Android Code Snippet Share image using Facebook App

asales

Well-Known Member
Licensed User
Edit (Erel): this code will no longer work. Search for FileProvider.

I'm using this code to post an image in Facebook with the Facebook app of the device.

I don't need create a Facebook App to get "App ID" and "App Secret" to share (until now).

The step 2 ("select the intent...") is because I found differents intents of Facebook app to share an image in several versions of Android (2.3.6, 4.0, 4.4, 5.0):
- com.facebook.katana/com.facebook.composer.shareintent.ImplicitShareIntentHandler
- com.facebook.katana/com.facebook.composer.shareintent.ImplicitShareIntentHandlerDefaultAlias
- com.facebook.katana/.ComposerActivity

I'll be glad to anyone who can test this code (example B4A 4.30 in attached) and any tip to help improve it.

Libraries: Phone (uri) and ContentResolver (packagemanager).

B4X:
Sub PostImageFacebook
    '1. copy the image to File.DirDefaultExternal
    File.Copy(File.DirAssets, "android.jpg", File.DirDefaultExternal, "android.jpg")

    '2. select the image
    Dim u As Uri
    u.Parse("file://" & File.Combine(File.DirDefaultExternal,"android.jpg"))

    Dim pm As PackageManager
    Dim fb1 As String

    '3. select the intent of facebook to share image
    Dim i As Intent
    i.Initialize(i.ACTION_SEND,"")
    i.SetType("image/jpg")

    For Each cn As String In pm.QueryIntentActivities(i)
        If cn.SubString2(0,20) = "com.facebook.katana/" Then
              fb1 = cn
            Exit
        End If
    Next

    i.SetComponent(fb1)
    i.PutExtra("android.intent.extra.STREAM",u)

    '4. start intent
    Try
        StartActivity(i)
    Catch
        ToastMessageShow("Error!",False)
    End Try
End Sub
 

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Last edited by a moderator:

Petrovic

Member
Licensed User
Is this still working after facebook changed permissions?
 
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