Question

我有一个SQLite数据库，它存储所有坐标+描述，以便在录制标记时显示它们。我正在使用此代码来检索所有描述：

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.moveToFirst();
             while (cur.isAfterLast() == false) {
                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;

然而，我有一个奇怪的问题，表明我没有说明栏，我很确定我有它。

08-23 02:45:02.848: ERROR/AndroidRuntime(287): Uncaught handler: thread main exiting due to uncaught exception
08-23 02:45:02.890: ERROR/AndroidRuntime(287): android.database.sqlite.SQLiteException: no such column: Description: , while compiling: SELECT DISTINCT Description FROM table_coordonnées
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.database.sqlite.SQLiteProgram.native_compile(Native Method)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.database.sqlite.SQLiteProgram.compile(SQLiteProgram.java:110)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:59)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:49)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:49)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1220)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1107)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1065)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at carburant.android.com.Geo$ItemizedOverlayPerso.onTap(Geo.java:239)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at com.google.android.maps.ItemizedOverlay.onTap(ItemizedOverlay.java:453)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at com.google.android.maps.OverlayBundle.onTap(OverlayBundle.java:83)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at com.google.android.maps.MapView$1.onSingleTapUp(MapView.java:346)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.view.GestureDetector.onTouchEvent(GestureDetector.java:506)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at com.google.android.maps.MapView.onTouchEvent(MapView.java:628)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.view.View.dispatchTouchEvent(View.java:3709)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:852)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.os.Looper.loop(Looper.java:123)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at android.app.ActivityThread.main(ActivityThread.java:4363)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at java.lang.reflect.Method.invokeNative(Native Method)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at java.lang.reflect.Method.invoke(Method.java:521)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
08-23 02:45:02.890: ERROR/AndroidRuntime(287):     at dalvik.system.NativeStart.main(Native Method)

请问有什么问题？谢谢你的帮助。

Answer 1

它看起来像“没有这样的列：描述”，所以你必须检查一次数据库，并且你的方向也是错误的。

您正在onTap()方法中获取坐标，在获取光标后，您将获取循环并在循环中编写显示对话框的代码。

所以your code will give you description of only last record.

你必须为所有坐标创建描述数组，然后在onTap(int index)中你需要得到坐标using index variable of onTap(int index) method

Answer 2

请检查您的创建语句和查询。我会到处使用小写。在编辑中，您可以编写coordoonnees和table_coordoonnees。两者都不匹配。

SQLites错误消息总是非常有用。如果SQLite告诉您有关缺少的表或列，则此项目将被定义为缺失或拼写错误。

想要检索SQlite数据并将其设置为映射标记[ForceClose]

2 个答案: