How to Login with Facebook:
follow the below steps to add login via facebook:
step1: register app on developers.facebook.com
step 2: get the app_id , add it to strings file and add following code to manifest file:
<meta-data
android:name=”com.facebook.sdk.ApplicationId”
android:value=”@string/app_id” />
//add meta-data inside appication tag.
<activity android:name=”com.facebook.LoginActivity” >
</activity>
step 3: Download latest facebooksdk and import it as project in your project
step 4: add following code onclick of login with facebook button:
try {
PackageInfo info = getPackageManager().getPackageInfo( “package_name”, PackageManager.GET_SIGNATURES);
for (Signature signature : info.signatures)
{
MessageDigest md = MessageDigest.getInstance(“SHA”); md.update(signature.toByteArray());
Log.d(“KeyHash:”, Base64.encodeToString(md.digest(), Base64.DEFAULT));
}
} catch (NameNotFoundException e) {
} catch (NoSuchAlgorithmException e) {
} //
//Get keyhash from above code and add it to developers.facebook in your project
session1 = Session.getActiveSession();
if (session1 == null)
{ session1 = new Session(Login.this);
Session.setActiveSession(session1);
if (session1.getState().equals( SessionState.CREATED_TOKEN_LOADED))
{
session1.openForRead(new Session.OpenRequest(Login.this) .setCallback(statusCallback));
access_token = session1.getAccessToken();
}
}
if (!session1.isOpened() && !session1.isClosed())
{
session1.openForRead(new Session.OpenRequest(Login.this) .setCallback(statusCallback));
access_token = session1.getAccessToken();
} else
{
Session.openActiveSession(Login.this, true, statusCallback);
access_token = session1.getAccessToken();
}
}
/// Add this method to your code:
private Session.StatusCallback statusCallback = new Session.StatusCallback() {
@Override public void call(Session session, SessionState state, Exception exception) {
if (session.isOpened()) {
Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
public void onCompleted(GraphUser user, Response response) {
if (user != null) {
user.getId();
fbid = user.getId();
fbname = user.getName();
} } });
} }
};
//override this method of activity:
@Override public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Session.getActiveSession() .onActivityResult(this, requestCode, resultCode, data);
}
–>How to Get Facebook friendlist:
Create async task and use below url to get facebookfriend list:
https://graph.facebook.com/me/friends?access_token=”session access_token”
Note: parse the data using Json .
–>How to share on friends wall:
add below code to share on friends wall:
private void publishFeedDialog(int position) {
try{
Bundle params = new Bundle();
params.putString(“message”,”YOUR MESSAGE” );
params.putString(“to”,”Friends userid”);
WebDialog feedDialog = ( new WebDialog.FeedDialogBuilder(Context, Session.getActiveSession(), params)) .setOnCompleteListener(null) .build();
feedDialog.show();
} catch(Exception e){
e.printStackTrace(); }
}
–> How to Get NewsFeed:
Use below url to get newsfeed:
link: https://graph.facebook.com/me/home?access_token=access_token
Note: use Json parsing to retrive details of each newsfeed.
