CursorIndexOutOfBoundsException问题：指数4要求，为4的大小 [英] CursorIndexOutOfBoundsException problem:Index 4 requested, with a size of 4
问题描述
我要显示每个厂商的AlertDialog，有一些说明，因为这，我使用这个code：
I want to display for each maker an AlertDialog that has some description, for that, i'm using this code:
protected boolean onTap(int index) {
db = openHelper.getWritableDatabase();
String[] result_columns = new String[] {COL_DESCRI};
Cursor cur = db.query(true, TABLE_COORD, result_columns,
null, null, null, null, null, null);
cur.moveToPosition(index);
String description = cur.getString(cur.getColumnIndexOrThrow("description"));
AlertDialog.Builder dialog = new AlertDialog.Builder(Geo.this);
dialog.setTitle("Infos.");
dialog.setMessage(description);
dialog.setPositiveButton("OK", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
dialog.show();
//cur.moveToNext();
cur.close();
db.close();
return true;
}
的问题，有一些标记的alertdialog结果是正确的，有一些人，当我点击它，我有一个FC。 logcat的：
The problem that there is some markers that the alertdialog result is correct, and there is some others that when i tap on it i have a FC. Logcat:
08-23 17:41:37.531: ERROR/AndroidRuntime(10004): Uncaught handler: thread main exiting due to uncaught exception
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): android.database.CursorIndexOutOfBoundsException: Index 4 requested, with a size of 4
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:580)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:214)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:41)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at carburant.android.com.Geo$ItemizedOverlayPerso.onTap(Geo.java:244)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at com.google.android.maps.ItemizedOverlay.onTap(ItemizedOverlay.java:453)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at com.google.android.maps.OverlayBundle.onTap(OverlayBundle.java:83)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at com.google.android.maps.MapView$1.onSingleTapUp(MapView.java:346)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.view.GestureDetector.onTouchEvent(GestureDetector.java:506)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at com.google.android.maps.MapView.onTouchEvent(MapView.java:628)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.view.View.dispatchTouchEvent(View.java:3709)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:852)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.os.Handler.dispatchMessage(Handler.java:99)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.os.Looper.loop(Looper.java:123)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at android.app.ActivityThread.main(ActivityThread.java:4363)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at java.lang.reflect.Method.invokeNative(Native Method)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at java.lang.reflect.Method.invoke(Method.java:521)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
08-23 17:41:37.550: ERROR/AndroidRuntime(10004): at dalvik.system.NativeStart.main(Native Method)
当我把 cur.moveToPosition（指数）; 在字符串描述= cur.getString（cur.getColumnIndexOrThrow（说明））; 我指数-1要求，具有4大小否则，像上面code 指数4要求，与4的大小
When i put cur.moveToPosition(index); under String description = cur.getString(cur.getColumnIndexOrThrow("description")); i have Index -1 requested, with a size of 4 otherwise, like above code Index 4 requested, with a size of 4
推荐答案
数组索引开始 0 ，不是 1 。你的第四个元素存储在索引 3 。
Array indexing starts with 0, not 1. your fourth element is stored at index 3.
当我把cur.moveToPosition（指数）;在字符串描述= cur.getString（cur.getColumnIndexOrThrow（说明））;我已经索引-1要求，具有4大小，否则，像上面code指数4要求，为4的尺寸
When i put cur.moveToPosition(index); under String description = cur.getString(cur.getColumnIndexOrThrow("description")); i have Index -1 requested, with a size of 4 otherwise, like above code Index 4 requested, with a size of 4
在该行集首先返回光标将在当前位置-1，这是第一行之前。
When the row set is first returned the cursor will be at positon -1, which is before the first row.
这篇关于CursorIndexOutOfBoundsException问题：指数4要求，为4的大小的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
