Android 带有SimpleCursorAdapter的ListView仅显示第一个值
尝试从simplecursoradaptor填充listview时,它将添加到视图中的只是来自游标的第一个条目,尽管游标确实包含所有数据 编辑:为了测试,我尝试将其更改为一个填充了静态数据的ArrayAdapter,得到了相同的结果 更多编辑:此外,我尝试使用ListFragment和android.R.layout.simple\u list\u item\u 1,但仍然得到了相同的结果 它的代码是 AllWeeksFragmentAndroid 带有SimpleCursorAdapter的ListView仅显示第一个值,android,listview,simplecursoradapter,Android,Listview,Simplecursoradapter,尝试从simplecursoradaptor填充listview时,它将添加到视图中的只是来自游标的第一个条目,尽管游标确实包含所有数据 编辑:为了测试,我尝试将其更改为一个填充了静态数据的ArrayAdapter,得到了相同的结果 更多编辑:此外,我尝试使用ListFragment和android.R.layout.simple\u list\u item\u 1,但仍然得到了相同的结果 它的代码是 AllWeeksFragment import android.app.Activity; i
import android.app.Activity;
import android.app.Fragment;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import us.emanon.timecard.db.HoursDataSource;
public class AllWeeksFragment extends Fragment {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
private HoursDataSource dataSource = HoursDataSource.getInstance(getActivity());
private Cursor mCursor;
// TODO: Rename and change types of parameters
public static AllWeeksFragment newInstance(String param1, String param2) {
AllWeeksFragment fragment = new AllWeeksFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
/**
* Mandatory empty constructor for the fragment manager to instantiate the
* fragment (e.g. upon screen orientation changes).
*/
public AllWeeksFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
dataSource.open();
mCursor = dataSource.getAllWeeks();
dataSource.displayCursor(mCursor);
}
ListView mListView;
private void displayList() {
Log.d(getClass().getSimpleName(), "count=" + mCursor.getCount());
String[] from = new String[] {
"_id",
"weekHours"
};
int[] to = new int[] {
R.id.allWeek,
R.id.allHours
};
MyCursorAdapter adapter = new MyCursorAdapter(
getActivity(),
R.layout.row_layout,
mCursor,
from,
to,
0
);
mListView.setAdapter(adapter);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_all_weeks, container, false);
mListView = (ListView)view.findViewById(R.id.all_list);
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (null != mListener) {
mListener.onFragmentInteraction(id);
}
}
});
displayList();
return view;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mListener = (OnFragmentInteractionListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnFragmentInteractionListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
@Override
public void onDestroy() {
super.onDestroy();
dataSource.close();
}
/**
* This interface must be implemented by activities that contain this
* fragment to allow an interaction in this fragment to be communicated
* to the activity and potentially other fragments contained in that
* activity.
* <p>
* See the Android Training lesson <a href=
* "http://developer.android.com/training/basics/fragments/communicating.html"
* >Communicating with Other Fragments</a> for more information.
*/
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
public void onFragmentInteraction(Long id);
}
//extend the SimpleCursorAdapter to create a custom class where we
//can override the getView to change the row colors
private class MyCursorAdapter extends SimpleCursorAdapter{
public MyCursorAdapter(Context context, int layout, Cursor c,
String[] from, int[] to, int flags) {
super(context, layout, c, from, to, flags);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Log.d(getClass().getSimpleName(), "position="+position);
//get reference to the row
View view = super.getView(position, convertView, parent);
//check for odd or even to set alternate colors to the row background
if(position % 2 == 0){
view.setBackgroundColor(Color.rgb(238, 233, 233));
}
else {
view.setBackgroundColor(Color.rgb(255, 255, 255));
}
return view;
}
}
}
fragment\u all\u weeks.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content"
android:id="@+id/allWeekRow">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:id="@+id/allWeek"
android:layout_weight="0.5" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:id="@+id/allHours"
android:layout_weight="0.5" />
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/listFrame">
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/all_header"
android:layout_alignParentTop="true">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="@string/Week"
android:id="@+id/textView"
android:layout_weight="0.5"
android:textStyle="bold"
android:gravity="center_horizontal" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="@string/Hours"
android:id="@+id/textView2"
android:layout_weight="0.5"
android:textStyle="bold"
android:gravity="center_horizontal" />
</LinearLayout>
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/all_list"
android:layout_alignParentLeft="false"
android:layout_marginLeft="0dp"
android:layout_alignParentTop="false"
android:layout_marginTop="0dp"
android:layout_below="@+id/all_header"
android:layout_alignLeft="@+id/all_header" />
</RelativeLayout>
带有一些调试的logcat输出表明一切都在那里
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ count=4
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 1 _id=34
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 1 weekHours=11.75
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 2 _id=35
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 2 weekHours=7
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 3 _id=36
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 3 weekHours=8.75
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 4 _id=37
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 4 weekHours=55.25
09-29 14:34:46.355 24370-24370/us.emanon.timecard D/AllWeeksFragment﹕ count=4
09-29 14:34:46.365 24370-24370/us.emanon.timecard D/MyCursorAdapter﹕ position=0
09-29 14:34:46.375 24370-24370/us.emanon.timecard D/MyCursorAdapter﹕ position=0
09-29 14:34:46.375 24370-24370/us.emanon.timecard D/MyCursorAdapter﹕ position=0
09-29 14:34:46.375 24370-24370/us.emanon.timecard D/MyCursorAdapter﹕ position=0
09-29 14:34:46.375 24370-24370/us.emanon.timecard D/MyCursorAdapter﹕ position=0
我尝试过移动东西,将它们放在不同的地方(onCreate、onCreateView等),将局部变量更改为字段等,所有操作都会得到相同的结果。我确信它很简单,但坦率地说,我就是找不到。发布片段布局。你在哪里添加此片段?已发布。我还试着去掉显示的_id,以防它弄脏了什么东西。不走运。从你发布的信息来看,似乎没有什么问题。检查你放置碎片的布局,看看你是否没有隐藏它或者限制它的大小。这就是问题所在。我忘了我用了一个滚动视图来包装我的容器的框架布局。在其他片段中解决的问题要小得多。我完全忘了在那里检查。谢谢
case 3:
fragment = AllWeeksFragment.newInstance(null, null);
tag = "all";
fragmentManager.beginTransaction()
.replace(R.id.container, fragment, tag)
.addToBackStack("home")
.commit();
break;
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ count=4
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 1 _id=34
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 1 weekHours=11.75
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 2 _id=35
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 2 weekHours=7
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 3 _id=36
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 3 weekHours=8.75
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 4 _id=37
09-29 14:34:46.345 24370-24370/us.emanon.timecard D/HoursDataSource﹕ 4 weekHours=55.25
09-29 14:34:46.355 24370-24370/us.emanon.timecard D/AllWeeksFragment﹕ count=4
09-29 14:34:46.365 24370-24370/us.emanon.timecard D/MyCursorAdapter﹕ position=0
09-29 14:34:46.375 24370-24370/us.emanon.timecard D/MyCursorAdapter﹕ position=0
09-29 14:34:46.375 24370-24370/us.emanon.timecard D/MyCursorAdapter﹕ position=0
09-29 14:34:46.375 24370-24370/us.emanon.timecard D/MyCursorAdapter﹕ position=0
09-29 14:34:46.375 24370-24370/us.emanon.timecard D/MyCursorAdapter﹕ position=0