当代码未关闭数据库时，如何解决错误“试图重新打开已关闭的对象”？

Question

我正在开发将数据保存到SQLite的Android应用，并且我在其他应用上一直使用此方法，但是这引发了此异常：

但是添加新行的方法直到完成所有操作后才会关闭数据库。

我已经搜索了这个问题，大多数答案是“在此之后进行操作时您关闭了数据库”，情况并非如此。

此方法适用于我的其他Android应用程序，但在此方法中不起作用。

添加行，打开数据库，然后关闭数据库代码：

/**
     * Adds a camera device.
     *
     * @param device    The Device Class whcih will be saved in the database.
     */
    public final void createEntry(final Device device) throws Exception {
        open();

        final ContentValues values = new ContentValues();
        values.put(devicesColumns[1], AESCryptor.encrypt(device.getDeviceName()));
        values.put(devicesColumns[2], AESCryptor.encrypt(device.getDeviceUrl()));
        values.put(devicesColumns[12], AESCryptor.encrypt(device.getDdnsURL()));
        values.put(devicesColumns[3], AESCryptor.encrypt(device.getUser().getUsername()));
        values.put(devicesColumns[4], AESCryptor.encrypt(device.getUser().getPassword()));
        values.put(devicesColumns[5], AESCryptor.encrypt(new Gson().toJson(device.getCamera())));
        values.put(devicesColumns[6], AESCryptor.encrypt(new Gson().toJson(device.getWlan())));
        values.put(devicesColumns[7], AESCryptor.encrypt(device.getLocalPort()));
        values.put(devicesColumns[8], AESCryptor.encrypt(device.getDDNSPort()));
        values.put(devicesColumns[9], AESCryptor.encrypt(device.getMotioneyeVersion()));
        values.put(devicesColumns[10], AESCryptor.encrypt(device.getMotionVersion()));
        values.put(devicesColumns[11], AESCryptor.encrypt(device.getOsVersion()));


        String insertId = "ID = " + database.insert("DEVICES", null, values);
        if (device.getID() != null) {
            delete_item(device.getID());
            insertId = device.getID();
        }


        final Cursor cursor = database.query("DEVICES", devicesColumns, insertId, null,
                null, null, null);
        cursor.close();
        close();

    }

    public final void open() throws SQLException {
        database = dbHelper.getWritableDatabase();
    }


    public final void close() {
        dbHelper.close();
    }

日志：

java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase: /data/user/0/com.developerfromjokela.motioneyeclient/databases/Devices.db
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at android.database.sqlite.SQLiteClosable.acquireReference(SQLiteClosable.java:55)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1234)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1110)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1278)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at com.developerfromjokela.motioneyeclient.database.Source.createEntry(Source.java:108)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at com.developerfromjokela.motioneyeclient.ui.setup.activities.SetupStartScreen.fillItems(SetupStartScreen.java:359)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at com.developerfromjokela.motioneyeclient.ui.setup.activities.SetupStartScreen.access$500(SetupStartScreen.java:89)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at com.developerfromjokela.motioneyeclient.ui.setup.activities.SetupStartScreen$3$1.run(SetupStartScreen.java:217)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at android.os.Handler.handleCallback(Handler.java:790)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:99)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at android.os.Looper.loop(Looper.java:164)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:6494)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
2019-04-23 13:55:32.460 9621-9621/com.developerfromjokela.motioneyeclient W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)