Android Question android.permission.WRITE_SETTINGS problem

[dragonguy]

My app(target sdk = 25) had using android.permission.WRITE_SETTINGS permission. First time launch the app, it will prompt up ask user to enable the permission but after restart the device, it will ask again. Is it normal?

Every time reboot the device, is it need to enable permission again?

Sub CanWrite As Boolean
    Dim p As Phone
    If p.SdkVersion < 23 Then Return True
    Dim ctxt As JavaObject
    ctxt.InitializeContext
    Dim jo As JavaObject
    Return jo.InitializeStatic("android.provider.Settings.System").RunMethod("canWrite", Array(ctxt))
End Sub

 

[eps]

What's in your manifest and what are you trying to achieve?

 

[DonManfred]

My app(target sdk = 25)

You MUST use Runtimepermissions library starting from Android 23.
See https://www.b4x.com/android/forum/threads/runtime-permissions-android-6-0-permissions.67689/

If you dont want to use runtimepermission-system then you can set the targetsdk to maximum 22.

 

[dragonguy]

Yes, i had used runtimepermissions lib, but android.permission.WRITE_SETTINGS need special way to grant the permission.

WRITE_SETTINGS
added in API level 1
String WRITE_SETTINGS
Allows an application to read or write the system settings.
Note: If the app targets API level 23 or higher, the app user must explicitly grant this permission to the app through a permission management screen. The app requests the user's approval by sending an intent with action ACTION_MANAGE_WRITE_SETTINGS. The app can check whether it has this authorization by calling Settings.System.canWrite().
Protection level: signature
Constant Value: "android.permission.WRITE_SETTINGS"

from https://developer.android.com/reference/android/Manifest.permission.html#WRITE_SETTINGS
not only reboot device, when re-install the app, also need to re-grant the permission.

 

[DonManfred]

I don´t see the permissionrequest in your code.
How do you request the permission?

 

[dragonguy]

i need to investigate my app first, something wrong in my app and make this happen.
thanks guys for reply.