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在您问之前,我已经四处寻找解决问题的方法,但我自己无法解决,因此来找你们。

问题

我的光标有一个未捕获的异常问题,我无法解决......

错误

09-04 15:48:38.863: I/dalvikvm(1421): Uncaught exception thrown by finalizer (will be discarded):
09-04 15:48:38.863: I/dalvikvm(1421): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@44ef6598 on null that has not been deactivated or closed
09-04 15:48:38.863: I/dalvikvm(1421):   at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
09-04 15:48:38.873: I/dalvikvm(1421):   at dalvik.system.NativeStart.run(Native Method)

投诉的代码

public CCTrackLocation getTrackLocationForID(int id) {
        CCTrackLocation trackLocation = new CCTrackLocation();

        String selectQuery = "SELECT * FROM "+TABLE_TRACK_LOCATION+" WHERE \"id\" = "+ String.valueOf(id);

        SQLiteDatabase db = this.getReadableDatabase();
        Cursor cursor = db.rawQuery(selectQuery,null);
        if (cursor.moveToFirst()) {
            do {
                trackLocation.setID(cursor.getInt(0));
                trackLocation.segmentID = cursor.getInt(1);
                trackLocation.timestamp = cursor.getDouble(2);
                trackLocation.latitude = cursor.getDouble(3);
                trackLocation.longitude = cursor.getDouble(4);
                trackLocation.altitude = cursor.getDouble(5);
                trackLocation.velocity = cursor.getDouble(6);
                trackLocation.heading = cursor.getDouble(7);
                trackLocation.haccuracy = cursor.getDouble(8);
                trackLocation.vaccuracy = cursor.getDouble(9);
            }while(cursor.moveToNext());
        }

        cursor.close();
        db.close();

        return trackLocation;
    }

任何帮助将不胜感激。

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2 回答 2

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为了安全起见,将所有 db 代码放在 try/catch/finally 子句中,并将 cursor.close() 和 db.close() 移动到它的 finally 部分,以确保您正在关闭游标和 db即使之前抛出异常

于 2012-09-04T15:09:16.533 回答
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为了解决这个问题,我就是这样做的。

  1. 只打开和关闭数据库一次。即使我每次使用它都打开和关闭数据库,有时我认为它还不够快,因此我得到了错误。
  2. 每次我使用它并完成它后关闭光标。这解决了问题。
于 2012-09-11T10:04:59.943 回答