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下面是来自我的活动的代码以及作为简单光标树适配器子类的内部类。问题是当我单击存在错误的子元素时

protected void onStart() {
    super.onStart();
    SQLiteDatabase db = new ToDoDatabase(getApplicationContext())
            .getWritableDatabase();
    Cursor cursor = db.query(true, ToDoDatabase.TABLE_NAME, null, null,
            null, null, null, null, null);
    CustomCursorTreeAdapter cursorTreeAdapter = new CustomCursorTreeAdapter(
            getApplicationContext(), cursor, R.layout.group_item_layout,
            new String[] { ToDoDatabase.TASK_NAME_FORMAT_DATE },
            new int[] { R.id.groupItem }, R.layout.child_item_layout,
            new String[] { ToDoDatabase.TASK_TIME },
            new int[] { R.id.childItem });
    drawerList.setAdapter(cursorTreeAdapter);
}

public class CustomCursorTreeAdapter extends SimpleCursorTreeAdapter {

    public CustomCursorTreeAdapter(Context context, Cursor cursor,
            int groupLayout, String[] groupFrom, int[] groupTo,
            int childLayout, String[] childFrom, int[] childTo) {
        super(context, cursor, groupLayout, groupFrom, groupTo,
                childLayout, childFrom, childTo);
    }

    @Override
    protected Cursor getChildrenCursor(Cursor group) {
        SQLiteDatabase db = new ToDoDatabase(getApplicationContext())
                .getWritableDatabase();
        return db
                .query(
                        ToDoDatabase.TABLE_NAME,
                        new String[] { ToDoDatabase.TASK_TIME },
                        ToDoDatabase.TASK_NAME_FORMAT_DATE + " = ? ",
                        new String[] { group.getString(group
                                .getColumnIndex(ToDoDatabase.TASK_NAME_FORMAT_DATE)) },
                        null, null, null, null);
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }
}

我的 logcat 的输出如下。此外，我为 expendableList groupitem 获得了相同的价值。例如，如果我有两个“A”，那么我会得到 2 个具有相同子项的“A”。我是一个 android 初学者

     10-14 23:52:11.908: E/AndroidRuntime(28080): java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow.  Make sure the Cursor is initialized correctly before accessing data from it.
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.database.CursorWindow.nativeGetLong(Native Method)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.database.CursorWindow.getLong(CursorWindow.java:515)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.database.AbstractWindowedCursor.getLong(AbstractWindowedCursor.java:75)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.widget.CursorTreeAdapter$MyCursorHelper.getId(CursorTreeAdapter.java:436)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.widget.CursorTreeAdapter.getChildId(CursorTreeAdapter.java:173)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.widget.ExpandableListConnector.getItemId(ExpandableListConnector.java:427)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.widget.AdapterView.getItemIdAtPosition(AdapterView.java:756)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.widget.AdapterView.setSelectedPositionInt(AdapterView.java:1128)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.widget.AbsListView.onTouchEvent(AbsListView.java:3165)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.View.dispatchTouchEvent(View.java:5604)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2054)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1815)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2060)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1829)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2060)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1829)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2060)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1829)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2060)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1829)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1917)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1376)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.app.Activity.dispatchTouchEvent(Activity.java:2364)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.support.v7.app.ActionBarActivityDelegateICS$WindowCallbackWrapper.dispatchTouchEvent(ActionBarActivityDelegateICS.java:255)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1865)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.View.dispatchPointerEvent(View.java:5784)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:2890)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2466)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewRootImpl.processInputEvents(ViewRootImpl.java:845)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2475)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.os.Handler.dispatchMessage(Handler.java:99)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.os.Looper.loop(Looper.java:137)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at android.app.ActivityThread.main(ActivityThread.java:4448)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at java.lang.reflect.Method.invokeNative(Native Method)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at java.lang.reflect.Method.invoke(Method.java:511)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at          com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590)
     10-14 23:52:11.908: E/AndroidRuntime(28080):   at dalvik.system.NativeStart.main(Native Method)
4

1 回答 1

5

正如@Selvin 所说，您的方法似乎有无效的回报getChildrenCursor()。

请参阅有关该方法的文档。

游标必须包含名为“_id”的列，否则此类将不起作用。

http://developer.android.com/reference/android/widget/CursorTreeAdapter.html

于 2013-10-14T18:43:22.133 回答