Android Question EACCES (permission denied)

[dagodom]

Hello
I have a problem with writing permission (WRITE_EXTERNAL_STORAGE)
The solution I found in other discussions does not work

In manifest I put the following instructions:

AddManifestText(
<uses-sdk android:minSdkVersion="16" android:targetSdkVersion="23"/>
<uses-permission
  android:name="android.permission.WRITE_EXTERNAL_STORAGE"
  android:maxSdkVersion="18" />
<supports-screens android:largeScreens="true"
    android:normalScreens="true"
    android:smallScreens="true"
    android:anyDensity="true"/>)

I modified the copy routine in this way:

Sub CopyDBFromAssets (FileName As String) As String
    Dim TargetDir As String
    'If File.ExternalWritable Then TargetDir = File.DirDefaultExternal Else TargetDir = File.DirInternal
    If File.ExternalWritable Then TargetDir =rp.GetSafeDirDefaultExternal("") Else TargetDir = File.DirInternal

    If File.Exists(TargetDir, FileName) = False Then
        File.delete(TargetDir, FileName)
        File.Copy(File.DirAssets, FileName, TargetDir, FileName)
    End If
    Return TargetDir
End Sub

On a HUAWEi with Android 7.0 it works, on an Asus with Android 5.0 i get the error
EACCESS (Permission denied)

If i invert the instructions

    If File.ExternalWritable Then TargetDir = File.DirDefaultExternal Else TargetDir = File.DirInternal
    'If File.ExternalWritable Then TargetDir =rp.GetSafeDirDefaultExternal("") Else TargetDir = File.DirInternal

I get the opposite result, it works on Android 5.0 but not in Android 7.0

What am I doing wrong ?
Thank you

 

[Peter Simpson]

Watch this video and read the first post very carefully https://www.b4x.com/android/forum/threads/runtime-permissions-android-6-0-permissions.67689/#content

 

[dagodom]

my english was not very good but I understood and now everything works.
Thank you