1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License 15 */ 16 17 package com.android.dialer.common.concurrent; 18 19 import android.os.Handler; 20 import android.os.Looper; 21 22 /** Application-wide utility methods for working with threads. */ 23 public class ThreadUtil { 24 private static volatile Handler mainThreadHandler; 25 26 /** Posts a runnable to the UI thread. */ postOnUiThread(Runnable runnable)27 public static void postOnUiThread(Runnable runnable) { 28 getUiThreadHandler().post(runnable); 29 } 30 31 /** Posts a runnable to the UI thread, to be run after the specified amount of time elapses. */ postDelayedOnUiThread(Runnable runnable, long delayMillis)32 public static void postDelayedOnUiThread(Runnable runnable, long delayMillis) { 33 getUiThreadHandler().postDelayed(runnable, delayMillis); 34 } 35 36 /** Gets a handler which uses the main looper. */ getUiThreadHandler()37 public static Handler getUiThreadHandler() { 38 if (mainThreadHandler == null) { 39 mainThreadHandler = new Handler(Looper.getMainLooper()); 40 } 41 return mainThreadHandler; 42 } 43 } 44