Attempt to Reproduce Error From http://stackoverflow.com/q/30557528/115145

gistfile1.java

package com.commonsware.myapplication;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;


public class MainActivity extends Activity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    ExecutorService executorService = Executors.newFixedThreadPool(1);
    executorService.submit(new Runnable() {

      @Override
      public void run() {
        new OutgoingSync(MainActivity.this);

      }
    });
  }

  static class OutgoingSync {

    public OutgoingSync(Context context){

      Log.e("OutgoingSync thread", Thread.currentThread().getName()); // Output "pool-2,thread-1"
      doSomeStuff();
    }

    private void doSomeStuff() {
      new UploadPhotosToServer();
    }

  }

  static class UploadPhotosToServer {
    public UploadPhotosToServer() {
      Log.e("Upload photos thread", Thread.currentThread().getName()); // Output is "main"
// And the following network-related code throws a NetworkOnMainThreadException (because it is run on the main thread)
    }
  }
}