Integrando aplicações Android com o Facebook

set PATH=%PATH%;C:\openssl-0.9.8k_WIN32\bin

keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore |
   openssl sha1 -binary | openssl base64

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="devmedia.artigo.weslley"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="10" />
    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".DevmediaFacebookActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ScrollView
        android:id="@+id/scrollView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_alignParentLeft="true"
            android:layout_alignParentTop="true"
            android:orientation="vertical" >

            <TextView
                android:id="@+id/textView1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="O que você está pensando?"
                android:textAppearance="?android:attr/textAppearanceLarge" />

            <EditText
                android:id="@+id/editText1"
                android:layout_width="match_parent"
                android:hint="Digite algo para seus amigos"
                android:layout_height="wrap_content" />

            <ImageView
                android:id="@+id/imageView1"
                android:layout_width="200dp"
                android:layout_height="200dp"
                android:layout_gravity="center"
                android:maxHeight="64dp"
                android:maxWidth="64dp"
                android:minHeight="64dp"
                android:minWidth="64dp"
                android:scaleType="fitXY"
                android:src="@drawable/semimg" />

            <LinearLayout
                android:id="@+id/linearLayout2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" >

                <Button
                    android:id="@+id/button3"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:onClick="galleryButtonClick"
                    android:text="Buscar Imagem" />
            </LinearLayout>

            <LinearLayout
                android:id="@+id/linearLayout1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" >

                <Button
                    android:id="@+id/button1"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:onClick="updateStatusClick"
                    android:text="Postar" />
            </LinearLayout>
        </LinearLayout>
    </ScrollView>

</LinearLayout>

package devmedia.artigo.weslley;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.MalformedURLException;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.ActivityInfo;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

import com.facebook.android.AsyncFacebookRunner;
import com.facebook.android.AsyncFacebookRunner.RequestListener;
import com.facebook.android.DialogError;
import com.facebook.android.Facebook;
import com.facebook.android.Facebook.DialogListener;
import com.facebook.android.FacebookError;

public class DevmediaFacebookActivity extends Activity {

	private static final String APP_ID = "AQUI IRÁ O APP ID DE SUA APLICAÇÃO";

	private static final String ACCESS_EXPIRES = "access_expires";
	private static final String ACCESS_TOKEN = "access_token";

	private Facebook facebook;
	private SharedPreferences prefs;

	private Bitmap fotoTirada;
	private ImageView imageView1;
	private File caminhoFoto;

	private Bitmap image;

	String[] salvarimg = new String[0];

	String corpo;

	private int cont = 0;
 

    
public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.main);
	facebook = new Facebook(APP_ID);
	prefs = getPreferences(MODE_PRIVATE);
	// Carrega a accessToken para saber se o usuário
	// já se autenticou.
	loadAccessToken();

	// Caso não tenha se autenticado, abre o login
	if (!facebook.isSessionValid()) {

		// Chama a tela de login do facebook
		facebook.authorize(this, new String[] { "publish_stream" },
		new DialogListener() {
		// Login com sucesso, salva o accessToken
		public void onComplete(Bundle values) {
	      saveAccessToken();
		}

		// Os métodos abaixo devem ser
		// implementados para tratatmento dos
		// fluxos width="640" alternativos
		public void onFacebookError(FacebookError error) {
		}

		public void onError(DialogError e) {
		}

		public void onCancel() {
		}
	});
	this.setRequestedOrientation
		(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
	}

	imageView1 = (ImageView) findViewById(R.id.imageView1);
}

                                                                                                 
	public void galleryButtonClick(View v) {
		// apagaTemp();

		Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
		intent.setType("image/*");
		startActivityForResult(intent, 0);

		cont++;
	}

	// Evento de clique do botão para atualizar o status
	public void updateStatusClick(View v) {
		EditText edt = (EditText) findViewById(R.id.editText1);

		if ((edt.getText().toString().trim().equals(""))
			|| (edt.getText().toString() == null)) {

			Toast.makeText(this, "Ops!!!, Digite algo para seus amigos...",
			Toast.LENGTH_LONG).show();

		} else if ((edt.getText().toString().trim().equals(""))
			|| (edt.getText().toString() == null) || cont > 0) {

			corpo = edt.getText().toString();
			
			sendPhoto(edt.getText().toString());

		} else if (cont == 0) {

			corpo = edt.getText().toString();

			updateStatus(edt.getText().toString());
			

		}

		edt.setText("Aguarde enquanto publicamos o seu post, isso pode demorar um pouco...");
		edt.setEnabled(false);

	}

	private RequestListener requestListener = new RequestListener() {
		public void onMalformedURLException(MalformedURLException e,
			Object state) {
			showToast("URL mal formada");
		}

		public void onIOException(IOException e, Object state) {
			showToast("Problema de comunicação");
		}

		public void onFileNotFoundException(FileNotFoundException e,
			Object state) {
			showToast("Recurso não existe");
		}

		public void onFacebookError(FacebookError e, Object state) {
			showToast("Erro no Facebook: " + e.getLocalizedMessage());
		}

		public void onComplete(String response, Object state) {
			
			showToast("Publicação realizada com sucesso");

		}
	};

	// Método que efetivamente atualiza o status
	private void updateStatus(String status) {
		AsyncFacebookRunner runner = new AsyncFacebookRunner(facebook);

		Bundle params = new Bundle();
		params.putString("message", status);
		runner.request("me/feed", params, "POST", requestListener, null);
	}

	// Método que efetivamente atualiza o status com imagem
	private void sendPhoto(String status) {
		AsyncFacebookRunner runner = new AsyncFacebookRunner(facebook);

		ByteArrayOutputStream baos = new ByteArrayOutputStream();

		image.compress(Bitmap.CompressFormat.PNG, 100, baos);

		byte[] bytes = baos.toByteArray();

		Bundle params = new Bundle();
		params.putByteArray("picture", bytes);
		params.putString("message", status);

		runner.request("me/photos", params, "POST", requestListener, null);
	}

	private void showToast(final String s) {
		final Context ctx = DevmediaFacebookActivity.this;
		runOnUiThread(new Runnable() {
			public void run() {
				Toast.makeText(ctx, s, Toast.LENGTH_SHORT).show();
			}
		});
	}

	private void saveAccessToken() {
		SharedPreferences.Editor editor = prefs.edit();
		editor.putString(ACCESS_TOKEN, facebook.getAccessToken());
		editor.putLong(ACCESS_EXPIRES, facebook.getAccessExpires());
		editor.commit();
	}

	private void loadAccessToken() {
		String access_token = prefs.getString(ACCESS_TOKEN, null);
		long expires = prefs.getLong(ACCESS_EXPIRES, 0);
		if (access_token != null) {
			facebook.setAccessToken(access_token);
		}
		if (expires != 0) {
			facebook.setAccessExpires(expires);
		}
	}

	public void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);

		if (cont == 0) {
			// A API do Facebook exige essa chamada para
			// concluir o processo de login.
			facebook.authorizeCallback(requestCode, resultCode, data);
		} else {

			if (resultCode == RESULT_OK) {
				switch (requestCode) {
				case 0:

					Uri selectedImage = data.getData();
					String[] filePathColumn = { MediaStore.Images.Media.DATA };

					Cursor cursor = getContentResolver().query(selectedImage,
						filePathColumn, null, null, null);
					cursor.moveToFirst();

					int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
					String filePath = cursor.getString(columnIndex); // file
						// path of selected image
					cursor.close();

					Bitmap yourSelectedImage = BitmapFactory
						.decodeFile(filePath);

					imageView1.setImageBitmap(yourSelectedImage);

					image = yourSelectedImage;

					break;

				case 1:
					fotoTirada = BitmapFactory.decodeFile(caminhoFoto
						.getAbsolutePath());
					imageView1.setImageBitmap(fotoTirada);
					break;
				}
			}

		}
	}

}