Android Open Source - android-3.0-howtos Main Fragment

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License

The source code is released under:
Copyright 2012-present Facebook, Inc. You are hereby granted a non-exclusive, worldwide, royalty-free license to use, copy, modify, and distribute this software in source code or binary form for use ...
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Java Source Code

package com.facebook.samples.feeddialoghowto;
//from  w  w w  .  j a va2s.  com
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;

import com.facebook.FacebookException;
import com.facebook.FacebookOperationCanceledException;
import com.facebook.Session;
import com.facebook.SessionState;
import com.facebook.UiLifecycleHelper;
import com.facebook.widget.LoginButton;
import com.facebook.widget.WebDialog;
import com.facebook.widget.WebDialog.OnCompleteListener;

public class MainFragment extends Fragment {
  
  private static final String TAG = "MainFragment";
  
  private UiLifecycleHelper uiHelper;
    private Session.StatusCallback callback = new Session.StatusCallback() {
        @Override
        public void call(final Session session, final SessionState state, final Exception exception) {
            onSessionStateChange(session, state, exception);
        }
    };
    
  private Button publishButton;
  
  @Override
  public View onCreateView(LayoutInflater inflater, 
          ViewGroup container, 
          Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.main, container, false);
      
    LoginButton authButton = (LoginButton) view.findViewById(R.id.authButton);
    authButton.setFragment(this);
    
      publishButton = (Button) view.findViewById(R.id.publishButton);
      publishButton.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        publishFeedDialog();    
      }
    });

      return view;
  }
  
  @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        uiHelper = new UiLifecycleHelper(getActivity(), callback);
        uiHelper.onCreate(savedInstanceState);
    }

    @Override
    public void onResume() {
        super.onResume();
        
        // For scenarios where the main activity is launched and user
    // session is not null, the session state change notification
    // may not be triggered. Trigger it if it's open/closed.
    Session session = Session.getActiveSession();
    if (session != null &&
        (session.isOpened() || session.isClosed()) ) {
      onSessionStateChange(session, session.getState(), null);
    }
    
        uiHelper.onResume();
    }
    
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        uiHelper.onActivityResult(requestCode, resultCode, data);
    }
    
    @Override
    public void onPause() {
        super.onPause();
        uiHelper.onPause();
    }
    
    @Override
    public void onDestroy() {
        super.onDestroy();
        uiHelper.onDestroy();
    }
    
    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        uiHelper.onSaveInstanceState(outState);
    }
    
  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");
        
        // Invoke the dialog
      WebDialog feedDialog = (
          new WebDialog.FeedDialogBuilder(getActivity(),
              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(getActivity(),
                            "Posted story, id: "+postId,
                            Toast.LENGTH_SHORT).show();
                      } else {
                        // User clicked the Cancel button
                        Toast.makeText(getActivity().getApplicationContext(), 
                                            "Publish cancelled", 
                                            Toast.LENGTH_SHORT).show();
                      }
                  } else if (error instanceof FacebookOperationCanceledException) {
                    // User clicked the "x" button
                    Toast.makeText(getActivity().getApplicationContext(), 
                                        "Publish cancelled", 
                                        Toast.LENGTH_SHORT).show();
                  } else {
                    // Generic, ex: network error
                    Toast.makeText(getActivity().getApplicationContext(), 
                                        "Error posting story", 
                                        Toast.LENGTH_SHORT).show();
                  }
                }
                
                })
              .build();
      feedDialog.show();
    }
  
  private void onSessionStateChange(Session session, SessionState state, Exception exception) {
      if (state.isOpened()) {
        Log.i(TAG, "Logged in...");
          publishButton.setVisibility(View.VISIBLE);
      } else if (state.isClosed()) {
        Log.i(TAG, "Logged out...");
          publishButton.setVisibility(View.INVISIBLE);
      }
  }

}
Java Source Code List
