Dependency Injection in Android using Dagger 2
summary
Dagger 2 provides compile-time dependency injection for Android that removes reflection, runs much faster than Guice/Roboguice and surfaces configuration errors at compile time, though graph composition can force extra recompiles. It uses @Module/@Provides methods and a @Component interface to wire dependencies, supports field/constructor/method injection, and allows custom scopes so you can have application vs activity scope singletons. Example: SharedPreferences injected into a data store via constructor, easily replaced with test doubles; generated code is readable and the approach works in real apps.
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chapters (7)
- 0:00Start
- 3:47Definition of Dependency Injection
- 5:26Three Types of Injections
- 6:46Dependency Injection Libraries
- 10:00Issues with Dependency with Dagger
- 15:30Kinds of Injection
- 15:52Constructor Injection
