Android中的Facebook发布错误

Question

我有一个问题，我在Facebook上发布了一条字符串消息，但是在发布时却遇到了一些错误，我不知道为什么，因为相同的代码正在不同的项目中运行。 请帮助我。

错误堆栈：

10-19 11:40:43.065: ERROR/AndroidRuntime(7466): FATAL EXCEPTION: main
10-19 11:40:43.065: ERROR/AndroidRuntime(7466): java.lang.NullPointerException
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at com.halosys.TvAnyTime.VideoPlayer$7.onClick(VideoPlayer.java:304)
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at android.view.View.performClick(View.java:2408)
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at android.view.View$PerformClick.run(View.java:8818)
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at android.os.Handler.handleCallback(Handler.java:587)
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at android.os.Handler.dispatchMessage(Handler.java:92)
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at android.os.Looper.loop(Looper.java:123)
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at android.app.ActivityThread.main(ActivityThread.java:4627)
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at java.lang.reflect.Method.invokeNative(Native Method)
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at java.lang.reflect.Method.invoke(Method.java:521)
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at dalvik.system.NativeStart.main(Native Method)

新代码：

// Bundle参数= new Bundle（）; 字符串str_post = null; if（rating.equals（“”））{str_post =“ TV Anytime允许您免费在iPhone，iPad或PC上观看喜爱的节目和电影，而无需网络。TVAnytime是第一个免费的流式视频DVR，适用于您的iPhone，iPad或PC。\\ n“ + name +”刚刚通过TvAnytime在iPhone上观看了“ + MovieName +”！\\ n“ + ed_Post.getText（）。toString（）+”“; } else {str_post =“ TV Anytime可以让您免费在iPhone，iPad或PC上观看喜爱的节目和电影，而无需网络。TVAnytime是iPhone，iPad或PC上第一个免费的流式视频DVR。\\ n“ + name +”刚刚用TvAnytime在iPhone上观看了“ + MovieName +”！\\ n“ + ed_Post.getText（）。toString（）+” \\ n评级“ + rating +”（满分5分）； } //parameters.putString("message“，str_post）; //IntroFaceBookScreen.mFacebook.authorize(VideoPlayer.this，new String [] {“ publish_stream”，“ read_stream”，“ offline_access”}，IntroFaceBookScreen.mFacebook.FORCE_DIALOG_AUTH，new FacebookDialogListener（VideoPlayer.this））; / *字符串响应= null; 尝试{response = mFacebook.request（“ me”）; } catch（MalformedURLException e）{// TODO自动生成的catch块e.printStackTrace（）; } catch（IOException e）{// TODO自动生成的catch块e.printStackTrace（）; } Bundle参数= new Bundle（）; parameters.putString（“ message”，str_post）; //发布图片代码

                    Bitmap bm = BitmapFactory.decodeFile("/sdcard/showIcon/show_S00275.png");
                    ByteArrayOutputStream baos = new ByteArrayOutputStream();  
                    bm.compress(Bitmap.CompressFormat.PNG, 100, baos); //bm is the bitmap object   
                    byte[] imgData = baos.toByteArray(); 


                    parameters.putByteArray("picture", imgData);




                    parameters.putString("description", "test test test");
                    try {

                        response = mFacebook.request("me/feed", parameters, "POST");
                    } catch (FileNotFoundException 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();
                    }
                    Log.d("Tests", "got response: " + response);
                    if (response == null || response.equals("") || 
                            response.equals("false")) {
                       Log.v("Error", "Blank response");
                    }*/
                    post_to_wall(str_post);
                    /* mFacebook.dialog(VideoPlayer.this, "feed",
                                new SampleDialogListener());*/
                    dismissDialog(0);
                }
            });

        btn_Cancel.setOnClickListener(new View.OnClickListener() {

            public void onClick(View arg0) {

                removeDialog(0);
            }
        });

        break;
}
return dialog;

} protected void post_to_wall（String str_post）{

 try{
      Bitmap bm = BitmapFactory.decodeFile("/sdcard/showIcon/show_S00275.png");
      ByteArrayOutputStream baos = new ByteArrayOutputStream();  
      bm.compress(Bitmap.CompressFormat.PNG, 100, baos); //bm is the bitmap object   
      byte[] imgData = baos.toByteArray(); 
      Bundle parameters = new Bundle();
      parameters.putString("message", "Test Post in Facebook Wal");
      parameters.putString("description", str_post);
      parameters.putByteArray("picture", imgData);
      String  response = mFacebook.request("me/feed",parameters,"POST");       
      Log.v("response", response);
   }
   catch(Exception e){
       System.out.println("The error Message = "+e);
   }

}

Answer 1

10-19 11:40:43.065: ERROR/AndroidRuntime(7466): java.lang.NullPointerException
10-19 11:40:43.065: ERROR/AndroidRuntime(7466):     at com.halosys.TvAnyTime.VideoPlayer$7.onClick(VideoPlayer.java:304)

在Logcat中，空指针出现在行号：304中。

因此，请检查由于墙上张贴或将位图转换为byteArray导致的错误 。

尝试像这样在Facebook墙上发布Call a Method并传递必要的参数，例如：

post_on_wall(decription); 

将参数传递给方法，简单地将代码传递给您，即可为您提供外观：

 post_on_wall(String desc) {
    try{
      Bundle parameters = new Bundle();
      parameters.putString("message", "Test Post in Facebook Wal");
      parameters.putString("description", desc);
      String  response = facebook.request("me/feed",parameters,"POST");       
      Log.v("response", response);
   }
   catch(Exception e){}
 }

有关在Facebook墙上张贴的更多示例，请检查在墙上张贴