线程池

ThreadPoolExecutor

关于线程池的使用阿里的开发建议
http://www.wanandroid.com/blogimgs/a2609aed-1000-4039-93c3-7541aaa2013b.pdf

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在Android代码中使用ThreadPoolExecutor

https://blog.mindorks.com/threadpoolexecutor-in-android-8e9d22330ee3

int availableProcessors = Runtime.getRuntime().availableProcessors();