Android Question Device doesn't ask for runtime permission

marcick · Jun 8, 2019

I have this code for asking runtime permission and it works fine on most of devices.
On a Huawey tablet (Android 9) it works fine in debug and release, but when the app is downloaded from PlayStore the permission request is not executed. In fact, if I go in setting-app-my app-permission I see that all the permissions are unflagged (of course the app then crash).
On other devices like my Samsung (same Android 9) the permission request is always executed, also when the app is downloaded from PlayStore.
Any Idea ?

B4X:

Sub Activity_Create(FirstTime As Boolean)
    If Starter.PermissionOk=False Then
        wait for (CheckPermission1) complete (result As Boolean)
        If result=False Then
            Activity.Finish
            Return
        End If
        wait for (CheckPermission2) complete (result As Boolean)
        If result=False Then
            Activity.Finish
            Return
        End If
        wait for (CheckPermission3) complete (result As Boolean)
        If result=False Then
            Activity.Finish
            Return
        End If
        wait for (CheckPermission4) complete (result As Boolean)
        If result=False Then
            Activity.Finish
            Return
        End If
    End If
    
    Log("All permission ok")
    File.WriteString(Starter.AppPath,"PermOk","")
    Starter.PermissionOk=True
End Sub

Sub CheckPermission1 As ResumableSub
    Starter.rp.CheckAndRequest(Starter.rp.PERMISSION_WRITE_EXTERNAL_STORAGE)
    wait for Activity_PermissionResult(Permission As String,  Result As Boolean)
    Return Result
End Sub
Sub CheckPermission2 As ResumableSub
    Starter.rp.CheckAndRequest(Starter.rp.PERMISSION_ACCESS_FINE_LOCATION)
    wait for Activity_PermissionResult(Permission As String,  Result As Boolean)
    Return Result
End Sub
Sub CheckPermission3 As ResumableSub
    Starter.rp.CheckAndRequest(Starter.rp.PERMISSION_ACCESS_COARSE_LOCATION)
    wait for Activity_PermissionResult(Permission As String,  Result As Boolean)
    Return Result
End Sub
Sub CheckPermission4 As ResumableSub
    Starter.rp.CheckAndRequest(Starter.rp.PERMISSION_READ_PHONE_STATE)
    wait for Activity_PermissionResult(Permission As String,  Result As Boolean)
    Return Result
End Sub

These the relevant code in the manifest

B4X:

......
CreateResourceFromFile(Macro, FirebaseNotifications.FirebaseNotifications)

AddApplicationText(
<meta-data
  android:name="com.google.android.geo.API_KEY"
  android:value="AIzaS.......................hJmc"/>
)   

AddPermission(android.permission.ACCESS_NETWORK_STATE)
AddPermission(android.permission.WRITE_EXTERNAL_STORAGE)
AddPermission(android.permission.READ_PHONE_STATE)
AddPermission(android.permission.PERMISSION_ACCESS_FINE_LOCATION)

AddApplicationText(
  <provider
  android:name="android.support.v4.content.FileProvider"
......

Erel · Jun 9, 2019

Better way to request multiple permissions: https://www.b4x.com/android/forum/threads/handle-multiple-permission-request.94611/#post-598788

There is a conceptual mistake here. You shouldn't save the permission state. Always request them. Better to do it in Activity_Resume.

The approval will happen automatically if it was already granted.

marcick · Jun 11, 2019

Ok, I'm trying to follow your suggestion but I'm not able to work with this code, the app exit without ask for permission

This is my (suppose wrong) code:

B4X:

Sub Process_Globals
    Dim rp As RuntimePermissions
End Sub

Sub Globals

End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("Layout1")   
End Sub

Sub Activity_Resume
    For Each permission As String In Array(rp.PERMISSION_WRITE_EXTERNAL_STORAGE, rp.PERMISSION_ACCESS_FINE_LOCATION, rp.PERMISSION_ACCESS_COARSE_LOCATION, rp.PERMISSION_READ_PHONE_STATE)
        rp.CheckAndRequest(permission)
        Wait For Activity_PermissionResult (permission As String, Result As Boolean)
        If Result = False Then
            ToastMessageShow("E' necessario concedere le autorizzazioni richieste !", True)
            Activity.Finish
            Return
        End If
    Next
    'we have permission!
    Log("All permission ok")
End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub Button1_Click
    ExitApplication
End Sub

And this is my manifest

B4X:

'This code will be applied to the manifest file during compilation.
'You do not need to modify it in most cases.
'See this link for for more information: https://www.b4x.com/forum/showthread.php?p=78136
AddManifestText(
<uses-sdk android:minSdkVersion="19" android:targetSdkVersion="26"/>
<supports-screens android:largeScreens="true"
    android:normalScreens="true"
    android:smallScreens="true"
    android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
'End of default text.
AddManifestText(<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="19" />
)
AddManifestText(<uses-permission
android:name="android.permission.ACCESS_FINE_LOCATION"
android:maxSdkVersion="19" />
)
AddManifestText(<uses-permission
android:name="android.permission.ACCESS_COARSE_LOCATION"
android:maxSdkVersion="19" />
)
AddManifestText(<uses-permission
android:name="android.permission.READ_PHONE_STATE"
android:maxSdkVersion="19" />
)

Erel · Jun 12, 2019

marcick said:
AddManifestText(<uses-permission
android:name="android.permission.READ_PHONE_STATE"
android:maxSdkVersion="19" />
)

Where does it come from?

There is one specific case where you should use maxSdkVersion and it is not relevant here. Delete all of this. Let the compiler add the permissions for you.

marcick · Jun 12, 2019

Erel said:
Where does it come from?

.. I don't know

Anyway, also deleting thet part in the manifest, the code does not work. The app exits without asking the permissions

Erel · Jun 12, 2019

Click on Logs - List Permissions. Do you see the relevant permissions?
If you are running the code that you posted above then they will not be listed (because they are not required).

You can add the permissions with AddPermission.

marcick · Jun 12, 2019

ok, but looks like the above code does not work correctly

I addes this to the manifest:

B4X:

AddPermission(android.permission.WRITE_EXTERNAL_STORAGE)
AddPermission(android.permission.ACCESS_FINE_LOCATION)
AddPermission(android.permission.READ_PHONE_STATE)

As the app is started first time, it asks for the first two permission, then exits with the ToastMessageShow
I starts it again then it asks for the third permission.

Also, if I then uncheck the three permissions in Settings-App, the app does not ask them again

Erel · Jun 12, 2019

marcick said:
Also, if I then uncheck the three permissions in Settings-App, the app does not ask them again

This is the expected behavior. The user doesn't want to grant the permission.

Don't use toast messages. Add Log messages to better understand what happens.

It sounds to me that everything is working correctly. If you think otherwise then please upload the project and explain the steps to reproduce it.

marcick · Jun 12, 2019

If the user doesn't want to grant the permission, I expect the app inform the user that if it doesn't accept the app can't work.
I attach here the zip. On my device the app asks the first two (of three) permission, then exits.

Erel · Jun 12, 2019

I see the problem.

First it is better to check it with this code:

B4X:

Sub Button1_Click
   For Each permission As String In Array(rp.PERMISSION_WRITE_EXTERNAL_STORAGE, rp.PERMISSION_ACCESS_FINE_LOCATION, rp.PERMISSION_READ_PHONE_STATE)
       rp.CheckAndRequest(permission)
       Wait For Activity_PermissionResult (permission As String, Result As Boolean)
       Log(permission & ": " & Result)
   Next
End Sub

You shouldn't call this code from Activity_Resume. It causes the requests to be made multiple times as the activity is paused and resumed when the permission dialog appears.

Your best option is to always request the permissions just before you need them.

marcick · Jun 12, 2019

Ok. I was following this and this
I'll try as you suggest, thanks

Erel · Jun 12, 2019

I've updated the instructions.
https://www.b4x.com/android/forum/threads/handle-multiple-permission-request.94611/#post-598788

marcick · Jun 12, 2019

I put it in activity create, just after the layout and seems to work, thougth I have to deal now with the starter service that do something that need permission ....
Anyway the behaviour lokks like this:

If the user doesn't grant the permissions, everytime the app is started it asks permissions again.
If the user grants them, then also if he "ungrant" in Settings-app-permission the app does not ask again, it says "permission ok". Better like this.

Android Question Device doesn't ask for runtime permission

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