📚 后端程序员应该掌握的主流数据库知识

FFmpeg for Android, iOS and tvOS. Not maintained anymore. Superseded by FFmpegKit.

ttdevs's android demo

Dynamic Speedometer and Gauge for Android. amazing, powerful, and multi shape ⚡

🔥 ZXing的精简极速版，优化扫码和生成二维码/条形码，内置闪光灯等功能。扫描风格支持：微信的线条样式，支付宝的网格样式。几句代码轻松拥有扫码功能 ，ZXingLite让集成更简单。（扫码识别速度快如微信）

MP3音频录制，支持类似IOS原生的单边或者双边波形显示，低版本音频权限兼容，本地或者在线音频播放的波形显示，录制波形和播放波形会根据声音频率变色的功能，边播边缓存功能，简书入口http://www.jianshu.com/p/2448e2903b07

A fancy audio recorder lib for Android. Supports WAV format at 48kHz.

语音录制，竖线波纹，仿照QQ录音

Android wav/pcm 录音机，支持暂停、再录制。支持跳过静音区模式。

Android 录音实现

AudioRecorder: Android 录音及录音可视化相关lib,支持pcm、wav、mp3音频的录制

A android audio Waveform generator base on MediaCodec. 基于 MediaCodec 的 Android 音频波形图数据生成器。

Waveform view for Android (no longer actively maintained)

A highly customizable color picker for Android

😍 A beautiful, fluid, and extensible dialogs API for Kotlin & Android.

🎨 Color Picker Library for Android

🎨 Android colorpicker for getting colors from any images by tapping on the desired color.

🎰 The android library that provides a simple and customizable NumberPicker.

安卓选择器类库，包括日期及时间选择器（可设置范围）、单项选择器（可用于性别、职业、学历、星座等）、城市地址选择器（分省级、地级及县级）、数字选择器（可用于年龄、身高、体重、温度等）等……可以切换不同的模式（目前有普通模式，3d滚轮模式）

another NumberPicker with more flexible attributes on Android platform

Android最好的Spannable富文本工具, 唯一支持正则匹配/图文混排/图标/GIF动画/自定义表情包

A SiderBar base on Android that has a beautiful anim

A library that helps to schedule time-exact tasks(calendar reminders, alarms, etc.)

Combination of a beautiful clock with widget, alarm, stopwatch & timer, no ads

ANDROID. ChipsLayoutManager (SpanLayoutManager, FlowLayoutManager). A custom layout manager for RecyclerView which mimicric TextView span behaviour, flow layouts behaviour with support of amazing r…

A TagView library for Android. Customize your own & Drag effect.

版本检测升级（更新）库。an auto check version library（app update） on Android

Android Image Edit Lib. Android 图片编辑库，微信图片编辑库

A lightweight, plug-and-play indefinite pager indicator for RecyclerViews & ViewPagers.

Android: iOS-like over-scrolling effect applicable over almost all scrollable Android views.