Login Twitter to show the error "android.os.NetworkOnMainThreadException" [duplicate]

Question

I have develop one application.Now i am trying to integrate the twitter in my application.My problem is when i login the application it show "android.os.NetworkOnMainThreadException" "at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)".

Please any one help me thanks...

import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.auth.RequestToken;
import twitter4j.conf.ConfigurationBuilder;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class TwitterActivity extends Activity {
    static final String CONSUMER_KEY="my consumer key";
    static final String CONSUMER_SECRETKEY="my secret key";
    Button buttonLoginTwitter;
    SharedPreferences sharedpref;
    Twitter twitter;
    private static RequestToken requestToken;
    static final String TWITTER_CALLBACK_URL = "oauth://t4jsample";
    static final String ISTWITTERLOGIN="isTwitterLogedIn";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_twitter);
        buttonLoginTwitter=(Button)findViewById(R.id.btnidLogin);
        sharedpref=getApplicationContext().getSharedPreferences("mypreference", 0);
        TwitterLogin();
    }
    private void TwitterLogin() {
        buttonLoginTwitter.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {

                if(!istwitterLogin())
                {
                    ConfigurationBuilder builder = new ConfigurationBuilder();
                    builder.setOAuthConsumerKey(CONSUMER_KEY);
                    builder.setOAuthConsumerSecret(CONSUMER_SECRETKEY);
                    twitter4j.conf.Configuration configuration=builder.build();
                    TwitterFactory factory = new TwitterFactory(configuration);
                    twitter = factory.getInstance();

                        try {
                            requestToken = twitter
                                    .getOAuthRequestToken(TWITTER_CALLBACK_URL);
                            TwitterActivity.this.startActivity(new Intent(Intent.ACTION_VIEW, Uri
                                    .parse(requestToken.getAuthenticationURL())));
                        } catch (TwitterException e) {
                            e.printStackTrace();
                        }
                }
                else {
                    Toast.makeText(getApplicationContext(),"Already Logged into twitter", Toast.LENGTH_LONG).show();
                }
            }
        });
    }
    protected boolean istwitterLogin() {
        return sharedpref.getBoolean(ISTWITTERLOGIN, false);
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.twitter, menu);
        return true;
    }

}

When i trying to login i got this error:

  E/AndroidRuntime( 5946): FATAL EXCEPTION: main
E/AndroidRuntime( 5946): android.os.NetworkOnMainThreadException
E/AndroidRuntime( 5946):    at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
E/AndroidRuntime( 5946):    at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
E/AndroidRuntime( 5946):    at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
E/AndroidRuntime( 5946):    at java.net.InetAddress.getAllByName(InetAddress.java:214)
E/AndroidRuntime( 5946):    at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
E/AndroidRuntime( 5946):    at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
E/AndroidRuntime( 5946):    at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:341)
E/AndroidRuntime( 5946):    at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
E/AndroidRuntime( 5946):    at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
E/AndroidRuntime( 5946):    at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
E/AndroidRuntime( 5946):    at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
E/AndroidRuntime( 5946):    at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
E/AndroidRuntime( 5946):    at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
E/AndroidRuntime( 5946):    at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
E/AndroidRuntime( 5946):    at libcore.net.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:188)
E/AndroidRuntime( 5946):    at twitter4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:158)
E/AndroidRuntime( 5946):    at twitter4j.internal.http.HttpClientWrapper.request(HttpClientWrapper.java:65)
E/AndroidRuntime( 5946):    at twitter4j.internal.http.HttpClientWrapper.post(HttpClientWrapper.java:102)
E/AndroidRuntime( 5946):    at twitter4j.auth.OAuthAuthorization.getOAuthRequestToken(OAuthAuthorization.java:121)
E/AndroidRuntime( 5946):    at twitter4j.auth.OAuthAuthorization.getOAuthRequestToken(OAuthAuthorization.java:104)
E/AndroidRuntime( 5946):    at twitter4j.TwitterBaseImpl.getOAuthRequestToken(TwitterBaseImpl.java:276)
E/AndroidRuntime( 5946):    at com.androidhive.twitterconnect.MainActivity.loginToTwitter(MainActivity.java:236)
E/AndroidRuntime( 5946):    at com.androidhive.twitterconnect.MainActivity.access$1(MainActivity.java:223)
E/AndroidRuntime( 5946):    at com.androidhive.twitterconnect.MainActivity$1.onClick(MainActivity.java:123)
E/AndroidRuntime( 5946):    at android.view.View.performClick(View.java:4084)
E/AndroidRuntime( 5946):    at android.view.View$PerformClick.run(View.java:16966)
E/AndroidRuntime( 5946):    at android.os.Handler.handleCallback(Handler.java:615)
E/AndroidRuntime( 5946):    at android.os.Handler.dispatchMessage(Handler.java:92)
E/AndroidRuntime( 5946):    at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime( 5946):    at android.app.ActivityThread.main(ActivityThread.java:4745)
E/AndroidRuntime( 5946):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 5946):    at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime( 5946):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
E/AndroidRuntime( 5946):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
E/AndroidRuntime( 5946):    at dalvik.system.NativeStart.main(Native Method)
W/ActivityManager(  282):   Force finishing activity com.androidhive.twitterconnect/.MainActivity
D/mobiled--->listener(   76): [Client side (recv_cnt: 3671)]: Data is coming, go to check fd_set.
D/mobiled--->listener(   76): [Client side (recv_cnt: 3671)]: Find a socket with data, unlock and receive.
D/mobiled--->netlink_listener(   76): Going to decode uevent.

Answer 1

you have to check this onCreate() method:

if (android.os.Build.VERSION.SDK_INT > "YOur minimum SDK Version here") {
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
                .permitAll().build();
        StrictMode.setThreadPolicy(policy);
    }

And add permission to manifest..

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

Update

android.os.NetworkOnMainThreadException means you are performing your network operation on main thread which it will be blocked. So above solution is to restrict network error. But to overcome with this error you should use AsyncTask or by creating child thread and update your UI in runOnUiThread method which will update UI in that method.

Answer 2

Just add the following code in the oncreate off Activity:

 if (android.os.Build.VERSION.SDK_INT > 8) {
      StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
      StrictMode.setThreadPolicy(policy);
    }