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Android面试题精选——再聊Android-Handler机制，深入解析android核心组件和应用框架
throw new RuntimeException(“Only one Looper may be created per thread”); } sThreadLocal.set(new Looper(quitAllowed)); } //获取当前线程的Looper对象 public static @Nullable Looper myLooper() { return sThreadLocal.get(); } 这里有一个很关键的类：ThreadLocal，Android面试题精选——再聊Android-Handler机制-2，Android组件化开发教程
//创建当前线程的Looper对象 private static void prepare(boolean quitAllowed) { if (sThreadLocal.get() != null) { throw new RuntimeException(“Only one Looper may be created per thread”); } sThreadLocal.set(new Looper(quitAllowed)); } //获取当前线程的Loop