android:
https://cwgoover.github.io/2016/10/09/android-adb-usage/ adb
https://developer.android.google.cn/guide/components/tasks-and-back-stack.html activity任务栈
https://blog.csdn.net/luoshengyang/article/details/8923485 罗升阳博客
http://grepcode.com/ android源码
https://blog.csdn.net/ttkatrina/article/details/50623043 android屏幕尺寸适配
http://blog.51cto.com/ticktick/1760191 android音频编程
https://blog.csdn.net/leixiaohua1020/article/details/15811977 ffmpeg