主要讨论在Android应用程序中进程和线程是怎样工作的。-In this paper, the Android application process and thread is how to work.

Android 4.4 Kitkat 音频实现及简要分析，音频录音，放音的设置，如何调试等。如何设置播放声音。-Android 4.4 Kitkat audio implementation and brief analysis, audio recording, playback settings, how to debug and so on. How to set the playback sound.