Android Question KeyValueStore library error

[hanyelmehy]

i use : https://www.b4x.com/android/forum/threads/b4x-kvs2-keyvaluestore2-library.120234/

    Public kvs As KeyValueStore
    kvs.Initialize(File.DirInternal, "savedw.dat")

when try to put or delete data i get this error

Error occurred on line: 162 (KeyValueStore)
android.database.sqlite.SQLiteReadOnlyDatabaseException: attempt to write a readonly database (code 1032 SQLITE_READONLY_DBMOVED)
    at android.database.sqlite.SQLiteConnection.nativeExecuteForChangedRowCount(Native Method)
    at android.database.sqlite.SQLiteConnection.executeForChangedRowCount(SQLiteConnection.java:831)
    at android.database.sqlite.SQLiteSession.executeForChangedRowCount(SQLiteSession.java:756)
    at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:66)
    at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1806)
    at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1733)
    at anywheresoftware.b4a.sql.SQL.ExecNonQuery(SQL.java:74)
    at students.edraak.onlineexam.keyvaluestore._deleteall(keyvaluestore.java:97)
    at students.edraak.onlineexam.addstudent._deletealldata(addstudent.java:748)
    at students.edraak.onlineexam.addstudent._activity_create(addstudent.java:642)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at students.edraak.onlineexam.addstudent.afterFirstLayout(addstudent.java:105)
    at students.edraak.onlineexam.addstudent.access$000(addstudent.java:17)
    at students.edraak.onlineexam.addstudent$WaitForLayout.run(addstudent.java:83)
    at android.os.Handler.handleCallback(Handler.java:883)
    at android.os.Handler.dispatchMessage(Handler.java:100)
    at android.os.Looper.loop(Looper.java:214)
    at android.app.ActivityThread.main(ActivityThread.java:7410)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)

 

[Johan Schoeman]

You cannot use DirInternal as it is read only.

 

[mangojack]

You cannot use DirInternal as it is read only.

DirAssets maybe ? ... I am sure DirInternal is fine.

[B4X] KVS - KeyValueStore library

A key / value persistent store. The data is serialized using B4XSerializator and is stored in an internal database. The database can be shared between B4A, B4i and B4J. Using KVS is similar to using a Map. You initialize it once and then you can put or get items with Put, Get or GetDefault...

www.b4x.com

 

[mangojack]

I get no inForum results searching for that error ... but quite a few with an external / google search.

Somehow connected to Database or journal being removed / deleted / refreshed... Maybe a small sleep(200) before writing ??

Hopefully someone with more expertise in this area can help.

 

[Erel]

File.DirInternal is fine. It is not read-only.

Try to reproduce it in a small project and upload it.