Java Question [Solved] Stuck with onActivityResult

[vpires]

Hello group.

I'm fighting with the facebook sdk and have hit a (for me) brick wall. The
protected void onActivityResult(int requestCode, int resultCode, Intent data) activity method needs to be overrrided in our activity, so i've put this code :

@ShortName("fbGlue")
    @ActivityObject
    public static class fbGlue{
        private IOnActivityResult ion;
        int requestCode;

  
        public void Initialize(BA ba) {
            ion = new IOnActivityResult() {

                @SuppressWarnings("unchecked")
                @Override
                public void ResultArrived(int resultCode, Intent intent) {
                    Log.d("B4A","Result Arrived");
                }
        };
      
        BA pBa =  ba.processBA;
        if (pBa == null) {
            pBa = ba;
            Log.d("B4A","pba was null");
        } else {
            Log.d("B4A","pba was not null");
        }
          
        try {
            pBa.startActivityForResult(ion, null); //<-- passing null instead of an intent
            Log.d("B4A","first pass");
            }
        catch (NullPointerException npe) {
          //required...
          Log.d("B4A","NPE");
        }
        BA.SharedProcessBA sba = pBa.sharedProcessBA;
        try {
            Field f = BA.SharedProcessBA.class.getDeclaredField("onActivityResultCode");
            f.setAccessible(true);
            requestCode = f.getInt(sba) - 1;
            Log.d("B4A","" + requestCode);
            //requestCode holds the value that should be used to send the intent.
          
        } catch (Exception e) {
        throw new RuntimeException(e);
        }
      
        }  
    }

that compiles & runs (I get the facebook login page), but doesn't give the expected results. In the log i see

onActivityResult: wi is null

I know that i should use requestCode somewhere, but can't find any place in the facebookSdk to use it. So, does anyone know a workaround for this situation ?

TIA
Nelson

 

[Erel]

You should use the code from the first post: http://www.b4x.com/android/forum/threads/java-guide-using-onactivityresult.7297/

The code in the second post is only required when the other library sends the intent.

 

[vpires]

well, that's my problem, it's the code in the facebook sdk that starts the intent.

 

[Erel]

Where are facebook sdk instructions?

 

[vpires]

i'm using a wrapper to easy it's use from here : https://github.com/sromku/android-simple-facebook

i've
1. compiled the facebook sdk and exported as it as jar
2. compiled the android-simple-facebook
3. can use the android-simple-facebook normally in a java app, so i know it's working
4. my wrapper to the android-simple-facebook seems to be working, since it does all the initialization stuff and the b4a

Sub Activity_Resume
  f.onResume
  f.Login()
End Sub

shows the facebook login page and i can sign in. The listeners for the login are working.


TIA

 

[Erel]

I don't think that it will work in this case.

 

[vpires]

for the future in case someone needs it...

ion = new IOnActivityResult() {
                @SuppressWarnings("unchecked")
                @Override
                public void ResultArrived(int resultCode, Intent intent) {
                    mSimpleFacebook.onActivityResult(myba.activity, 0xface, resultCode, intent);
                }
        };
        try {
            ba.startActivityForResult(ion, null); //<-- passing null instead of an intent
            }
        catch (NullPointerException npe) {
          //required...
        }
        BA pBa =  ba.processBA;
        BA.SharedProcessBA sba = pBa.sharedProcessBA;
        sba.onActivityResultMap.put(0xface, new WeakReference(ion));

the rest of the wrapper is easy

Tks,
Nelson

 

[vpires]

Sucess. I can do facebook from B4A.

Sub Process_Globals
       
End Sub

Sub Globals
   
    Dim f As fb
   
End Sub

Sub Activity_Create(FirstTime As Boolean)
       
    f.Initialize("fb","531882130230394")
   
    Dim b,b1 As Button
    b.Initialize("bnt")
    b.Text = "Login to FB & Post Photo"
    Activity.AddView(b,0,0,100%x,60dip)
    b1.Initialize("bnt1")
    b1.Text = "Logout from FB"
    Activity.AddView(b1,0,100%y-60dip,100%x,60dip)
   
End Sub
Sub Activity_Resume
    f.onResume
End Sub

Sub Activity_Pause (UserClosed As Boolean)
End Sub
Sub bnt_Click
    f.Login
End Sub
Sub bnt1_Click
    f.Logout
End Sub
Sub fb_LoginOnLogin
    Dim bmp As FbPhoto
       
    bmp.Initialize
    bmp.Name="B4A App testing"
    bmp.Image = LoadBitmap(File.DirAssets,"users.png")
    f.PublishPhoto(bmp.build,Null)
   
End Sub
Sub fb_PublishPhotoOnComplete(Id As String)
    Log("Photo published with ID=" & Id)
End Sub
Sub fb_PublishPhotoOnException(Exception As String)
    Log(Exception)
End Sub
Sub fb_PublishPhotoOnFail(Reason As String)
    Log(Reason)
End Sub
Sub fb_PublishPhotoOnThinking
    Log("Publish Photo Thinking")
End Sub

gives me this on my fb page.

Now, off to work and fix some computers.

 

[alwaysbusy]

I guess this trick (of @vpires ) does not work anymore as sba.onActivityResultMap is not visible anymore. I have to start an activityforresult, using a fixed request code (0xce8b in my case). Any workarounds?

 

[Erel]

It was never public. I guess that vpires used the same package name as the BA class. You can access it with this code:

BA.SharedProcessBA sba = ba.processBA.sharedProcessBA;
     Field f = sba.getClass().getDeclaredField("onActivityResultMap");
     f.setAccessible(true);
     if (f.get(sba) == null)
       f.set(sba, new HashMap<Integer, WeakReference<IOnActivityResult>>());
     onActivityResultMap = (HashMap<Integer, WeakReference<IOnActivityResult>>) f.get(sba);

 

[alwaysbusy]

That did the trick! I was getting close, just didn't create the new HashMap stuff so I got a null pointer exception