我想在滚动列表View时检索行的id。我收到错误和异常，如 java.lang.IllegalStateException：无法从CursorWindow读取第0行，第1列。确保Cursor在从中访问数据之前已正确初始化。在此行 strDescription = cursor.getString（1）;
这是我的活动代码
class MyListAdapter extends ArrayAdapter<All_Post>
{
Context context;
int layoutResourceId;
ArrayList<All_Post> data=new ArrayList<All_Post>();
public MyListAdapter(Context context, int layoutResourceId, ArrayList<All_Post> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public int getCount()
{
return data.size();
}
@Override
public long getItemId(int position)
{
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
Holder holder = null;
if(row == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new Holder();
holder.txt_Descid = (TextView)row.findViewById(R.id.textDescid);
holder.txtTitle = (TextView)row.findViewById(R.id.txt_Desc);
holder.txtInitialLetter = (TextView)row.findViewById(R.id.txt_InitialLetter);
holder.txtRemark = (TextView)row.findViewById(R.id.textRemark);
holder.imgBtn_Rework = (ImageView)row.findViewById(R.id.imgButtonRework);
holder.imgBtn_FollowUp = (ImageView)row.findViewById(R.id.imgButtonFoloowUp);
holder.imgBtn_RateEquipMent = (ImageView)row.findViewById(R.id.imgButtonRateEquipment);
holder.imgBtn_Camera = (ImageView)row.findViewById(R.id.imgButtonCamera);
holder.imgBtn_Audio = (ImageView)row.findViewById(R.id.imgButtonAudio);
holder.imgBtn_FollowInspector = (ImageView)row.findViewById(R.id.imgButtonFollowInspector);
holder.viewPager = (ViewPager)row.findViewById(R.id.Image_ViewPagers);
holder.viewPager.setPageMargin(-50);
holder.viewPager.setHorizontalFadingEdgeEnabled(true);
holder.viewPager.setFadingEdgeLength(20);
holder.viewPager.setClipToPadding(false);
holder.viewPager.setPadding(-5,0,0,0);
MyPagerAdapter adapter = new MyPagerAdapter(getContext());
holder.viewPager.setAdapter(adapter);
holder.viewPager.setCurrentItem(0);
row.setTag(holder);
}
else
{
holder = (Holder)row.getTag();
}
All_Post all_Post = data.get(position);
holder.txt_Descid.setText(Integer.toString(all_Post.getID()));
String strTextDescId = holder.txt_Descid.getText().toString().trim();
Log.e("strTextDescId "," = "+strTextDescId);
getActivityObjectId(strTextDescId);
holder.txtTitle.setText(all_Post.getName());
String strTxtTitle = holder.txtTitle.getText().toString().trim();
Log.e("strTxtTitle "," = "+strTxtTitle);
holder.txtInitialLetter.setText(all_Post.getInitName());
holder.txtRemark.setText(all_Post.getStrDesc());
holder.imgBtn_Rework.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
Log.e("Button click ","event is fire");
}
});
return row;
}
class Holder
{
TextView txt_Descid;
TextView txtTitle;
TextView txtInitialLetter;
TextView txtRemark;
ViewPager viewPager;
ImageView imgBtn_Rework;
ImageView imgBtn_FollowUp;
ImageView imgBtn_RateEquipMent;
ImageView imgBtn_Camera;
ImageView imgBtn_Audio;
ImageView imgBtn_FollowInspector;
}
}
private void getActivityObjectId(String descriptionID)
{
try {
dbhelper = new MyDbHelper(this);
SQLiteDatabase db=dbhelper.getReadableDatabase();
Cursor cursor = db.rawQuery("select activityId from ALLPost_Description where " + "descid" + " = ?",
new String[]{descriptionID});
if(cursor != null) {
cursor.moveToFirst();
strDescription = cursor.getString(1);
System.out.println(" activityId =" + strDescription);
Log.e(" strDescription ", " = " + strDescription);
}
cursor.close();
db.close();
}
catch (Exception e)
{
// TODO: handle exception
e.printStackTrace();
}
}
这是我的LogCat错误信息
08-06 04:46:25.923 4206-4206/? E/strTxtTitle﹕ = JIBE Admin@AKARI
08-06 04:46:26.003 4206-4206/? E/strTextDescId﹕ = 2
08-06 04:46:26.003 4206-4206/? E/Construct In MyDbHelper﹕ !!!
08-06 04:46:26.043 4206-4206/? E/CursorWindow﹕ Failed to read row 0, column 1 from a CursorWindow which has 1 rows, 1 columns.
08-06 04:46:26.053 4206-4206/? W/System.err﹕ java.lang.IllegalStateException: Couldn't read row 0, col 1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.
08-06 04:46:26.073 4206-4206/? W/System.err﹕ at android.database.CursorWindow.nativeGetString(Native Method)
08-06 04:46:26.073 4206-4206/? W/System.err﹕ at android.database.CursorWindow.getString(CursorWindow.java:434)
08-06 04:46:26.073 4206-4206/? W/System.err﹕ at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)
08-06 04:46:26.073 4206-4206/? W/System.err﹕ at com.example.tazeen.classnkk.AllPosts_Page.getActivityObjectId(AllPosts_Page.java:627)
08-06 04:46:26.073 4206-4206/? W/System.err﹕ at com.example.tazeen.classnkk.AllPosts_Page.access$100(AllPosts_Page.java:72)
08-06 04:46:26.083 4206-4206/? W/System.err﹕ at com.example.tazeen.classnkk.AllPosts_Page$MyListAdapter.getView(AllPosts_Page.java:483)
08-06 04:46:26.083 4206-4206/? W/System.err﹕ at android.widget.AbsListView.obtainView(AbsListView.java:2177)
08-06 04:46:26.093 4206-4206/? W/System.err﹕ at android.widget.ListView.makeAndAddView(ListView.java:1840)
08-06 04:46:26.093 4206-4206/? W/System.err﹕ at android.widget.ListView.fillDown(ListView.java:675)
08-06 04:46:26.103 4206-4206/? W/System.err﹕ at android.widget.ListView.fillFromTop(ListView.java:736)
08-06 04:46:26.103 4206-4206/? W/System.err﹕ at android.widget.ListView.layoutChildren(ListView.java:1655)
08-06 04:46:26.103 4206-4206/? W/System.err﹕ at android.widget.AbsListView.onLayout(AbsListView.java:2012)
08-06 04:46:26.103 4206-4206/? W/System.err﹕ at android.view.View.layout(View.java:14289)
08-06 04:46:26.123 4206-4206/? W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4562)
08-06 04:46:26.123 4206-4206/? W/System.err﹕ at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
08-06 04:46:26.123 4206-4206/? W/System.err﹕ at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
08-06 04:46:26.133 4206-4206/? W/System.err﹕ at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
08-06 04:46:26.143 4206-4206/? W/System.err﹕ at android.view.View.layout(View.java:14289)
08-06 04:46:26.143 4206-4206/? W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4562)
08-06 04:46:26.143 4206-4206/? W/System.err﹕ at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
08-06 04:46:26.153 4206-4206/? W/System.err﹕ at android.view.View.layout(View.java:14289)
08-06 04:46:26.153 4206-4206/? W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4562)
08-06 04:46:26.153 4206-4206/? W/System.err﹕ at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
08-06 04:46:26.173 4206-4206/? W/System.err﹕ at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
08-06 04:46:26.173 4206-4206/? W/System.err﹕ at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
08-06 04:46:26.173 4206-4206/? W/System.err﹕ at android.view.View.layout(View.java:14289)
08-06 04:46:26.173 4206-4206/? W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4562)
08-06 04:46:26.173 4206-4206/? W/System.err﹕ at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
08-06 04:46:26.193 4206-4206/? W/System.err﹕ at android.view.View.layout(View.java:14289)
08-06 04:46:26.193 4206-4206/? W/System.err﹕ at android.view.ViewGroup.layout(ViewGroup.java:4562)
08-06 04:46:26.193 4206-4206/? W/System.err﹕ at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1976)
08-06 04:46:26.203 4206-4206/? W/System.err﹕ at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1730)
08-06 04:46:26.203 4206-4206/? W/System.err﹕ at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
08-06 04:46:26.203 4206-4206/? W/System.err﹕ at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481)
08-06 04:46:26.203 4206-4206/? W/System.err﹕ at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
08-06 04:46:26.223 4206-4206/? W/System.err﹕ at android.view.Choreographer.doCallbacks(Choreographer.java:562)
08-06 04:46:26.223 4206-4206/? W/System.err﹕ at android.view.Choreographer.doFrame(Choreographer.java:532)
08-06 04:46:26.223 4206-4206/? W/System.err﹕ at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
08-06 04:46:26.223 4206-4206/? W/System.err﹕ at android.os.Handler.handleCallback(Handler.java:730)
08-06 04:46:26.223 4206-4206/? W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:92)
08-06 04:46:26.233 4206-4206/? W/System.err﹕ at android.os.Looper.loop(Looper.java:137)
08-06 04:46:26.233 4206-4206/? W/System.err﹕ at android.app.ActivityThread.main(ActivityThread.java:5103)
08-06 04:46:26.243 4206-4206/? W/System.err﹕ at java.lang.reflect.Method.invokeNative(Native Method)
08-06 04:46:26.253 4206-4206/? W/System.err﹕ at java.lang.reflect.Method.invoke(Method.java:525)
08-06 04:46:26.253 4206-4206/? W/System.err﹕ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
08-06 04:46:26.253 4206-4206/? W/System.err﹕ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
08-06 04:46:26.253 4206-4206/? W/System.err﹕ at dalvik.system.NativeStart.main(Native Method)
感谢高级
答案 0 :(得分：3)
尝试改变
strDescription = cursor.getString(1);
到
strDescription = cursor.getString(0);
当您尝试仅检索一个activityId