Android Question Write to File

[FlyingEagle]

I tried a lot but nothing works for me ... Google Pixel 3 XL Android 11 No-Root-Access

I want to write to files, I tried every single option from File.Dir_xxxx

I want to write to my own Directory on /data/emulated/0/xxxx.

I tried here

Sub Activity_PermissionResult (Permission As String, Result As Boolean)
  
    If Permission = Starter.rp.PERMISSION_ACCESS_COARSE_LOCATION Then
        Result = True
    Else
        Log ( "PERMISSION_ACCESS_COARSE_LOCATION" )
    End If
  
    If Permission = Starter.rp.PERMISSION_ACCESS_FINE_LOCATION Then
        Result = True
    Else
        Log ( "PERMISSION_ACCESS_FINE_LOCATION" )
    End If
  
    If Permission = Starter.rp.PERMISSION_READ_EXTERNAL_STORAGE Then
        Result = True
    Else
        Log ( "PERMISSION_READ_EXTERNAL_STORAGE" )
    End If
  
    If Permission = Starter.rp.PERMISSION_WRITE_EXTERNAL_STORAGE Then
        Result = True
    Else
        Log ( "PERMISSION_WRITE_EXTERNAL_STORAGE" )
    End If
  
    B4XPages.Delegate.Activity_PermissionResult(Permission, Result)
  
End Sub

Or here

Sub Activity_Create(FirstTime As Boolean)
    Dim pm As B4XPagesManager
    pm.Initialize(Activity)
  
'    Starter.rp.CheckAndRequest(Starter.rp.PERMISSION_ACCESS_COARSE_LOCATION)
'    Starter.rp.CheckAndRequest(Starter.rp.PERMISSION_ACCESS_FINE_LOCATION)
'    Starter.rp.CheckAndRequest(Starter.rp.PERMISSION_READ_EXTERNAL_STORAGE)
'    Starter.rp.CheckAndRequest(Starter.rp.PERMISSION_WRITE_EXTERNAL_STORAGE)

    For Each permission As String In Array( Starter.rp.PERMISSION_ACCESS_COARSE_LOCATION, _
                                            Starter.rp.PERMISSION_ACCESS_FINE_LOCATION, _
                                            Starter.rp.PERMISSION_READ_EXTERNAL_STORAGE, _
                                            Starter.rp.PERMISSION_WRITE_EXTERNAL_STORAGE )
                                          
        Starter.rp.CheckAndRequest(permission)
      
        Wait For Activity_PermissionResult (permission As String, Result As Boolean)
      
        If Result = False Then
            Log ("No permission!" ) ', True)
            Activity.Finish
            Return
        End If
    Next

End Sub

Or here

AddManifestText            (
                            <uses-sdk android:minSdkVersion="5" android:targetSdkVersion="29"/>
                            <supports-screens    android:largeScreens="true"
                                                android:normalScreens="true"
                                                android:smallScreens="true"
                                                android:anyDensity="true"/>
                            <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
                            <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
                            <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
                            <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
                        )

It took me the whole evening ... who can help?


PS: Where do this lines have to be, in front of or at last of the code of a sub?

B4XPages.Delegate

 

[mevial]

All of this is not needed if you are using the correct SDK: https://www.b4x.com/b4a.html

The only special thing with targetSdkVersion = 29, related to File.DirRootExternal is:

SetApplicationAttribute (android: requestLegacyExternalStorage, true)

B4A Версия: 10.2
Java Версия: 8
Анализ кода.    (0.17s)
Building folders structure.    (0.02s)
Компиляция кода.    (0.20s)
Компиляция кода макетов.    (0.00s)
Организация библиотек.    (0.00s)
    (AndroidX SDK)
Генерирование файла R.    (0.00s)
Компиляция сгенерированного кода Java.    (0.02s)
Преобразование байтового кода - оптимизированный dex.    (4.27s)
Упаковочные файлы.    Error
AndroidManifest.xml:26: error: Error parsing XML: not well-formed (invalid token)

AAPT path: D:\dev\AndriodSDK\tools\..\build-tools\27.0.1\aapt.exe
Exit code:1