huong dan xay dung ung dung facebook

8/2/2019 Huong Dan Xay Dung Ung Dung Facebook

1/18

Su tm v bin son bi Thuviendientu.org

1

ANDROID FACEBOOK CONNECT TUTORIALSource code : AndroidFacebookConnect.zip

Generating App Signature for Facebook Settings

To create facebook android native app you need to provide your Android application signature in

facebook app settings. You can generate your application signature (keyhash) usingkeytool that

comes with java. But to generate signature you need opensslinstalled on your pc. If you dont have

one download openssl fromhereand set it in your system environment path.

Open your command prompt (CMD) and run the following command to generate your keyhash.

While generating hashkey it should ask you password. Give password as android. If it dont ask for

password your keystore path is incorrect.

keytool -exportcert -alias androiddebugkey -keystore "\.android\debug.keystore" | openssl sha1 -binary | openssl base64

check the following command how i generated hashkey on my pc.

keytool -exportcert -alias androiddebugkey -keystore"C:\Users\Ravi\.android\debug.keystore" | openssl sha1 -binary | opensslbase64

Registering your Facebook Application

After generating your app signature successfully, register your facebook application by going

tocreate new facebook applicationand fill out all the information needed. And select Native

Android App and give your hashkey there which you generated previously using keytool.
http://code.google.com/p/openssl-for-windows/downloads/detail?name=openssl-0.9.8k_WIN32.zip&can=2&q=http://code.google.com/p/openssl-for-windows/downloads/detail?name=openssl-0.9.8k_WIN32.zip&can=2&q=http://code.google.com/p/openssl-for-windows/downloads/detail?name=openssl-0.9.8k_WIN32.zip&can=2&q=https://developers.facebook.com/appshttps://developers.facebook.com/appshttps://developers.facebook.com/appshttps://developers.facebook.com/appshttp://code.google.com/p/openssl-for-windows/downloads/detail?name=openssl-0.9.8k_WIN32.zip&can=2&q=


2/18


3/18


3

Creating Facebook Reference Project

Once you are done with registering your facebook application, you need to download facebook SDK

and create a new reference project. This reference project will be used to compile your actual

project.

1. Downloadfacebook android SDKfrom git repositories.

(git clone git://github.com/facebook/facebook-android-sdk.git)

2. In your Eclipse goto File Import Existing Projects into Workspace and select the facebookproject you downloaded from git repository.
https://github.com/facebook/facebook-android-sdkhttps://github.com/facebook/facebook-android-sdkhttps://github.com/facebook/facebook-android-sdkhttps://github.com/facebook/facebook-android-sdk


4/18


4

Creating Your Facebook Connect Project

1. Create new Project in your Eclipse IDE. File New Android Project and fill out all the details.

2. Now we need to add reference of this project to existing facebook project. Right Click on Project

Properties android Click on Add button select your facebook project Click Apply.


5/18


5


6/18


6


7/18


7

Now our project setup is done. We can start coding our facebook application.

3. Open your AndroidManifest.xml file add network connect permission in order to connect to

internet.

AndroidManifest.xml


8/18


8

4. Open Your Main Activity Class and initialize all the variables needed.

publicclassAndroidFacebookConnectActivity extendsActivity {// Your Facebook APP IDprivatestatic String APP_ID = "308180782571605"; // Replace your App ID

here// Instance of Facebook ClassprivateFacebook facebook;privateAsyncFacebookRunner mAsyncRunner;String FILENAME = "AndroidSSO_data";privateSharedPreferences mPrefs;@OverridepublicvoidonCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState); setContentView(R.layout.main); facebook = newFacebook(APP_ID);mAsyncRunner = newAsyncFacebookRunner(facebook);

5. I created a simple interface which contains button to login, post to wall, show access tokens and

logout for testing purpose.

Login to Facebook Account

I used a button to login into facebook account. In your activity write a click event for Login button

click. Inside click event declare a function named loginToFacebook();


9/18


9

Login button click event

btnFbLogin.setOnClickListener(new View.OnClickListener() {@OverridepublicvoidonClick(View v) {

loginToFacebook();}

});

and function body for loginToFacebook() function is:

publicvoidloginToFacebook() {mPrefs = getPreferences(MODE_PRIVATE);String access_token = mPrefs.getString("access_token", null);longexpires = mPrefs.getLong("access_expires", 0);if(access_token != null) {

facebook.setAccessToken(access_token); }if(expires != 0) {

facebook.setAccessExpires(expires); }if(!facebook.isSessionValid()) {

facebook.authorize(this,newString[] { "email", "publish_stream"},newDialogListener() {

@Overridepublic

void

onCancel() {

// Function to handle cancel event

}@OverridepublicvoidonComplete(Bundle values) {

// Function to handle complete event// Edit Preferences and update facebook acess_tokenSharedPreferences.Editor editor = mPrefs.edit();editor.putString("access_token",

facebook.getAccessToken());editor.putLong("access_expires",

facebook.getAccessExpires()); editor.commit();

}@OverridepublicvoidonError(DialogError error) {

// Function to handle error}@Override


10/18


10

publicvoidonFacebookError(FacebookError fberror) {// Function to handle Facebook errors

}});

}}


11/18


11


12/18


13/18


13


14/18


14

Getting Profile Information from Facebook

To get profile information we need to make an api request to facebook graph API. Following is a

function that will make an api request tofacebook profile graph apiand will get profile information

from facebook.

getProfileInformation()publicvoidgetProfileInformation() {

mAsyncRunner.request("me", newRequestListener() {@Overridepublic

void

onComplete(String response, Object state) {

Log.d("Profile", response);String json = response;try{

JSONObject profile = newJSONObject(json);// getting name of the userString name = profile.getString("name");// getting email of the userString email = profile.getString("email");runOnUiThread(newRunnable() {

@Overridepublic

void

run() {

Toast.makeText(getApplicationContext(), "Name: " +

name + "\nEmail: "+ email, Toast.LENGTH_LONG).show();}

});} catch(JSONException e) {

e.printStackTrace();}
https://developers.facebook.com/docs/reference/api/https://developers.facebook.com/docs/reference/api/https://developers.facebook.com/docs/reference/api/https://graph.facebook.com/me/?access_token=AAAAAAITEghMBAHpMeQF01tn2qfZAe1Fdm5ksIs2Sj78PAkrZAZCLiZAqzsDPUbhaT2e0wwzUcQtGoKQms3EDY82UMTjx0zlZBjcgPfzZCYWaZAHs4NTjEhKhttps://graph.facebook.com/me/?access_token=AAAAAAITEghMBAHpMeQF01tn2qfZAe1Fdm5ksIs2Sj78PAkrZAZCLiZAqzsDPUbhaT2e0wwzUcQtGoKQms3EDY82UMTjx0zlZBjcgPfzZCYWaZAHs4NTjEhKhttps://graph.facebook.com/me/?access_token=AAAAAAITEghMBAHpMeQF01tn2qfZAe1Fdm5ksIs2Sj78PAkrZAZCLiZAqzsDPUbhaT2e0wwzUcQtGoKQms3EDY82UMTjx0zlZBjcgPfzZCYWaZAHs4NTjEhKhttps://graph.facebook.com/me/?access_token=AAAAAAITEghMBAHpMeQF01tn2qfZAe1Fdm5ksIs2Sj78PAkrZAZCLiZAqzsDPUbhaT2e0wwzUcQtGoKQms3EDY82UMTjx0zlZBjcgPfzZCYWaZAHs4NTjEhKhttps://developers.facebook.com/docs/reference/api/


15/18


15

}@OverridepublicvoidonIOException(IOException e, Object state) {}@OverridepublicvoidonFileNotFoundException(FileNotFoundException e,

Object state) {}@OverridepublicvoidonMalformedURLException(MalformedURLException e,

Object state) {}@OverridepublicvoidonFacebookError(FacebookError e, Object state) {}

});}

The above function will get json data from facebook. You need to parse the json in order to get

individual profile data. If you are not aware of json parsing look at this article. Android JSON Parsing

Tutorial.

The sample profile json from facebook will be like this

{"id": "1464730016","name": "Ravi Tamada","first_name": "Ravi","last_name": "Tamada","link": "https://www.facebook.com/ravi8x","username": "ravi8x","birthday": "12/22/1988","hometown": {

"id": "112158005464147","name": "Baruva"

},"location": {

"id": "102186159822587","name": "Chennai, Tamil Nadu"

},"bio": "Author: www.androidhive.info\r\nCo-author: www.9lessons.info","work": [

{"employer": {

"id": "179366562092719","name": "ByteAlly"

},"location": {
http://www.androidhive.info/2012/01/android-json-parsing-tutorial/http://www.androidhive.info/2012/01/android-json-parsing-tutorial/http://www.androidhive.info/2012/01/android-json-parsing-tutorial/http://www.androidhive.info/2012/01/android-json-parsing-tutorial/https://www.facebook.com/ravi8xhttps://www.facebook.com/ravi8xhttps://www.facebook.com/ravi8xhttp://www.androidhive.info/2012/01/android-json-parsing-tutorial/http://www.androidhive.info/2012/01/android-json-parsing-tutorial/


16/18


16

"id": "102186159822587","name": "Chennai, Tamil Nadu"

},"position": {

"id": "124917314217511","name": "Product Head"

}]

}],"favorite_athletes": [

{"id": "18620649907","name": "Virat Kohli"

}],"education": [

{"school": {

"id": "131587206873093","name": "Raghu Engineering College (REC)"},

"degree": {"id": "140065339390579","name": "B.Tech"

},"year": {

"id": "142963519060927","name": "2010"

},"type": "Graduate School","classes": [

{"id": "192259410803415","name": "2010","with": [

{"id": "584960408","name": "Santosh Patnaik"

}],"from": {

"id": "584960408","name": "Santosh Patnaik"

}}

]}],

"gender": "male","relationship_status": "Single","website":

"www.androidhive.info\nwww.9lessons.info\nwww.twitter.com/ravitamada\nwww.about.me/rv",

"timezone": 5.5,"locale": "en_US","languages": [


17/18


17

{"id": "106059522759137","name": "English"

},{

"id": "107617475934611","name": "Telugu"

},{

"id": "112969428713061","name": "Hindi"

},{

"id": "343306413260","name": "Tamil"

}],"verified": true,"updated_time": "2012-03-02T17:04:18+0000"

}Extending facebook Permissions

If you want users other information like checkins, friends list etc., you need to extend facebook

permissions while logging in user. Check list offacebook permissions

facebook.authorize(this, newString[] { "email", "publish_checkins","publish_stream"},

newDialogListener() {@Overridepublic

void

onComplete(Bundle values) {}

@OverridepublicvoidonFacebookError(FacebookError error) {}@OverridepublicvoidonError(DialogError e) {}@OverridepublicvoidonCancel() {}

});Getting Access Token

Sometimes you might needed users access token for future purpose usage. Following code will give

you currently logged in user access token.
https://developers.facebook.com/docs/reference/api/permissions/https://developers.facebook.com/docs/reference/api/permissions/https://developers.facebook.com/docs/reference/api/permissions/https://developers.facebook.com/docs/reference/api/permissions/


18/18


18

String access_token = facebook.getAccessToken();

Logout from your app

When user want to stop using facebook for your app, you can provide logout method to clear app

state and invalidate access token. So further you cant make request to facebook from your app.

logoutFromFacebook();publicvoidlogoutFromFacebook() {

mAsyncRunner.logout(this, newRequestListener() {@OverridepublicvoidonComplete(String response, Object state) {

Log.d("Logout from Facebook", response);if(Boolean.parseBoolean(response) == true) {

// User successfully Logged out}

}@OverridepublicvoidonIOException(IOException e, Object state) {}@OverridepublicvoidonFileNotFoundException(FileNotFoundException e,

Object state) {}@OverridepublicvoidonMalformedURLException(MalformedURLException e,Object state) {}@OverridepublicvoidonFacebookError(FacebookError e, Object state) {}

});}

huong dan xay dung ung dung facebook

Documents