1 /* 2 * Copyright (C) 2016 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.systemui.util; 18 19 import android.os.Looper; 20 21 /** 22 * Helper providing common assertions. 23 */ 24 public class Assert { 25 isMainThread()26 public static void isMainThread() { 27 if (!Looper.getMainLooper().isCurrentThread()) { 28 throw new IllegalStateException("should be called from the main thread."); 29 } 30 } 31 isNotMainThread()32 public static void isNotMainThread() { 33 if (Looper.getMainLooper().isCurrentThread()) { 34 throw new IllegalStateException("should not be called from the main thread."); 35 } 36 } 37 } 38