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.batchrequestshowto;
//from ww  w  . j  a v a2 s  .c  o m
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

import com.facebook.Request;
import com.facebook.RequestBatch;
import com.facebook.Response;
import com.facebook.Session;
import com.facebook.SessionState;
import com.facebook.UiLifecycleHelper;
import com.facebook.model.GraphObject;
import com.facebook.widget.LoginButton;

public class MainFragment extends Fragment {
  
  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 batchRequestButton;
  private TextView textViewResults;
  
  @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);
    
    batchRequestButton = (Button) view.findViewById(R.id.batchRequestButton);
    batchRequestButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            doBatchRequest();        
        }
    });
        
    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 onSessionStateChange(Session session, SessionState state, Exception exception) {
      if (state.isOpened()) {
          batchRequestButton.setVisibility(View.VISIBLE);
      } else if (state.isClosed()) {
          batchRequestButton.setVisibility(View.INVISIBLE);
      }
  }
  
  private void doBatchRequest() {
      textViewResults = (TextView) this.getView().findViewById(R.id.textViewResults);
      textViewResults.setText("");

      String[] requestIds = {"me", "4"};

      RequestBatch requestBatch = new RequestBatch();
      for (final String requestId : requestIds) {
          requestBatch.add(new Request(Session.getActiveSession(), 
              requestId, null, null, new Request.Callback() {
              public void onCompleted(Response response) {
                  GraphObject graphObject = response.getGraphObject();
                  String s = textViewResults.getText().toString();
                  if (graphObject != null) {
                      if (graphObject.getProperty("id") != null) {
                          s = s + String.format("%s: %s\n", 
                              graphObject.getProperty("id"), 
                              graphObject.getProperty("name"));
                      }
                  }
                  textViewResults.setText(s);
              }
          }));
      }
      requestBatch.executeAsync();
  }
}

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