Java tutorial
//package com.java2s; /** * Copyright (c) 2015-present, Facebook, Inc. * All rights reserved. * * This source code is licensed under the BSD-style license found in the * LICENSE file in the root directory of this source tree. An additional grant * of patent rights can be found in the PATENTS file in the same directory. */ import android.os.Looper; public class Main { /** * @return {@code true} if the current thread is the UI thread. */ public static boolean isOnUiThread() { return Looper.getMainLooper().getThread() == Thread.currentThread(); } }