สร้างปุ่ม Facebook Login บน Android

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cd path/to/android-sdk-install/platform-tools/
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adb install %HOMEPATH%\facebook-android-sdk-3.8\bin\FBAndroid-7.0.0.apk

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cd path/to/android-sdk-install/platform-tools/
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./adb install ~/facebook-android-sdk-3.8/bin/FBAndroid-7.0.0.apk

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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    xmlns:tools="http://schemas.android.com/tools"
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    android:layout_width="match_parent"
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    android:layout_height="match_parent"
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    android:orientation="vertical">
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    <com.facebook.widget.LoginButton
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        android:id="@+id/facebookLoginButton"
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        android:layout_width="wrap_content"
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        android:layout_height="wrap_content"
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        android:layout_gravity="center"
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        android:layout_marginTop="50dp" />
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</LinearLayout>

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

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

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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    package="com.devahoy.facebooksdk.login"
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    android:versionCode="1"
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    android:versionName="1.0" >
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    <uses-sdk
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        android:minSdkVersion="11"
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        android:targetSdkVersion="17" />
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    <uses-permission
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        android:name="android.permission.INTERNET" />
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    <application
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        android:allowBackup="true"
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        android:icon="@drawable/ic_launcher"
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        android:label="@string/app_name"
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        android:theme="@style/AppTheme" >
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        <activity
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            android:name="com.devahoy.facebooksdk.login.MainActivity"
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            android:label="@string/app_name" >
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            <intent-filter>
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                <action android:name="android.intent.action.MAIN" />
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                <category android:name="android.intent.category.LAUNCHER" />
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            </intent-filter>
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        </activity>
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        <meta-data
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            android:name="com.facebook.sdk.ApplicationId"
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            android:value="@string/app_id" />
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        <activity android:name="com.facebook.LoginActivity" />
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    </application>
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</manifest>

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private static String TAG = MainActivity.class.getSimpleName();

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private void onSessionStateChange(Session session, SessionState state, Exception exception) {
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    if (state.isOpened()) {
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        Log.i(TAG, "Logged in...");
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    } else if (state.isClosed()) {
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        Log.i(TAG, "Logged out...");
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    }
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}

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/**
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 * A placeholder fragment containing a simple view.
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 */
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public static class PlaceholderFragment extends Fragment {
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    private Session.StatusCallback callback = new Session.StatusCallback() {
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        @Override
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        public void call(Session session, SessionState state, Exception exception) {
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            onSessionStateChange(session, state, exception);
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        }
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    };
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...
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}

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private UiLifecycleHelper uiHelper;

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@Override
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public void onCreate(Bundle savedInstanceState) {
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    super.onCreate(savedInstanceState);
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    uiHelper = new UiLifecycleHelper(getActivity(), callback);
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    uiHelper.onCreate(savedInstanceState);
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}

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@Override
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public void onResume() {
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    super.onResume();
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    uiHelper.onResume();
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}
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@Override
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public void onActivityResult(int requestCode, int resultCode, Intent data) {
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    super.onActivityResult(requestCode, resultCode, data);
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    uiHelper.onActivityResult(requestCode, resultCode, data);
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}
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@Override
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public void onPause() {
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    super.onPause();
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    uiHelper.onPause();
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}
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@Override
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public void onDestroy() {
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    super.onDestroy();
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    uiHelper.onDestroy();
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}
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@Override
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public void onSaveInstanceState(Bundle outState) {
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    super.onSaveInstanceState(outState);
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    uiHelper.onSaveInstanceState(outState);
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}

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@Override
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public View onCreateView(LayoutInflater inflater, ViewGroup container,
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        Bundle savedInstanceState) {
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    View rootView = inflater.inflate(R.layout.fragment_main, container,
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            false);
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    LoginButton authButton = (LoginButton) rootView.findViewById(R.id.facebookLoginButton);
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    authButton.setFragment(this);
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    return rootView;
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}

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@Override
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public void onResume() {
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    super.onResume();
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    Session session = Session.getActiveSession();
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    if (session != null &&
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           (session.isOpened() || session.isClosed()) ) {
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        onSessionStateChange(session, session.getState(), null);
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    }
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    uiHelper.onResume();
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}

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keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore | openssl sha1 -binary | openssl base64

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keytool -exportcert -alias androiddebugkey -keystore %HOMEPATH%\.android\debug.keystore | openssl sha1 -binary | openssl base64

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private void onSessionStateChange(Session session, SessionState state, Exception exception) {
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    if (state.isOpened()) {
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        Request request = Request.newMeRequest(session, new GraphUserCallback() {
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            @Override
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            public void onCompleted(GraphUser user, Response response) {
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                Toast.makeText(getActivity(),
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                        "Hello " + user.getName(),
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                        Toast.LENGTH_LONG).show();
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            }
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        });
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        request.executeAsync();
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    } else if (state.isClosed()) {
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        Log.i(TAG, "Logged out...");
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    }
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}

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    <?xml version="1.0" encoding="utf-8"?>
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    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
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        package="com.devahoy.facebooksdk.login"
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        android:versionCode="1"
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        android:versionName="1.0" >
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        <uses-sdk
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            android:minSdkVersion="11"
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            android:targetSdkVersion="17" />
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       <uses-permission
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            android:name="android.permission.INTERNET" />
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        <application
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            android:allowBackup="true"
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            android:icon="@drawable/ic_launcher"
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            android:label="@string/app_name"
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            android:theme="@style/AppTheme" >
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            <activity
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                android:name="com.devahoy.facebooksdk.login.MainActivity"
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                android:label="@string/app_name" >
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                <intent-filter>
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                    <action android:name="android.intent.action.MAIN" />
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                    <category android:name="android.intent.category.LAUNCHER" />
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                </intent-filter>
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            </activity>
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            <meta-data
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                android:name="com.facebook.sdk.ApplicationId"
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                android:value="@string/app_id" />
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            <activity android:name="com.facebook.LoginActivity" />
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        </application>
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    </manifest>
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`fragment_main.xml`
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    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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        xmlns:tools="http://schemas.android.com/tools"
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        android:layout_width="match_parent"
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        android:layout_height="match_parent"
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        android:orientation="vertical">
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        <com.facebook.widget.LoginButton
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            android:id="@+id/facebookLoginButton"
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            android:layout_width="wrap_content"
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            android:layout_height="wrap_content"
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            android:layout_gravity="center"
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            android:layout_marginTop="50dp" />
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    </LinearLayout>

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package com.devahoy.facebooksdk.login;
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import android.content.Intent;
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import android.os.Bundle;
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import android.support.v4.app.Fragment;
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import android.support.v7.app.ActionBarActivity;
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import android.util.Log;
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import android.view.LayoutInflater;
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import android.view.Menu;
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import android.view.MenuItem;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.Toast;
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import com.facebook.Request;
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import com.facebook.Request.GraphUserCallback;
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import com.facebook.Response;
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import com.facebook.Session;
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import com.facebook.SessionState;
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import com.facebook.UiLifecycleHelper;
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import com.facebook.model.GraphUser;
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import com.facebook.widget.LoginButton;
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public class MainActivity extends ActionBarActivity {
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    private static String TAG = MainActivity.class.getSimpleName();
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    @Override
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    protected void onCreate(Bundle savedInstanceState) {
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        super.onCreate(savedInstanceState);
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        setContentView(R.layout.activity_main);
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        if (savedInstanceState == null) {
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            getSupportFragmentManager().beginTransaction()
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                    .add(R.id.container, new PlaceholderFragment()).commit();
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        }
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    }
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    @Override
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    public boolean onCreateOptionsMenu(Menu menu) {
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        // Inflate the menu; this adds items to the action bar if it is present.
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        getMenuInflater().inflate(R.menu.main, menu);
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        return true;
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    }
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    @Override
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    public boolean onOptionsItemSelected(MenuItem item) {
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        // Handle action bar item clicks here. The action bar will
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        // automatically handle clicks on the Home/Up button, so long
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        // as you specify a parent activity in AndroidManifest.xml.
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        int id = item.getItemId();
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        if (id == R.id.action_settings) {
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            return true;
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        }
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        return super.onOptionsItemSelected(item);
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    }
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    /**
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     * A placeholder fragment containing a simple view.
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     */
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    public static class PlaceholderFragment extends Fragment {
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        private UiLifecycleHelper uiHelper;
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        private Session.StatusCallback callback = new Session.StatusCallback() {
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            @Override
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            public void call(Session session, SessionState state, Exception exception) {
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                onSessionStateChange(session, state, exception);
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            }
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        };
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        public PlaceholderFragment() {
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        }
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        private void onSessionStateChange(Session session, SessionState state, Exception exception) {
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            if (state.isOpened()) {
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                Request request = Request.newMeRequest(session, new GraphUserCallback() {
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                    @Override
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                    public void onCompleted(GraphUser user, Response response) {
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                        Toast.makeText(getActivity(),
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                                "Hello " + user.getName(),
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                                Toast.LENGTH_LONG).show();
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                    }
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                });
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                request.executeAsync();
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            } else if (state.isClosed()) {
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                Log.i(TAG, "Logged out...");
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            }
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        }
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        @Override
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        public void onResume() {
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            super.onResume();
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            Session session = Session.getActiveSession();
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            if (session != null &&
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                   (session.isOpened() || session.isClosed()) ) {
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                onSessionStateChange(session, session.getState(), null);
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            }
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            uiHelper.onResume();
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        }
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        @Override
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        public void onActivityResult(int requestCode, int resultCode, Intent data) {
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            super.onActivityResult(requestCode, resultCode, data);
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            uiHelper.onActivityResult(requestCode, resultCode, data);
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        }
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        @Override
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        public void onPause() {
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            super.onPause();
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            uiHelper.onPause();
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        }
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        @Override
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        public void onDestroy() {
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            super.onDestroy();
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            uiHelper.onDestroy();
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        }
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        @Override
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        public void onSaveInstanceState(Bundle outState) {
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            super.onSaveInstanceState(outState);
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            uiHelper.onSaveInstanceState(outState);
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        }
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        @Override
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        public void onCreate(Bundle savedInstanceState) {
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            super.onCreate(savedInstanceState);
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            uiHelper = new UiLifecycleHelper(getActivity(), callback);
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            uiHelper.onCreate(savedInstanceState);
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        }
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        @Override
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        public View onCreateView(LayoutInflater inflater, ViewGroup container,
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                Bundle savedInstanceState) {
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            View rootView = inflater.inflate(R.layout.fragment_main, container,
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                    false);
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            LoginButton authButton = (LoginButton) rootView.findViewById(R.id.facebookLoginButton);
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            authButton.setFragment(this);
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            return rootView;
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        }
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    }
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}