Audio (View, Custom, Visualizer,....)

 * Visualizer:

- gauravk95/audio-visualizer-android: 🎵 [Android Library] A light-weight and easy-to-use Audio Visualizer for Android. (github.com)

- GautamChibde/android-audio-visualizer: :musical_keyboard: Audio visualisation for android MediaPlayer :sound: (github.com)

- jeffshee/NextGenVisualizer: Audio visualizer library for Android. Written in Kotlin. Light-weight, Flexible, Easy. (github.com)

- bogerchan/Nier-Visualizer: A lightweight and efficient Android visual library. (github.com)

- felixpalmer/android-visualizer: Takes the input from the Android MediaPlayer and displays visualizations, like in iTunes or WinAmp (github.com)

- GitHubZJY/AudioVisualizeView: 🎵🎵🎵 许多音乐App上常见的音频可视化效果，读取音频数据并利用傅里叶转换成可视化的字节数据，再通过自定义View渲染而成。An audio visualization effect like many music app, read audio data and use Fourier transform to visual byte data, and then through custom view rendering.