Learn easy steps to login with Facebook Android SDK and save user details. Mostly apps use Facebook login feature to get user info without giving a long form to fill up data and save them. Here is simple steps:-
Facebook Steps
Go to Facebook developer console:- Facebook Developer Console and create an app, enter all description, images, banner in App Details and put it into live mode in Status & Review . After that go to Dashboard and click on Getting Started button and select Android and than follow the given steps there. Download Facebook Android SDK, generate hash, put all info there. Some basic questions:-
Question:- How to generate hash?
Answer:- Download openssl.exe from official site or from code.google.com (I downloaded from official site)and unzip it. Open command prompt and type below command to generate hash:
keytool -exportcert -alias mykey -keystore %HOMEPATH%\.android\debug.keystore | "C:\openssl\openssl.exe" sha1 -binary | "C:\openssl\openssl.exe" base64
cmd will ask password than generate hash and in my case, openssl.exe was in C:\openssl\ directory so change it accordingly. Copy your app id and now you have all done from Facebook side.
Project Steps
Open facebook project module and define a string "facebook_app_id" in string.xml file.
<string name="facebook_app_id">625178694184501</string>
change it with your app id. now change manifest file of Facebook project:-
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.facebook">
<uses-sdk android:minSdkVersion="9"/>
<uses-permission android:name="android.permission.INTERNET"/>
<application>
<activity android:name="com.facebook.FacebookActivity"
android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:theme="@android:style/Theme.Translucent.NoTitleBar"
android:label="@string/facebook_app_name" />
<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/>
</application>
</manifest>
You have done from facebook project module and now move to your main project. Go to file -> project structure -> dependency -> add facebook.
Now open your layout file and add a button for facbook login and assign id name "bt_facebook" than use below code in your activity for Facebook login and user details:-
package com.exampe.facebooklogin; //your project name
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.facebook.AccessToken;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.GraphRequest;
import com.facebook.GraphResponse;
import com.facebook.Profile;
import com.facebook.login.LoginManager;
import com.facebook.login.LoginResult;
import java.util.Arrays;
public class FacebookLogin extends ActionBarActivity {
//For facebook
private CallbackManager callbackManager;
private Button facebook_button;
ProgressDialog progress;
private String facebook_id,f_name, m_name, l_name, gender, profile_image, full_name, email_id;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {
getSupportActionBar().hide();
}catch (NullPointerException e){
}
setContentView(R.layout.activity_facebook_login);
facebook_button=(Button)findViewById(R.id.bt_facebook);
progress=new ProgressDialog(FacebookLogin.this);
progress.setMessage(getResources().getString(R.string.please_wait_facebooklogin));
progress.setIndeterminate(false);
progress.setCancelable(false);
facebook_id=f_name= m_name= l_name= gender= profile_image= full_name= email_id="";
//for facebook
FacebookSdk.sdkInitialize(getApplicationContext());
callbackManager = CallbackManager.Factory.create();
//register callback object for facebook result
LoginManager.getInstance().registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
progress.show();
Profile profile = Profile.getCurrentProfile();
if (profile != null) {
facebook_id=profile.getId();
f_name=profile.getFirstName();
m_name=profile.getMiddleName();
l_name=profile.getLastName();
full_name=profile.getName();
profile_image=profile.getProfilePictureUri(400, 400).toString();
}
//Toast.makeText(FacebookLogin.this,"Wait...",Toast.LENGTH_SHORT).show();
GraphRequest request = GraphRequest.newMeRequest(AccessToken.getCurrentAccessToken(),
new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object, GraphResponse response) {
try {
email_id=object.getString("email");
gender=object.getString("gender");
//Start new activity or use this info in your project.
Intent i=new Intent(FacebookLogin.this, LoginSuccess.class);
i.putExtra("type","facebook");
i.putExtra("facebook_id",facebook_id);
i.putExtra("f_name",f_name);
i.putExtra("m_name",m_name);
i.putExtra("l_name",l_name);
i.putExtra("full_name",full_name);
i.putExtra("profile_image",profile_image);
i.putExtra("email_id",email_id);
i.putExtra("gender",gender);
progress.dismiss();
startActivity(i);
finish();
} catch (JSONException e) {
// TODO Auto-generated catch block
// e.printStackTrace();
}
}
});
request.executeAsync();
}
@Override
public void onCancel() {
Toast.makeText(FacebookLogin.this,getResources().getString(R.string.login_canceled_facebooklogin),Toast.LENGTH_SHORT).show();
progress.dismiss();
}
@Override
public void onError(FacebookException error) {
Toast.makeText(FacebookLogin.this,getResources().getString(R.string.login_failed_facebooklogin),Toast.LENGTH_SHORT).show();
progress.dismiss();
}
});
//facebook button click
facebook_button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
LoginManager.getInstance().logInWithReadPermissions(FacebookLogin.this, Arrays.asList("public_profile", "user_friends", "email"));
}
});
}
//for facebook callback result.
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
}
}
In this post, I used custom button for login, you all can use official Facebook button. Don't forget to share this post. If you have any question regarding this post than feel free to comment.
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This post first appeared on Coders Hub: Android Code Examples And Programming Tutorials, please read the originial post: here
