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Samebug tips

  1. ,
    via Stack Overflow by Razgriz

    Happens when you make a network call on the main UI thread of the Android application which results in a UI freeze until the network call is complete and the response is received. Instead, execute the network calls in the background: use AsyncTask.

  2. ,

    An alternative for just getting rid of the Exception is use StrictMode.ThreadPolicy to force execute on main thread.

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

Solutions on the web

via Stack Overflow by suannai
, 2 years ago
This exception has no message.
via Stack Overflow by aTa
, 2 years ago
This exception has no message.
via Stack Overflow by Ruben Pizarro
, 2 years ago
via Stack Overflow by user2048724
, 2 years ago
android.os.NetworkOnMainThreadException: 	at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1147)	at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:110)	at libcore.io.IoBridge.connectErrno(IoBridge.java:137)	at libcore.io.IoBridge.connect(IoBridge.java:122)	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:183)	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:163)	at java.net.Socket.startupSocket(Socket.java:590)	at java.net.Socket.tryAllAddresses(Socket.java:128)	at java.net.Socket.(Socket.java:178)	at java.net.Socket.(Socket.java:150)	at com.example.seth.chat4all.MainActivity$2.onClick(MainActivity.java:83)	at android.view.View.performClick(View.java:4789)	at android.view.View$PerformClick.run(View.java:19881)	at android.os.Handler.handleCallback(Handler.java:739)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:135)	at android.app.ActivityThread.main(ActivityThread.java:5294)	at java.lang.reflect.Method.invoke(Native Method)	at java.lang.reflect.Method.invoke(Method.java:372)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)