android如何在手機中安裝facebook應用程序

Question

我想從我的應用程序中打開Facebook應用程序。如果安裝了，我想打開Facebook應用程序窗口，而不是Facebook的彈出窗口。

我該怎麼做？

Answer 1

它出現在Facebook Android SDK中。當您需要繼續使用FB登錄時，SDK會打開FB應用程序，而不是如果安裝了彈出警報。

這裏的（從Facebook SDK code）

/* 
    * Copyright 2010 Facebook, Inc. 
    * 
    * Licensed under the Apache License, Version 2.0 (the "License"); 
    * you may not use this file except in compliance with the License. 
    * You may obtain a copy of the License at 
    * 
    * http://www.apache.org/licenses/LICENSE-2.0 
    * 
    * Unless required by applicable law or agreed to in writing, software 
    * distributed under the License is distributed on an "AS IS" BASIS, 
    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
    * See the License for the specific language governing permissions and 
    * limitations under the License. 
    */ 
public class Facebook { 
... 

     /** 
     * Internal method to handle single sign-on backend for authorize(). 
     */ 
      private boolean startSingleSignOn(Activity activity, String applicationId, 
        String[] permissions, int activityCode) { 
       boolean didSucceed = true; 
       Intent intent = new Intent(); 

       intent.setClassName("com.facebook.katana", 
         "com.facebook.katana.ProxyAuth"); 
       intent.putExtra("client_id", applicationId); 
       if (permissions.length > 0) { 
        intent.putExtra("scope", TextUtils.join(",", permissions)); 
       } 

       // Verify that the application whose package name is 
       // com.facebook.katana.ProxyAuth 
       // has the expected FB app signature. 
       if (!validateAppSignatureForIntent(activity, intent)) { 
        return false; 
       } 

       mAuthActivity = activity; 
       mAuthPermissions = permissions; 
       mAuthActivityCode = activityCode; 
       try { 
        activity.startActivityForResult(intent, activityCode); 
       } catch (ActivityNotFoundException e) { 
        didSucceed = false; 
       } 

       return didSucceed; 
      } 
... 
}