Log.d("Adapter Created", "Created");
mProgressDialog.dismiss();
fratList.setAdapter(fratAdapter);
}
}
}
我真的需要帮助找出导致此断管错误的问题所在。非常感谢任何帮助或反馈!