Android Facebook SDK for Android How to add Facebook Login in Android
Example
Add below dependencies to your build.gradle
// Facebook login
compile 'com.facebook.android:facebook-android-sdk:4.21.1'
Add below helper class to your utility package:
/**
* Created by Andy
* An utility for Facebook
*/
public class FacebookSignInHelper {
private static final String TAG = FacebookSignInHelper.class.getSimpleName();
private static FacebookSignInHelper facebookSignInHelper = null;
private CallbackManager callbackManager;
private Activity mActivity;
private static final Collection<String> PERMISSION_LOGIN = (Collection<String>) Arrays.asList("public_profile", "user_friends","email");
private FacebookCallback<LoginResult> loginCallback;
public static FacebookSignInHelper newInstance(Activity context) {
if (facebookSignInHelper == null)
facebookSignInHelper = new FacebookSignInHelper(context);
return facebookSignInHelper;
}
public FacebookSignInHelper(Activity mActivity) {
try {
this.mActivity = mActivity;
// Initialize the SDK before executing any other operations,
// especially, if you're using Facebook UI elements.
FacebookSdk.sdkInitialize(this.mActivity);
callbackManager = CallbackManager.Factory.create();
loginCallback = new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
// You are logged into Facebook
}
@Override
public void onCancel() {
Log.d(TAG, "Facebook: Cancelled by user");
}
@Override
public void onError(FacebookException error) {
Log.d(TAG, "FacebookException: " + error.getMessage());
}
};
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* To login user on facebook without default Facebook button
*/
public void loginUser() {
try {
LoginManager.getInstance().registerCallback(callbackManager, loginCallback);
LoginManager.getInstance().logInWithReadPermissions(this.mActivity, PERMISSION_LOGIN);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* To log out user from facebook
*/
public void signOut() {
// Facebook sign out
LoginManager.getInstance().logOut();
}
public CallbackManager getCallbackManager() {
return callbackManager;
}
public FacebookCallback<LoginResult> getLoginCallback() {
return loginCallback;
}
/**
* Attempts to log debug key hash for facebook
*
* @param context : A reference to context
* @return : A facebook debug key hash
*/
public static String getKeyHash(Context context) {
String keyHash = null;
try {
PackageInfo info = context.getPackageManager().getPackageInfo(
context.getPackageName(),
PackageManager.GET_SIGNATURES);
for (Signature signature : info.signatures) {
MessageDigest md = MessageDigest.getInstance("SHA");
md.update(signature.toByteArray());
keyHash = Base64.encodeToString(md.digest(), Base64.DEFAULT);
Log.d(TAG, "KeyHash:" + keyHash);
}
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return keyHash;
}
}
Add below code in Your Activity:
FacebookSignInHelper facebookSignInHelper = FacebookSignInHelper.newInstance(LoginActivity.this, fireBaseAuthHelper);
facebookSignInHelper.loginUser();
Add below code to your OnActivityResult:
facebookSignInHelper.getCallbackManager().onActivityResult(requestCode, resultCode, data);
