android.os.NetworkOnMainThreadException in facebook wall post

问题

I'm using Android facebook SDK for post on facebook wall.I have used following code for wall post but every time through exception android.os.NetworkOnMainThreadException

public void postToWall(String message) {
        Bundle parameters = new Bundle();
        parameters.putString("message", message);
        parameters.putString("description", "topic share");
        try {
            facebook.request("me");//Error here
            String response = facebook.request("me/feed", parameters, "POST");
            Log.d("Tests", "got response: " + response);
            if (response == null || response.equals("")
                    || response.equals("false")) {
                showToast("Blank response.");
            } else {
                showToast("Message posted to your facebook wall!");
            }
            finish();
        } catch (Exception e) {
            showToast("Failed to post to wall!");
            e.printStackTrace();
            finish();
        }
    }

Logcat

android.os.NetworkOnMainThreadException
W/System.err( 1048):    at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
W/System.err( 1048):    at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
W/System.err( 1048):    at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
W/System.err( 1048):    at java.net.InetAddress.getAllByName(InetAddress.java:214)
W/System.err( 1048):    at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
W/System.err( 1048):    at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
W/System.err( 1048):    at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:341)
W/System.err( 1048):    at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
W/System.err( 1048):    at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
W/System.err( 1048):    at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
W/System.err( 1048):    at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.makeSslConnection(HttpsURLConnectionImpl.java:461)
W/System.err( 1048):    at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.connect(HttpsURLConnectionImpl.java:433)
W/System.err( 1048):    at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
W/System.err( 1048):    at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
W/System.err( 1048):    at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273)
W/System.err( 1048):    at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:168)
W/System.err( 1048):    at libcore.net.http.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:271)
W/System.err( 1048):    at com.facebook.android.Util.openUrl(Util.java:215)
W/System.err( 1048):    at com.facebook.android.Facebook.request(Facebook.java:776)
W/System.err( 1048):    at com.facebook.android.Facebook.request(Facebook.java:713)
W/System.err( 1048):    at com.example.share.Share.postToWall(Share.java:86)
W/System.err( 1048):    at com.example.share.Share.share(Share.java:72)
W/System.err( 1048):    at java.lang.reflect.Method.invokeNative(Native Method)
W/System.err( 1048):    at java.lang.reflect.Method.invoke(Method.java:511)
W/System.err( 1048):    at android.view.View$1.onClick(View.java:3586)
W/System.err( 1048):    at android.view.View.performClick(View.java:4084)
W/System.err( 1048):    at android.view.View$PerformClick.run(View.java:16966)
W/System.err( 1048):    at android.os.Handler.handleCallback(Handler.java:615)
W/System.err( 1048):    at android.os.Handler.dispatchMessage(Handler.java:92)
W/System.err( 1048):    at android.os.Looper.loop(Looper.java:137)
W/System.err( 1048):    at android.app.ActivityThread.main(ActivityThread.java:4745)
W/System.err( 1048):    at java.lang.reflect.Method.invokeNative(Native Method)
W/System.err( 1048):    at java.lang.reflect.Method.invoke(Method.java:511)
W/System.err( 1048):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
W/System.err( 1048):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
W/System.err( 1048):    at dalvik.system.NativeStart.main(Native Method)
W/WindowManager(  145): Failure taking screenshot for (246x410) to layer 21010
I/Choreographer( 1048): Skipped 40 frames!  The application may be doing too much work on its main thread.
D/dalvikvm(  226): GC_CONCURRENT freed 384K, 7% free 8535K/9095K, paused 20ms+4ms, total 52ms

回答1:

You cannot perform network IO on the UI thread on Honeycombe or later. Technically it is possible on earlier versions of Android, but is a really bad idea as it will cause your app to stop responding, and can result in the OS killing your app for being badly behaved. You'll need to run a background process or use AsyncTask to perform your network transaction on a background thread.

Edit : Another Idea but it is not good . It is Bad Practice to use it but some people use it.

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

Add above code in your activity class.

I personally Prefer the first option use thread or AsyncTask .

来源：https://stackoverflow.com/questions/12757416/android-os-networkonmainthreadexception-in-facebook-wall-post