How to fix android.os.NetworkOnMainThreadException?

How to fix android.os.NetworkOnMainThreadException

Put below code in Activity

@Overrideprotected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

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


// other oncrete stuff

}