Android: SQLite Constraint failed 问题

Question

在我的应用程序中，我使用的是 SQLite 数据库。在我的一个表中插入数据时，我遇到了“SQLite 异常:错误 19”的奇怪问题。第一次插入数据，但当我再次尝试插入数据时，它抛出异常。

我的创建表查询:

"CREATE TABLE Tickets ("
            + "ID integer PRIMARY KEY NOT NULL,"
            + " UID varchar(40) NOT NULL DEFAULT 'not available'," + " OrderID int NOT NULL,"
            + " CarrierTicketNum varchar(15) NOT NULL,"
            + " TicketTypeID int NOT NULL," + " TankTypeID int NULL,"
            + " ProductObsGravity numeric NULL DEFAULT 0,"
            + " ProductHighTemp numeric NULL DEFAULT 0,"
            + " ProductLowTemp numeric NULL DEFAULT 0,"
            + " ProductObsTemp numeric NULL DEFAULT 0,"
            + " ProductBSW numeric NULL DEFAULT 0");

插入查询:

public void insertTank(int OrderID, int TicketTypeID,
        String CarrierTicketNum, String TankNum, int TankTypeID,
        Double ProductObsTemp, Double ProductObsGravity, Double ProductBSW,
        Double GrossBarrels, Double NetBarrels) {
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues values = new ContentValues();
    values.put("OrderID", OrderID);
    values.put("CarrierTicketNum", CarrierTicketNum);
    values.put("TankNum", TankNum);
    values.put("TicketTypeID", TicketTypeID);
    values.put("TankTypeID", TankTypeID);
    values.put("ProductObsTemp", ProductObsTemp);
    values.put("ProductObsGravity", ProductObsGravity);
    values.put("ProductBSW", ProductBSW);
    values.put("GrossBarrels", GrossBarrels);
    values.put("NetBarrels", NetBarrels);
    //try {
        db.insertOrThrow("Tickets", null, values);
    /*} catch (SQLiteException sqle) {
        Log.d(TAG, "SQLITException: " + sqle.getMessage());
    }*/
    db.close(); // Closing database connection
}

日志详情如下:

09-08 13:54:57.610: E/AndroidRuntime(5713): FATAL EXCEPTION: main
09-08 13:54:57.610: E/AndroidRuntime(5713): android.database.sqlite.SQLiteConstraintException: error code 19: constraint failed
09-08 13:54:57.610: E/AndroidRuntime(5713):     at android.database.sqlite.SQLiteStatement.native_executeInsert(Native Method)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:113)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1718)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at android.database.sqlite.SQLiteDatabase.insertOrThrow(SQLiteDatabase.java:1617)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at com.dzo.dispatchcrude.driverapp.datalayer.DatabaseHandler.insertTank(DatabaseHandler.java:736)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at com.dzo.dispatchcrude.driverapp.NetBarrelActivity$1.onClick(NetBarrelActivity.java:103)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at android.view.View.performClick(View.java:3511)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at android.view.View$PerformClick.run(View.java:14110)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at android.os.Handler.handleCallback(Handler.java:605)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at android.os.Handler.dispatchMessage(Handler.java:92)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at android.os.Looper.loop(Looper.java:137)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at android.app.ActivityThread.main(ActivityThread.java:4424)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at java.lang.reflect.Method.invokeNative(Native Method)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at java.lang.reflect.Method.invoke(Method.java:511)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
09-08 13:54:57.610: E/AndroidRuntime(5713):     at 
dalvik.system.NativeStart.main(Native Method)

几乎阅读了很多帖子，但没有得到太多帮助。

Answer 1

有两种方法可以解决您的问题。

首先:

将 PRIMARY KEY 声明为 autoincrement

第二个:

尝试插入新行时，为新行提供不同/唯一的 ID。

要测试它，请在再次运行您的应用程序之前DELETE DATABASE。

解决方案: 这一行应该是:

+ "ID integer PRIMARY KEY AUTOINCREMENT," 

代替

+ "ID integer PRIMARY KEY NOT NULL,"