参考： * [Dagger2使用详解](http://zpayh.xyz/2016/07/07/Dagger2%E4%BD%BF%E7%94%A8%E8%AF%A6%E8%A7%A3/index.html) * [dagger2让你爱不释手](http://www.jianshu.com/p/cd2c1c9f68d4) * [这是一个说明视频](https://www.youtube.com/watch?v=2Vnt39V0taQ) * [掘金翻译-Dependency-Injection-with-Dagger-2](https://github.com/xitu/gold-miner/blob/master/TODO/Dependency-Injection-with-Dagger-2.md) * [Dagger2 学习资料集合](https://juejin.im/entry/585941a4b123db0065909365)