1、首先是要先下载FaceBook SDK Android 版；
2、导入FaceBookSDK 作为Library 引入到自己的项目中
3、在FaceBook 注册一个 测试应用
4、配置AndroidManifest.xml：
<activity android:name="com.facebook.LoginActivity"/><meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/app_id"/> 在String 中添加：
<string name="app_id">1548440642074664</string>5、添加 Facebook 登录按钮 ：
<com.facebook.widget.LoginButtonandroid:id="@+id/login_button"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center_horizontal"android:layout_marginBottom="30dp"android:layout_marginTop="30dp" />6、在activity中添加代码：
public class MainActivity extends Activity {private static final String TAG = "MainActivity";private UiLifecycleHelper uiHelper;private Session.StatusCallback callback = new Session.StatusCallback() {@Overridepublic void call(Session session, SessionState state,Exception exception) {onSessionStateChange(session, state, exception);}};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);uiHelper = new UiLifecycleHelper(MainActivity.this, callback);uiHelper.onCreate(savedInstanceState);setContentView(R.layout.activity_main);LoginButton authButton = (LoginButton) findViewById(R.id.login_button);authButton.setReadPermissions(Arrays.asList("email","user_likes", "user_status"));}private void onSessionStateChange(Session session, SessionState state,Exception exception) {if (state.isOpened()) {Log.i(TAG, "Logged in…");} else if (state.isClosed()) {Log.i(TAG, "Logged out…");}}@Overridepublic void onResume() {super.onResume();// For scenarios where the main activity is launched and user// session is not null, the session state change notification// may not be triggered. Trigger it if it's open/closed.Session session = Session.getActiveSession();if (session != null && (session.isOpened() || session.isClosed())) {onSessionStateChange(session, session.getState(), null);}uiHelper.onResume();}@Overridepublic void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);uiHelper.onActivityResult(requestCode, resultCode, data);}@Overridepublic void onPause() {super.onPause();uiHelper.onPause();}@Overridepublic void onDestroy() {super.onDestroy();uiHelper.onDestroy();}@Overridepublic void onSaveInstanceState(Bundle outState) {super.onSaveInstanceState(outState);uiHelper.onSaveInstanceState(outState);}}如果想得到用户的基本信息：
private void getUserInfo() {String fqlQuery = "SELECT uid,name,email FROM user WHERE uid = me()";Bundle params = new Bundle();params.putString("q", fqlQuery);Request request = new Request(Session.getActiveSession(),"/me",params,HttpMethod.GET,new Request.Callback(){public void onCompleted(Response response) {String str = response.toString();Log.i(TAG, str);}});Request.executeBatchAsync(request);}
，什么天荒地老，什么至死不渝。都只是锦上添花的借口…
