페이스북 간편 로그인

https://newgenerationkorea.wordpress.com/2015/07/20/android-studio-%EC%99%80-facebook-%EC%97%B0%EB%8F%99/

=> 페이스북 설정 참조

 

ㅇ hash key 가져오기(oncreate 함수 안에서)

try {
    PackageInfo info = getPackageManager().getPackageInfo(
            "com.test.facebooklogin", //-> 패키지명
            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 (PackageManager.NameNotFoundException e) {

} catch (NoSuchAlgorithmException e) {

}

 

ㅇ layout xml

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="180dip"
    android:gravity="center"
    android:orientation="vertical"
    android:layout_alignParentBottom="true">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="40dip"
        android:gravity="center"
        android:text="Facebook 으로 회원가입/로그인이 가능합니다"
        android:textColor="#000000"
        android:textSize="14dip" >
    </TextView>

    <com.facebook.login.widget.LoginButton
        android:id="@+id/connectWithFbButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:layout_gravity="center_horizontal"
        android:text="  connect_with_facebook" />

</LinearLayout>

 

ㅇ AndroidManifest.xml

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

- Application 태그 안에

<activity
    android:name="com.facebook.FacebookActivity"
    android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
    android:theme="@android:style/Theme.Translucent.NoTitleBar"
    android:label="@string/app_name" />

<meta-data
    android:name="com.facebook.sdk.ApplicationId"
    android:value="@string/facebook_app_id"/>

 

ㅇ strings.xml

<string name="facebook_app_id">생성된 앱 ID</string>

 

ㅇ Activity

private CallbackManager callbackManager;

String id="";
String name="";
String email="";

Context mContext;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    /**
     * You need to initialize Facebook SDK before you can use it.
     * Add a call to FacebookSdk.sdkInitialize from onCreate in Activity or Application:
     */
    FacebookSdk.sdkInitialize(getApplicationContext());

    setContentView(R.layout.activity_main);

    callbackManager = CallbackManager.Factory.create();

    LoginButton loginButton = (LoginButton) findViewById(R.id.connectWithFbButton);

    loginButton.setReadPermissions("email");         
    loginButton.registerCallback(callbackManager,

            new FacebookCallback<LoginResult>() {

                @Override
                public void onSuccess(LoginResult loginResult) { // 로그인이 성공되었을때 호출

                    GraphRequest request = GraphRequest.newMeRequest(

                            loginResult.getAccessToken(),

                            new GraphRequest.GraphJSONObjectCallback() {
                                @Override
                                public void onCompleted(JSONObject object, GraphResponse response) {
                                    // Application code

                                    try {

                                        id = (String) response.getJSONObject().get("id");//페이스북 아이디값
                                        name = (String) response.getJSONObject().get("name");//페이스북 이름
                                        email = (String) response.getJSONObject().get("email");//이메일

                                    } catch (JSONException e) {
                                        // TODO Auto-generated catch block
                                        e.printStackTrace();

                                    }



                                    // new joinTask().execute(); //자신의 서버에서 로그인 처리를 해줍니다

                                }
                            });

                    Bundle parameters = new Bundle();
                        parameters.putString("fields", "id,name,email,gender, birthday");

                    request.setParameters(parameters);
                    request.executeAsync();

                }

                @Override
                public void onCancel() {
                    Toast.makeText(MainActivity.this, "로그인을 취소 하였습니다!", Toast.LENGTH_SHORT).show();
                }

                @Override
                public void onError(FacebookException error) {
                    Toast.makeText(MainActivity.this, "에러가 발생하였습니다", Toast.LENGTH_SHORT).show();
                }
            });