Android Question When I run Program Then It show the Error.

[Vivek Bhatt]

When I run Program then it show me error.
i will try to solve this error and find the tutorials or any guide but its not find.
Logger connected to: emulator-5554
*** Service (starter) Create ***
Error occurred on line: 25 (Starter)
java.io.FileNotFoundException: /mnt/sdcard/Android/data/b4a.example/files/virtual_assets/data.db (No such file or directory)
at org.apache.harmony.luni.platform.OSFileSystem.open(Native Method)
at dalvik.system.BlockGuard$WrappedFileSystem.open(BlockGuard.java:232)
at java.io.FileInputStream.<init>(FileInputStream.java:80)
at anywheresoftware.b4a.objects.streams.File.OpenInput(File.java:199)
at anywheresoftware.b4a.objects.streams.File.Copy(File.java:335)
at b4a.example.starter._service_create(starter.java:178)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:710)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:339)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:249)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:139)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:166)
at b4a.example.starter.onCreate(starter.java:55)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:1920)
at android.app.ActivityThread.access$2500(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:982)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:3647)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
** Service (starter) Start **

 

[JakeBullet70]

It cannot find the file: data.db
Is there a data.db in your files folder? If so it needs to be copied to a working folder before you open it.

 

[DonManfred]

1. Post log in quote tags!
2. Hiding the code you are using does NOT HELP. Upload a small sample project which shoes the problem.
3. Use a real device instead of the Emulator. Does the emulator have an SDCard? Based on the error it can not find the file data.db inside the files folder

 

[Vivek Bhatt]

yes i wil create data.db using sql dababase Manager.

 

[Vivek Bhatt]

1. Post log in quote tags!
2. Hiding the code you are using does NOT HELP. Upload a small sample project which shoes the problem.
3. Use a real device instead of the Emulator. Does the emulator have an SDCard? Based on the error it can not find the file data.db inside the files folder

Yes Sir Emulator have an SD Card.

 

[Erel]

Please upload the project (File - Export as zip).

 

[Vivek Bhatt]

Please upload the project (File - Export as zip).

Thank You Sir.

 

[Erel]

Public dbpath= "D:\B4A\Files\data.db" As String

This is an invalid path. You cannot access the PC file system.

You can add the database to the Files folder and then use DBUtils.CopyDBFromAssets to copy the file to a writable folder.

 

[eps]

see also this thread by the same User... https://www.b4x.com/android/forum/threads/database-unable-to-open.83730/#post-530638