Question

我正在尝试在我的应用程序中发布用户墙而不显示提要对话框。我的活动包含EditText getmessage和Button with onClick()=postToWall。我正在关注这个问题： Android Facebook Post On Wall Without Dialog Warnings

这是我的代码：

public void postToWall(View v){
        String message = getmessage.getText().toString();
        postMessage(message);       
    }

    public void postMessage(String message){
        Log.d("test", "testing post to wall");
        try{
            String response;
            Bundle parameters = new Bundle();
            parameters.putString("message", message);           
            response = facebook.request("me/feed", parameters, "POST");

            Log.d("test", "got response "+response);

            if(response == null || response.equals("")){
                Log.v("Error", "Blank");
            }
        }
        catch(Exception e){
            e.printStackTrace();
        }
    }

以下是日志：

  06-06 20:03:19.726: I/ActivityManager(78): Displayed com.MyApp/.fbShare: +146ms
06-06 20:03:24.816: D/test(736): testing post to wall
06-06 20:03:24.828: W/System.err(736): android.os.NetworkOnMainThreadException
06-06 20:03:24.836: W/System.err(736):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
06-06 20:03:24.836: W/System.err(736):  at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
06-06 20:03:24.846: W/System.err(736):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
06-06 20:03:24.846: W/System.err(736):  at java.net.InetAddress.getAllByName(InetAddress.java:220)
06-06 20:03:24.846: W/System.err(736):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:71)
06-06 20:03:24.846: W/System.err(736):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
06-06 20:03:24.846: W/System.err(736):  at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351)
06-06 20:03:24.846: W/System.err(736):  at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86)
06-06 20:03:24.846: W/System.err(736):  at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
06-06 20:03:24.846: W/System.err(736):  at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308)
06-06 20:03:24.846: W/System.err(736):  at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.makeSslConnection(HttpsURLConnectionImpl.java:460)
06-06 20:03:24.846: W/System.err(736):  at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.connect(HttpsURLConnectionImpl.java:432)
06-06 20:03:24.846: W/System.err(736):  at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282)
06-06 20:03:24.856: W/System.err(736):  at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232)
06-06 20:03:24.856: W/System.err(736):  at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
06-06 20:03:24.856: W/System.err(736):  at libcore.net.http.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:164)
06-06 20:03:24.856: W/System.err(736):  at com.facebook.android.Util.openUrl(Util.java:193)
06-06 20:03:24.866: W/System.err(736):  at com.facebook.android.Facebook.request(Facebook.java:751)
06-06 20:03:24.866: W/System.err(736):  at com.MyApp.fbShare.postMessage(fbShare.java:56)
06-06 20:03:24.866: W/System.err(736):  at com.MyApp.fbShare.postToWall(fbShare.java:47)
06-06 20:03:24.866: W/System.err(736):  at java.lang.reflect.Method.invokeNative(Native Method)
06-06 20:03:24.866: W/System.err(736):  at java.lang.reflect.Method.invoke(Method.java:511)
06-06 20:03:24.876: W/System.err(736):  at android.view.View$1.onClick(View.java:3039)
06-06 20:03:24.876: W/System.err(736):  at android.view.View.performClick(View.java:3511)
06-06 20:03:24.876: W/System.err(736):  at android.view.View$PerformClick.run(View.java:14105)
06-06 20:03:24.876: W/System.err(736):  at android.os.Handler.handleCallback(Handler.java:605)
06-06 20:03:24.886: W/System.err(736):  at android.os.Handler.dispatchMessage(Handler.java:92)
06-06 20:03:24.886: W/System.err(736):  at android.os.Looper.loop(Looper.java:137)
06-06 20:03:24.886: W/System.err(736):  at android.app.ActivityThread.main(ActivityThread.java:4424)
06-06 20:03:24.886: W/System.err(736):  at java.lang.reflect.Method.invokeNative(Native Method)
06-06 20:03:24.896: W/System.err(736):  at java.lang.reflect.Method.invoke(Method.java:511)
06-06 20:03:24.896: W/System.err(736):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
06-06 20:03:24.896: W/System.err(736):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
06-06 20:03:24.896: W/System.err(736):  at dalvik.system.NativeStart.main(Native Method)

我在这里遗漏了什么吗？我很感激任何帮助。谢谢！

Answer 1

从3.0开始（我认为）如果您尝试在Main（UI）线程上使用网络，系统会抛出异常。他们选择让系统执行此操作以鼓励开发人员不要在主线程上放置长时间运行的任务（例如网络操作）。

为了解决您的问题，您需要将网络操作（例如调用postMessage（））移动到后台线程。有几种方法。查看AsyncTask或使用Handler / Thread进行查看。如果您搜索“Android create background threads”

之类的内容，可以在线找到许多示例

同样this tutorial made by Lars Vogel对于了解这些内容非常棒。

在没有Feed对话框的情况下发布到“NetworkOnMainThreadexception”| Android的

1 个答案: