Question

我有一张桌子，我正在存储纬度和经度。我的表架构如下

TestId | Latitude | Longitude | TestName |

其中testid是INTEGER PRIMARY KEY AUTOINCREMENT。

现在，如果表存在相同的纬度和经度，则应更新之前的raw。我正在做下面的事。

将所有值添加到内容

ContentValues values = new ContentValues(); 
values.put(GLNetTestDataContract.TestPinRecord.COLUMN_NAME_TESTNAME, testName);
values.put(GLNetTestDataContract.TestPinRecord.COLUMN_NAME_LATTITUDE, lattitude);
values.put(GLNetTestDataContract.TestPinRecord.COLUMN_NAME_LATTITUDE, lattitude);

/ * 检查表中是否存在纬度和经度值，然后更新测试 /

        String selectionCheckLatitudeAndLongitude = Gaurav.TestRecord.COLUMN_NAME_LATTITUDE + "=? AND " +
                                            Gaurav.TestRecord.COLUMN_NAME_LATTITUDE + "=?";

        String[] selectionArgslCheckLatitudeAndLongitude = { String.valueOf(lattitude),String.valueOf(longitude)};
        try{
        newRowId = mDatabase.update(GLNetTestDataContract.TestPinRecord.TABLE_NAME, values, selectionCheckLatitudeAndLongitude, selectionArgslCheckLatitudeAndLongitude);
        }
        catch(Exception e)
        {
            mLogger.printLog("pin", "Exception while updating");
            mLogger.printLog("pin", e.getMessage());
        }
if(newRowId>0)
            mLogger.printLog("pin","Test updated with existing geo location");
        // Insert the new row, returning the primary key value of the new row
        else
        {
            newRowId = mDatabase.insert(GLNetTestDataContract.TestPinRecord.TABLE_NAME,null, values);
            mLogger.printLog("pin","Test inserted with existing geo location");
        }

它总是返回0.表示raw不更新。我究竟做错了什么。任何指针都会受到赞赏。

Answer 1

您要检查两次相同的列

Gaurav.TestRecord.COLUMN_NAME_LATTITUDE + "=? AND " +
Gaurav.TestRecord.COLUMN_NAME_LATTITUDE + "=?";

应该是：

Gaurav.TestRecord.COLUMN_NAME_LATTITUDE + "=? AND " +
Gaurav.TestRecord.COLUMN_NAME_LONGITUDE + "=?";

同样在您的put声明中：

values.put(GLNetTestDataContract.TestPinRecord.COLUMN_NAME_LATTITUDE, lattitude);
values.put(GLNetTestDataContract.TestPinRecord.COLUMN_NAME_LONGITUDE, longitude);

使用主要自动递增列更新原始

1 个答案: