1 /* 2 * Copyright (C) 2014 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.camera.async; 18 19 import android.os.Handler; 20 import android.os.HandlerThread; 21 22 /** 23 * Creates new handlers backed by threads with a specified lifetime. 24 */ 25 public class HandlerFactory { 26 /** 27 * @param lifetime The lifetime of the associated handler's thread. 28 * @param threadName The name to assign to the created thread. 29 * @return A handler backed by a new thread. 30 */ 31 public Handler create(Lifetime lifetime, String threadName) { 32 final HandlerThread thread = new HandlerThread(threadName); 33 thread.start(); 34 35 lifetime.add(new SafeCloseable() { 36 @Override 37 public void close() { 38 thread.quitSafely(); 39 } 40 }); 41 42 return new Handler(thread.getLooper()); 43 } 44 45 /** 46 * @param lifetime The lifetime of the associated handler's thread. 47 * @param threadName The name to assign to the created thread. 48 * @param javaThreadPriority The Java thread priority to use for this thread. 49 * @return A handler backed by a new thread. 50 */ 51 public Handler create(Lifetime lifetime, String threadName, int javaThreadPriority) { 52 final HandlerThread thread = new HandlerThread(threadName); 53 thread.start(); 54 thread.setPriority(javaThreadPriority); 55 56 lifetime.add(new SafeCloseable() { 57 @Override 58 public void close() { 59 thread.quitSafely(); 60 } 61 }); 62 63 return new Handler(thread.getLooper()); 64 } 65 } 66
