[Android] FaceBook sdk 登入app

1. 下載Facebook sdk：http://goo.gl/nXEtDY

2. Creat a new app：https://developers.facebook.com/

3. 將你剛剛下載的sdk解壓縮，import existing code 到eclipse

4. 建立你的App project，他會給你一個APP-ID

5. 在project上點右鍵 -> Properties -> Android -> Add(在下方) -> 加入Facebook-sdk

6. 產生HashKey：先打開你的CMD，cd到你的java-jdk目錄，找到/bin
    參考(我的Mac路徑)：
    /Library/Java/JavaVirtualMachines/jdk1.7.0_60.jdk/Contents/Home/bin
  enter之後再貼上

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1 2	keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore | openssl sha1 -binary | openssl base64

  再按一次enter過後他會叫你輸入密碼，不要理他再按一次enter就好
    你會看到產生一行密碼，這就是hashkey

7. 回到你剛剛在fb申請的那個APP頁面，按Settings -> basic -> Add Platform -> Android
會看到這個，把剛剛產生的hashkey貼到KeyHashes欄位，Single sign on打開

8. 開始寫project囉

在Manifest.xml插入這行

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1 2	<uses-permission android:name="android.permission.INTERNET"/>

接著修改Avtivity

我的範例是讓他一進來就要登入，所以我放在MainActivity

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package com.example.photothrow; import android.os.Bundle; import android.app.Activity; import com.facebook.android.*; import com.facebook.android.Facebook.*; public class MainActivity extends Activity {     private Facebook facebook = new Facebook("你的App-ID");     /** Called when the activity is first created. */     @SuppressWarnings("deprecation")     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         facebook.authorize( this, new DialogListener(){             @Override             public void onComplete(Bundle values) {             // TODO Auto-generated method stub             }             @Override             public void onFacebookError(FacebookError e) {             // TODO Auto-generated method stub             }             @Override             public void onError(DialogError e) {             // TODO Auto-generated method stub             }             @Override             public void onCancel() {             // TODO Auto-generated method stub             }         });     } }

修改這行

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1	private Facebook facebook = new Facebook("你的App-ID");

就可以run囉！