facebook_login_api

//login page with facebook google ma facebook with developers search karvu
//doc ma click karvanu and facebool login ma jvanu
//android pr click karvanu and string ,manifest,ma ietle vastu add kre devani
//save kre ne and pkg name add kre ne save kre devu vedio ma joi ne
//How to Integrate Facebook Login with your Android Application youtube : https://www.youtube.com/watch?v=SrAXmZkOpJI
/facebook developer ma accout bnavvanu
Step 1:xml
step 2:java
step 3:string  //aama facebook ma developer opdion ma je string hoy ae j copy karve aa ma kbr pde ietle string lidhe che aa string copy karvi nai
step 4:manifest
step 5:graddle



Step 1:xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="16dp"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:paddingTop="16dp"
    tools:context="demoproject.aalap.com.loginfacebook.MainActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="50dp"
        android:text="Login_Status"
        android:id="@+id/textview"
        android:gravity="center"/>

<com.facebook.login.widget.LoginButton
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/fb_login_bn"
    android:layout_centerInParent="true"/>

</RelativeLayout>

Step 2:activity.java

public class MainActivity extends AppCompatActivity{
    LoginButton loginButton;
    TextView textView;
    CallbackManager callbackManager;


    private static final String TAG = "tag";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        FacebookSdk.sdkInitialize(getApplicationContext());
        setContentView(R.layout.activity_main);

        printHashKey(getApplicationContext());


        loginButton = findViewById(R.id.fb_login_bn);
        textView = findViewById(R.id.textview);
        callbackManager = CallbackManager.Factory.create();
        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {
                textView.setText("login sucess\n"+
                "\n"+loginResult.getAccessToken().getUserId()+
                "\n"+loginResult.getAccessToken().getToken());

            }

            @Override
            public void onCancel() {
                textView.setText("login cancel");

            }

            @Override
            public void onError(FacebookException error) {

            }
        });

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        callbackManager.onActivityResult(requestCode,resultCode,data);
    }

    // }


        public void printHashKey(Context pContext) {
            try {
                PackageInfo info = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_SIGNATURES);
                for (Signature signature : info.signatures) {
                    MessageDigest md = MessageDigest.getInstance("SHA");
                    md.update(signature.toByteArray());
                    String hashKey = new String(Base64.encode(md.digest(), 0));
                    Log.i(TAG, "printHashKey() Hash Key: " + hashKey);
                }
            } catch (NoSuchAlgorithmException e) {
                Log.e(TAG, "printHashKey()", e);
            } catch (Exception e) {
                Log.e(TAG, "printHashKey()", e);
            }

            }
    }

Step 3:String.xml

<resources>
    <string name="app_name">loginfacebook</string>
    <string name="facebook_app_id">2132764310268608</string>
    <string name="fb_login_protocol_scheme">fb2132764310268608</string>
</resources>

Step 4:Mainifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="demoproject.aalap.com.loginfacebook">

    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <meta-data android:name="com.facebook.sdk.ApplicationId"
            android:value="@string/facebook_app_id"/>
        <activity android:name="com.facebook.FacebookActivity"
            android:configChanges=
                "keyboard|keyboardHidden|screenLayout|screenSize|orientation"
            android:label="@string/app_name" />


    </application>

</manifest>

Step 5:graddle(module:app)

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.facebook.android:facebook-android-sdk:4.5.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

}