ANDROID FACEBOOK CONNECT TUTORIAL Source code : AndroidFacebookConnect.zip Generating App Signature for Facebook Settings To create facebook android native app you need to provide your
Trang 1ANDROID FACEBOOK CONNECT TUTORIAL
Source 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 openssl installed on your pc If you don’t have
one download openssl from here and 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 don’t ask for
password your keystore path is incorrect
keytool -exportcert -alias androiddebugkey -keystore "<path-to-users
directory>\.android\debug.keystore" | openssl sha1 -binary | openssl base64
check the following command how i generated hashkey on my pc
"C:\Users\Ravi\.android\debug.keystore" | openssl sha1 -binary | openssl base64
Registering your Facebook Application
After generating your app signature successfully, register your facebook application by going
to create new facebook application and fill out all the information needed And select Native
Android App and give your hashkey there which you generated previously using keytool
Trang 2and note down your facebook App ID
Trang 3Creating 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
(git clone git://github.com/facebook/facebook-android-sdk.git)
2 In your Eclipse goto File ⇒ Import ⇒ Existing Projects into Workspace and select the facebook
project you downloaded from git repository
Trang 4Creating 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
Trang 7Now 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
<uses-permission android:name="android.permission.INTERNET"/>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.facebook.androidhive"
android:versionCode="1"
android:versionName="1.0" >
Trang 8
<uses-sdk android:minSdkVersion="8" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".AndroidFacebookConnectActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<! Connect to Internet Permissions >
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>
4 Open Your Main Activity Class and initialize all the variables needed
publicclassAndroidFacebookConnectActivity extendsActivity {
// Your Facebook APP ID
private static String APP_ID = "308180782571605"; // Replace your App ID here
// Instance of Facebook Class
privateFacebook facebook;
privateAsyncFacebookRunner mAsyncRunner;
String FILENAME = "AndroidSSO_data";
privateSharedPreferences mPrefs;
@Override
publicvoidonCreate(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();
Trang 9Login button click event
btnFbLogin.setOnClickListener(newView.OnClickListener() {
@Override
publicvoidonClick(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() {
@Override
publicvoidonCancel() {
// Function to handle cancel event
}
@Override
publicvoidonComplete(Bundle values) {
// Function to handle complete event
// Edit Preferences and update facebook acess_token SharedPreferences.Editor editor = mPrefs.edit();
editor.putString("access_token",
facebook.getAccessToken());
editor.putLong("access_expires",
facebook.getAccessExpires());
editor.commit();
}
@Override
publicvoidonError(DialogError error) {
// Function to handle error
}
@Override
Trang 10publicvoidonFacebookError(FacebookError fberror) {
// Function to handle Facebook errors
}
});
}
}
Trang 12Posting Message to Facebook Wall
write a click event for post to wall button and inside click event write a function namedpostToWall()
btnPostToWall.setOnClickListener(newView.OnClickListener() {
@Override
publicvoidonClick(View v) {
postToWall();
}
});
and function body for postToWall() function is:
publicvoidpostToWall() {
// post on user's wall
facebook.dialog(this, "feed", newDialogListener() {
@Override
publicvoidonFacebookError(FacebookError e) {
}
@Override
publicvoidonError(DialogError e) {
}
@Override
publicvoidonComplete(Bundle values) {
}
@Override
publicvoidonCancel() {
}
});
}
Trang 14Getting 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 to facebook profile graph api and will get profile information from facebook
getProfileInformation()
publicvoidgetProfileInformation() {
mAsyncRunner.request("me", newRequestListener() {
@Override
publicvoidonComplete(String response, Object state) {
Log.d("Profile", response);
String json = response;
try{
JSONObject profile = newJSONObject(json);
// getting name of the user
String name = profile.getString("name");
// getting email of the user
String email = profile.getString("email");
runOnUiThread(newRunnable() {
@Override
publicvoidrun() {
Toast.makeText(getApplicationContext(), "Name: " + name + "\nEmail: "+ email, Toast.LENGTH_LONG).show();
}
});
} catch(JSONException e) {
e.printStackTrace();
}
Trang 15}
@Override
publicvoidonIOException(IOException e, Object state) {
}
@Override
publicvoidonFileNotFoundException(FileNotFoundException e,
Object state) {
}
@Override
publicvoidonMalformedURLException(MalformedURLException e,
Object state) {
}
@Override
publicvoidonFacebookError(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": {
Trang 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.abo ut.me/rv",
"timezone": 5.5,
"locale": "en_US",
"languages": [
Trang 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 user’s other information like checkins, friends list etc., you need to extend facebook permissions while logging in user Check list of facebook permissions
facebook.authorize(this, newString[] { "email", "publish_checkins",
"publish_stream"},
newDialogListener() {
@Override
publicvoidonComplete(Bundle values) {}
@Override
publicvoidonFacebookError(FacebookError error) {}
@Override
publicvoidonError(DialogError e) {}
@Override
publicvoidonCancel() {}
}
);
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
Trang 18String 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 can’t make request to facebook from your app logoutFromFacebook();
publicvoidlogoutFromFacebook() {
mAsyncRunner.logout(this, newRequestListener() {
@Override
publicvoidonComplete(String response, Object state) {
Log.d("Logout from Facebook", response);
if(Boolean.parseBoolean(response) == true) {
// User successfully Logged out
}
}
@Override
publicvoidonIOException(IOException e, Object state) {
}
@Override
publicvoidonFileNotFoundException(FileNotFoundException e,
Object state) {
}
@Override
publicvoidonMalformedURLException(MalformedURLException e,
Object state) {
}
@Override
publicvoidonFacebookError(FacebookError e, Object state) {
}
});
}