A compile-time dependency injection framework for Java and Android that generates plain Java source code.
Dagger is a dependency injection framework for Java and Android that operates entirely at compile-time. It analyzes dependencies, validates the graph, and generates plain Java source code, eliminating the need for reflection or runtime bytecode generation. This approach solves the problem of managing complex object graphs while ensuring performance and early error detection.
Java and Android developers building applications that require maintainable, testable, and scalable dependency management. It's particularly valuable for teams working on large codebases where manual dependency handling becomes cumbersome.
Developers choose Dagger for its compile-time safety, which catches dependency errors early, and its performance, as it avoids reflection overhead. Its integration with Android via Hilt and support for multiple build systems make it a robust, industry-standard solution.
A fast dependency injector for Android and Java.
Open-Awesome is built by the community, for the community. Submit a project, suggest an awesome list, or help improve the catalog on GitHub.
Dagger validates the dependency graph during compilation, catching errors early and eliminating runtime failures, as emphasized in its focus on correctness.
It generates plain Java source code without reflection or runtime bytecode generation, ensuring efficient and predictable performance with minimal overhead.
Dedicated modules like Dagger Android and Hilt streamline dependency injection for Android apps, reducing boilerplate for components like Activities and Fragments.
Works with popular build systems including Bazel, Maven, and Gradle, integrating seamlessly into existing development workflows as shown in the detailed setup instructions.
The README outlines extensive, multi-step setup for Bazel, which can be overwhelming and time-consuming for teams not already invested in this build tool.
Reliance on annotations leads to verbose code that can clutter classes and reduce readability, especially in large-scale projects with complex dependency graphs.
Mastering Dagger's concepts, such as components and modules, requires significant upfront effort, and error messages can be cryptic for newcomers.