Facebook dialog won't open

According to this link here , I installed SDK 3.2.1 and implemented uiHelper as well as FacebookDialog as follows:

if (FacebookDialog.canPresentShareDialog(getApplicationContext(),
            FacebookDialog.ShareDialogFeature.SHARE_DIALOG)) {
        // Publish the post using the Share Dialog
        Toast.makeText(this, "if", Toast.LENGTH_LONG).show();
        FacebookDialog shareDialog = new FacebookDialog.ShareDialogBuilder(
                this).setLink("https://developers.facebook.com/android")
                .build();
        uiHelper.trackPendingDialogCall(shareDialog.present());

    } else {
        Toast.makeText(this, "else", Toast.LENGTH_LONG).show();
        // Fallback. For example, publish the post using the Feed Dialog
        publishFeedDialog();
    }

      

        
        
        
      

    

For publishFeedDialog()

I have:

    private void publishFeedDialog() {
    Bundle params = new Bundle();
    params.putString("name", "Facebook SDK for Android");
    params.putString("caption",
            "Build great social apps and get more installs.");
    params.putString(
            "description",
            "The Facebook SDK for Android makes it easier and faster to develop Facebook integrated Android apps.");
    params.putString("link", "https://developers.facebook.com/android");
    params.putString("picture",
            "https://raw.github.com/fbsamples/ios-3.x-howtos/master/Images/iossdk_logo.png");

    WebDialog feedDialog = (new WebDialog.FeedDialogBuilder(this,
            Session.getActiveSession(), params)).setOnCompleteListener(
            new OnCompleteListener() {

                @Override
                public void onComplete(Bundle values,
                        FacebookException error) {
                    if (error == null) {
                        // When the story is posted, echo the success
                        // and the post Id.
                        final String postId = values.getString("post_id");
                        if (postId != null) {
                            Toast.makeText(getApplicationContext(),
                                    "Posted story, id: " + postId,
                                    Toast.LENGTH_SHORT).show();
                        } else {
                            // User clicked the Cancel button
                            Toast.makeText(getApplicationContext(),
                                    "Publish cancelled", Toast.LENGTH_SHORT)
                                    .show();
                        }
                    } else if (error instanceof FacebookOperationCanceledException) {
                        // User clicked the "x" button
                        Toast.makeText(getApplicationContext(),
                                "Publish cancelled", Toast.LENGTH_SHORT)
                                .show();
                    } else {
                        // Generic, ex: network error
                        Toast.makeText(getApplicationContext(),
                                "Error posting story", Toast.LENGTH_SHORT)
                                .show();
                    }
                }

            }).build();
    feedDialog.show();
}

      

        
        
        
      

    

Now FacebookDialog.canPresentShareDialog

it will always be false even if the Fb app is installed in the phone and then the publishFeedDialog () function is called. But the application crashes after that.

What's the solution for this? Why is the normal facebook dialog shown when the app is on my phone? (I'm using Lenevo's model if that helps)