android，自己平时项目开发时记录的文档资料，含android开发众多知识点，希望帮助大家，欢迎指出错误-android, recording their usual documentation of project development, including the development of many knowledge points android, want to help everyone, welcome to point out errors

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.