Android Facebook Integration

Download: http://www.filefactory.com/file/cbd661e/n/Facebook-Example.zip

Steps involved:
1. Apply for a Facebook Application ID (APP_ID)
2. Include the Facebook APP_ID in your Android Application

Facebook mFacebook = new Facebook(getResources().getString(R.string.FACEBOOK_ID_TEST));

3. Make a call to Facebook for single-sign on authorization
4. In your onActivityResult() function

 
@Override
	public void onActivityResult(int requestCode, int resultCode, Intent data)
		{
			super.onActivityResult(requestCode, resultCode, data);
			mFacebook.authorizeCallback(requestCode, resultCode, data);
		}

File: facebook_login.xml

 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:background="@color/white"
android:gravity="center_horizontal">

<com.facebook.android.LoginButton
	android:id="@+id/login" android:src="@drawable/login_button"
	android:layout_width="wrap_content" android:layout_height="wrap_content"
	android:layout_margin="30dp" />

<TextView android:id="@+id/txt" android:text="@string/hello"
	android:textColor="@color/black" android:layout_width="wrap_content"
	android:layout_height="wrap_content" />

<Button android:id="@+id/uploadButton" android:text="@string/FACEBOOK_UPLOAD"
	android:visibility="invisible" android:layout_width="wrap_content"
	android:layout_height="wrap_content" android:paddingRight="20dp"
	android:paddingLeft="20dp" android:layout_margin="20dp" />

<Button android:id="@+id/requestButton" android:text="@string/REQUEST"
	android:visibility="invisible" android:layout_width="wrap_content"
	android:layout_height="wrap_content" android:paddingRight="20dp"
	android:paddingLeft="20dp" android:layout_margin="20dp" />


<Button android:id="@+id/postButton" android:text="@string/FACEBOOK_WALL_POST"
	android:visibility="invisible" android:layout_width="wrap_content"
	android:layout_height="wrap_content" android:paddingRight="20dp"
	android:paddingLeft="20dp" android:layout_margin="20dp" />

<Button android:id="@+id/deletePostButton" android:text="@string/FACEBOOK_DELETE_POST"
	android:visibility="invisible" android:layout_width="wrap_content"
	android:layout_height="wrap_content" android:paddingRight="20dp"
	android:paddingLeft="20dp" android:layout_margin="20dp" />
</LinearLayout> 

File: Main.java

 
package com.facebook.android;

import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL;

import org.json.JSONException; import org.json.JSONObject;

import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView;

import com.facebook.android.Facebook.DialogListener; import com.facebook.android.SessionEvents.AuthListener; import com.facebook.android.SessionEvents.LogoutListener;

public class Main extends Activity implements OnClickListener
{
	private static final String tag = "Main";
	private LoginButton mLoginButton;
	private TextView mText;
	private Button mRequestButton;
	private Button mPostButton;
	private Button mDeleteButton;
	private Button mUploadButton;

	private Facebook mFacebook;
	private AsyncFacebookRunner mAsyncRunner;

	@Override
	public void onCreate(Bundle savedInstanceState)
		{
			super.onCreate(savedInstanceState);
			Log.d(tag, getResources().getString(R.string.CREATING_VIEW));
			mFacebook = new Facebook(getResources().getString(R.string.FACEBOOK_ID_TEST));
			setContentView(R.layout.facebook_login_view);

			mLoginButton = (LoginButton) this.findViewById(R.id.login);
			mText = (TextView) Main.this.findViewById(R.id.txt);
			mRequestButton = (Button) findViewById(R.id.requestButton);
			mPostButton = (Button) findViewById(R.id.postButton);
			mDeleteButton = (Button) findViewById(R.id.deletePostButton);
			mUploadButton = (Button) findViewById(R.id.uploadButton);

			mFacebook.authorize(this, new DialogListener()
				{
					@Override
					public void onComplete(Bundle values)
						{
						}

					@Override
					public void onFacebookError(FacebookError error)
						{
						}

					@Override
					public void onError(DialogError e)
						{
						}

					@Override
					public void onCancel()
						{
						}
				});

			//
			mAsyncRunner = new AsyncFacebookRunner(mFacebook);

			SessionStore.restore(mFacebook, this);
			SessionEvents.addAuthListener(new SampleAuthListener());
			SessionEvents.addLogoutListener(new SampleLogoutListener());
			mLoginButton.init(this, mFacebook);

			mRequestButton.setOnClickListener(this);

			mRequestButton.setVisibility(mFacebook.isSessionValid() ? View.VISIBLE : View.INVISIBLE);

			mUploadButton.setOnClickListener(this);

			mUploadButton.setVisibility(mFacebook.isSessionValid() ? View.VISIBLE : View.INVISIBLE);

			mPostButton.setOnClickListener(this);

			mPostButton.setVisibility(mFacebook.isSessionValid() ? View.VISIBLE : View.INVISIBLE);

		}
	@Override
	public void onActivityResult(int requestCode, int resultCode, Intent data)
		{
			super.onActivityResult(requestCode, resultCode, data);
			mFacebook.authorizeCallback(requestCode, resultCode, data);
		}

	//
	public class SampleAuthListener implements AuthListener
		{

			@Override
			public void onAuthSucceed()
				{
					mText.setText("You have logged in! ");
					mRequestButton.setVisibility(View.VISIBLE);
					mUploadButton.setVisibility(View.VISIBLE);
					mPostButton.setVisibility(View.VISIBLE);
				}

			@Override
			public void onAuthFail(String error)
				{
					mText.setText("Login Failed: " + error);
				}
		}

	public class SampleLogoutListener implements LogoutListener
		{
			@Override
			public void onLogoutBegin()
				{
					mText.setText("Logging out...");
				}

			@Override
			public void onLogoutFinish()
				{
					mText.setText("You have logged out! ");
					mRequestButton.setVisibility(View.INVISIBLE);
					mUploadButton.setVisibility(View.INVISIBLE);
					mPostButton.setVisibility(View.INVISIBLE);
				}
		}

	public class SampleRequestListener extends BaseRequestListener
		{

			@Override
			public void onComplete(final String response, final Object state)
				{
					try
						{
							// process the response here: executed in background thread
							Log.d("Facebook-Example", "Response: " + response.toString());
							JSONObject json = Util.parseJson(response);
							final String name = json.getString("name");

							// then post the processed result back to the UI thread
							// if we do not do this, an runtime exception will be generated
							// e.g. "CalledFromWrongThreadException: Only the original
							// thread that created a view hierarchy can touch its views."
							Main.this.runOnUiThread(new Runnable()
								{
									@Override
									public void run()
										{
											mText.setText("Hello there, " + name + "!");
										}
								});
						}
					catch (JSONException e)
						{
							Log.w("Facebook-Example", "JSON Error in response");
						}
					catch (FacebookError e)
						{
							Log.w("Facebook-Example", "Facebook Error: " + e.getMessage());
						}
				}
		}

	public class SampleUploadListener extends BaseRequestListener
		{

			@Override
			public void onComplete(final String response, final Object state)
				{
					try
						{
							// process the response here: (executed in background thread)
							Log.d("Facebook-Example", "Response: " + response.toString());
							JSONObject json = Util.parseJson(response);
							final String src = json.getString("src");

							// then post the processed result back to the UI thread
							// if we do not do this, an runtime exception will be generated
							// e.g. "CalledFromWrongThreadException: Only the original
							// thread that created a view hierarchy can touch its views."
							Main.this.runOnUiThread(new Runnable()
								{
									@Override
									public void run()
										{
											mText.setText("Hello there, photo has been uploaded at \n" + src);
										}
								});
						}
					catch (JSONException e)
						{
							Log.w("Facebook-Example", "JSON Error in response");
						}
					catch (FacebookError e)
						{
							Log.w("Facebook-Example", "Facebook Error: " + e.getMessage());
						}
				}
		}

	public class WallPostRequestListener extends BaseRequestListener
		{

			@Override
			public void onComplete(final String response, final Object state)
				{
					Log.d("Facebook-Example", "Got response: " + response);
					String message = "<empty>";
					try
						{
							JSONObject json = Util.parseJson(response);
							message = json.getString("message");
						}
					catch (JSONException e)
						{
							Log.w("Facebook-Example", "JSON Error in response");
						}
					catch (FacebookError e)
						{
							Log.w("Facebook-Example", "Facebook Error: " + e.getMessage());
						}
					final String text = "Your Wall Post: " + message;
					Main.this.runOnUiThread(new Runnable()
						{
							@Override
							public void run()
								{
									mText.setText(text);
								}
						});
				}
		}

	public class WallPostDeleteListener extends BaseRequestListener
		{

			@Override
			public void onComplete(final String response, final Object state)
				{
					if (response.equals("true"))
						{
							Log.d("Facebook-Example", "Successfully deleted wall post");
							Main.this.runOnUiThread(new Runnable()
								{
									@Override
									public void run()
										{
											mDeleteButton.setVisibility(View.INVISIBLE);
											mText.setText("Deleted Wall Post");
										}
								});
						}
					else
						{
							Log.d("Facebook-Example", "Could not delete wall post");
						}
				}
		}

	public class SampleDialogListener extends BaseDialogListener
		{

			@Override
			public void onComplete(Bundle values)
				{
					final String postId = values.getString("post_id");
					if (postId != null)
						{
							Log.d("Facebook-Example", "Dialog Success! post_id=" + postId);
							mAsyncRunner.request(postId, new WallPostRequestListener());
							mDeleteButton.setOnClickListener(new OnClickListener()
								{
									@Override
									public void onClick(View v)
										{
											mAsyncRunner.request(postId, new Bundle(), "DELETE", new WallPostDeleteListener(), null);
										}
								});
							mDeleteButton.setVisibility(View.VISIBLE);
						}
					else
						{
							Log.d("Facebook-Example", "No wall post made");
						}
				}
		}

	/*
	 * (non-Javadoc)
	 * 
	 * @see android.view.View.OnClickListener#onClick(android.view.View)
	 */
	@Override
	public void onClick(View v)
		{

			if (v == mLoginButton)
				{

				}

			if (v == mRequestButton)
				{
					mAsyncRunner.request("me", new SampleRequestListener());
				}

			if (v == mUploadButton)
				{
					Bundle params = new Bundle();
					params.putString("method", "photos.upload");

					URL uploadFileUrl = null;
					try
						{
							uploadFileUrl = new URL("http://www.facebook.com/images/devsite/iphone_connect_btn.jpg");
						}
					catch (MalformedURLException e)
						{
							e.printStackTrace();
						}
					try
						{
							HttpURLConnection conn = (HttpURLConnection) uploadFileUrl.openConnection();
							conn.setDoInput(true);
							conn.connect();
							int length = conn.getContentLength();

							byte[] imgData = new byte[length];
							InputStream is = conn.getInputStream();
							is.read(imgData);
							params.putByteArray("picture", imgData);

						}
					catch (IOException e)
						{
							e.printStackTrace();
						}

					mAsyncRunner.request(null, params, "POST", new SampleUploadListener(), null);
				}

			if (v == mPostButton)
				{
					mFacebook.dialog(Main.this, "feed", new SampleDialogListener());
				}
			if (v == mDeleteButton)
				{

				}
		}