Android Question Another Filewrite Permission question

Hobby4Life · Nov 6, 2019

First of all,

I have read the following topics about Persmissions:

https://www.b4x.com/android/forum/threads/android-jar-targetsdkversion-minsdkversion.87610/

and

https://www.b4x.com/android/forum/threads/runtime-permissions-android-6-0-permissions.67689/

But none of them make sense to me how to visualize this into my project.
Adding permission lines to the manifest did not work.

like:

B4X:

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

All I want to do is save the following to cfg.txt

B4X:

Sub SaveINI
    Dim List1 As List

    List1.Initialize
   
    List1.Add(Timeslot_Spinner1.SelectedIndex)
    List1.Add(Timeslot_Spinner2.SelectedIndex)
    List1.Add(Timeslot_Spinner3.SelectedIndex)
    List1.Add(Timeslot_Spinner4.SelectedIndex)
    List1.Add(Timeslot_Spinner5.SelectedIndex)
    List1.Add(Timeslot_Spinner6.SelectedIndex)
    List1.Add(Timeslot_Spinner7.SelectedIndex)
    List1.Add(Timeslot_Spinner8.SelectedIndex)
    List1.Add(Timeslot_Spinner9.SelectedIndex)
    List1.Add(Timeslot_Spinner10.SelectedIndex)
    File.WriteList(File.DirRootExternal,FileINI,List1)
End Sub

and get this error.

B4X:

java.io.FileNotFoundException: /storage/emulated/0/cfg.txt (Permission denied)

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="5" 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, "$LABEL$")
CreateResourceFromFile(Macro, Themes.DarkTheme)
'End of default text.
AddManifestText(
<uses-permission
  android:name="android.permission.WRITE_EXTERNAL_STORAGE"
  android:maxSdkVersion="19" />
)

DonManfred · Nov 6, 2019

As written in the tutorial you need to request the permission when you need it.
go again over

Hobby4Life said:
https://www.b4x.com/android/forum/threads/runtime-permissions-android-6-0-permissions.67689/

Hobby4Life · Nov 6, 2019

DonManfred said:
As written in the tutorial you need to request the permission when you need it.
go again over

I have been struggling for more than a week with this.. and read it lots of times..

But there is an example with googlemaps.
But I dont see (Visual) how this relates with saving a file.

For some people it is enough to visualize things from text, but unfortunally not for me.

A pinpoint in the good direction would be much apreciated.

DonManfred · Nov 6, 2019

Hobby4Life said:
A pinpoint in the good direction would be much apreciated

i already gave you the correct pinpoint!

Watch the Runtimepermissions tutorial. It is shown in the video.
You need to request the permission, wait for the result and can use this path if the Permission is given.

The forumsearch is working too
https://www.b4x.com/android/forum/pages/results/?query=dirrootexternal+runtimepermission

Hobby4Life · Nov 6, 2019

Thanks, I will Give it another shot again.

AnandGupta · Nov 6, 2019

Hi @Hobby4Life,

I think you are missing, below code,
rp.CheckAndRequest(rp.PERMISSION_ACCESS_FINE_LOCATION)

Regards,

Anand

DonManfred · Nov 6, 2019

this and also the permission result

AnandGupta · Nov 6, 2019

Oh yes,

@Hobby4Life , pl check below codes in your project,

B4X:

[INDENT]Sub MapFragment1_Ready
   gmap = MapFragment1.GetMap
   rp.CheckAndRequest(rp.PERMISSION_ACCESS_FINE_LOCATION)
End Sub

Sub Activity_PermissionResult (Permission As String, Result As Boolean)
   If Permission = rp.PERMISSION_ACCESS_FINE_LOCATION Then
     gmap.MyLocationEnabled = Result
   End If
End Sub

[/INDENT]

Regards,

Anand

Hobby4Life · Nov 6, 2019

I think I got it working

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="5" 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, "$LABEL$")
CreateResourceFromFile(Macro, Themes.DarkTheme)
'End of default text.
AddManifestText(<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="18" />
)

B4X:

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.
    Private pw As PhoneWakeState
    Private timClock As Timer
    Private RP As RuntimePermissions
    Private FileINI As String : FileINI = "cfg.txt"
End Sub

B4X:

Sub SaveINI
    Dim List1 As List

    List1.Initialize
  
    List1.Add(Timeslot_Spinner1.SelectedIndex)
    List1.Add(Timeslot_Spinner2.SelectedIndex)
    List1.Add(Timeslot_Spinner3.SelectedIndex)
    List1.Add(Timeslot_Spinner4.SelectedIndex)
    List1.Add(Timeslot_Spinner5.SelectedIndex)
    List1.Add(Timeslot_Spinner6.SelectedIndex)
    List1.Add(Timeslot_Spinner7.SelectedIndex)
    List1.Add(Timeslot_Spinner8.SelectedIndex)
    List1.Add(Timeslot_Spinner9.SelectedIndex)
    List1.Add(Timeslot_Spinner10.SelectedIndex)
  
    RP.CheckAndRequest(RP.PERMISSION_WRITE_EXTERNAL_STORAGE)
    wait for Activity_PermissionResult( Permission As String, Result As Boolean)
    If Result Then
        File.WriteList(File.DirRootExternal,FileINI,List1)
    Else
  
    End If

End Sub

AnandGupta · Nov 6, 2019

Hi @Hobby4Life,

Good that you got the solution. You can mark this thread as '[SOLVED]'.

Regards,

Anand

Erel · Nov 7, 2019

You should remove this snippet:

B4X:

AddManifestText(<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="18" />
)

It is only needed when you only access RuntimePermissions.GetSafeDirDefaultExternal.

Android Question Another Filewrite Permission question

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