java.lang.IllegalArgumentException：注销时出现无效的上下文参数错误

Question

我创建了一个简单的应用程序，它使用Facebook登录和注销。登录时没问题，但注销时应用程序已停止。有没有解决方案？

这里是我的代码

活动

public class Login extends Activity implements OnClickListener { 

    ImageView pic, button; 
    Facebook fb; 
    SharedPreferences sp; 
    TextView welcome; 

    @SuppressWarnings("deprecation") 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_login); 

     String APP_ID = getString(R.string.app_id); 
     fb = new Facebook(APP_ID); 

     sp = getPreferences(MODE_PRIVATE); 
     String access_token = sp.getString("access_token",null); 
     long expires = sp.getLong("access_expires", 0); 

     if(access_token != null){ 
      fb.setAccessToken(access_token); 
     } 
     if(expires != 0){ 
      fb.setAccessExpires(expires); 
     } 

     welcome = (TextView) findViewById(R.id.welcome); 


     StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); 
     StrictMode.setThreadPolicy(policy); 


     button = (ImageView)findViewById(R.id.login); 
     pic = (ImageView)findViewById(R.id.picture_pic); 
     button.setOnClickListener(this); 

     updateButtonImage(); 

    } 

    @SuppressWarnings("deprecation") 
    private void updateButtonImage() { 
     if (fb.isSessionValid()){ 
      button.setImageResource(R.drawable.logout_button); 
      pic.setVisibility(ImageView.VISIBLE); 

      JSONObject obj = null; 
//   URL img_url = null; 

      try { 
       String jsonUser = fb.request("me"); 
       obj = Util.parseJson(jsonUser); 

       String id = obj.optString("id"); 
       String name = obj.optString("name"); 

       welcome.setText("Welcome, " + name + " Your id is " + id); 

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


     }else{ 
      button.setImageResource(R.drawable.login_button); 
      pic.setVisibility(ImageView.INVISIBLE); 


     } 
    } 

    @SuppressWarnings("deprecation") 
    @Override 
    public void onClick(View v) { 
     // logout from facebook 
       if(fb.isSessionValid()){ 

        try { 
         fb.logout(Login.this); 
         updateButtonImage(); 
         welcome.setText("Please Login !"); 


        } catch (MalformedURLException e) { 

         e.printStackTrace(); 
        } catch (IOException e) { 

         e.printStackTrace(); 
        } 
       }else{ 
        //login to facebook    
       fb.authorize(Login.this, new String[] {"email"} ,new DialogListener(){ 

        @Override 
        public void onComplete(Bundle values) { 
         Editor editor = sp.edit(); 
         editor.putString("access_token", fb.getAccessToken()); 
         editor.putLong("access_expires", fb.getAccessExpires()); 
         editor.commit(); 

         updateButtonImage(); 

       //  Intent intent = new Intent (Login.this,Home.class); 
       //  startActivity(intent); 
       //  finish(); 
        } 

        @Override 
        public void onFacebookError(FacebookError e) { 
         Toast.makeText(Login.this, "onFBError", Toast.LENGTH_SHORT).show(); 
        } 

        @Override 
        public void onError(DialogError e) { 
         Toast.makeText(Login.this, "onError", Toast.LENGTH_SHORT).show(); 
        } 

        @Override 
        public void onCancel() { 
         Toast.makeText(Login.this, "onCancel", Toast.LENGTH_SHORT).show(); 
        } 

       }); 
       } 
    } 
    @SuppressWarnings("deprecation") 
    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 

     super.onActivityResult(requestCode, resultCode, data); 

     fb.authorizeCallback(requestCode, resultCode, data); 

    } 


} 

这是logcat的

> 03-28 07:27:37.379: W/dalvikvm(4094): threadid=1: thread exiting with 
> uncaught exception (group=0xa62df288) 03-28 07:27:37.383: 
> E/AndroidRuntime(4094): FATAL EXCEPTION: main 03-28 07:27:37.383: 
> E/AndroidRuntime(4094): java.lang.IllegalArgumentException: Invalid 
> context argument 03-28 07:27:37.383: E/AndroidRuntime(4094): at 
> android.webkit.CookieSyncManager.createInstance(CookieSyncManager.java:86) 
> 03-28 07:27:37.383: E/AndroidRuntime(4094): at 
> com.facebook.internal.Utility.clearCookiesForDomain(Utility.java:255) 
> 03-28 07:27:37.383: E/AndroidRuntime(4094): at 
> com.facebook.internal.Utility.clearFacebookCookies(Utility.java:279) 
> 03-28 07:27:37.383: E/AndroidRuntime(4094): at 
> com.facebook.Session.closeAndClearTokenInformation(Session.java:593) 
> 03-28 07:27:37.383: E/AndroidRuntime(4094): at 
> com.facebook.android.Facebook.logoutImpl(Facebook.java:667) 03-28 
> 07:27:37.383: E/AndroidRuntime(4094):  at 
> com.facebook.android.Facebook.logout(Facebook.java:644) 03-28 
> 07:27:37.383: E/AndroidRuntime(4094):  at 
> com.innoark.motivator.Login.onClick(Login.java:118) 03-28 
> 07:27:37.383: E/AndroidRuntime(4094):  at 
> android.view.View.performClick(View.java:4084) 03-28 07:27:37.383: 
> E/AndroidRuntime(4094): at 
> android.view.View$PerformClick.run(View.java:16966) 03-28 
> 07:27:37.383: E/AndroidRuntime(4094):  at 
> android.os.Handler.handleCallback(Handler.java:615) 03-28 
> 07:27:37.383: E/AndroidRuntime(4094):  at 
> android.os.Handler.dispatchMessage(Handler.java:92) 03-28 
> 07:27:37.383: E/AndroidRuntime(4094):  at 
> android.os.Looper.loop(Looper.java:137) 03-28 07:27:37.383: 
> E/AndroidRuntime(4094): at 
> android.app.ActivityThread.main(ActivityThread.java:4745) 03-28 
> 07:27:37.383: E/AndroidRuntime(4094):  at 
> java.lang.reflect.Method.invokeNative(Native Method) 03-28 
> 07:27:37.383: E/AndroidRuntime(4094):  at 
> java.lang.reflect.Method.invoke(Method.java:511) 03-28 07:27:37.383: 
> E/AndroidRuntime(4094): at 
> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
> 03-28 07:27:37.383: E/AndroidRuntime(4094): at 
> com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 03-28 
> 07:27:37.383: E/AndroidRuntime(4094):  at 
> dalvik.system.NativeStart.main(Native Method) 

在此先感谢错误报告。

Answer 1

我在旧应用程序中遇到了此错误，该应用程序仍在使用此问题中使用的现已弃用的注销方法。我选择修补SDK来快速修复，而不是升级，因为时间不够。

由于堆栈跟踪表明，问题是，在这条线，传递给CookieSyncManager上下文参数为null：

android.webkit.CookieSyncManager.createInstance(CookieSyncManager.java:86)

如果你走的更远的堆栈，你可以看到上下文传入的参数是Facebook SDK中Session类的staticContext成员变量。无论出于何种原因，他们都将此变量设置为null，因此当调用logout时，应用程序会因此异常而崩溃。

为了解决这个问题，我编辑了Session类，使initializeStaticContext成为公共方法。然后，只需调用您调用注销之前：

Session.initializeStaticContext(this.getApplicationContext()); 
fb.logout(Login.this); 

当然，这不是最好的解决办法，但它能够完成任务。

Answer 2

https://developers.facebook.com/bugs/547340878743830/的解决方法是导致此问题的方法是创建com.facebook.Door类，以便能够调用Session.initializeStaticContext（），并在调用注销之前调用其方法。

package com.facebook; 

import android.content.Context; 

public class Door { 
    public static void initializeStaticContext(Context context) { 
    Session.initializeStaticContext(context); 
    } 
}