How to Inject User Input Parameter into a Dagger 2 Object?

How can I pass a user inputted parameter (String) into an object managed by Dagger 2, alongside other dependencies?

public class Util {
    @Inject
    public Util(Validator validator, String address) {
        // constructor implementation
    }
}

To pass a user-inputted parameter alongside an object dependency in a Dagger 2 setup, you generally cannot inject parameters directly from the context in which Dagger operates, as it requires static dependencies. However, you can achieve this by creating a factory method or a custom provider that takes this additional parameter and returns the desired object.

@Module
public class UtilModule {
    @Provides
    Util provideUtil(Validator validator, String address) {
        return new Util(validator, address);
    }
}

@Provides
String provideAddress() {
    return txtAddress.getText(); // replace with the appropriate way to access user input
}

Causes

• Dagger 2 does not support injecting non-static parameters directly due to its dependency injection framework design.
• User input parameters like Strings should usually be passed at runtime, while Dagger manages provides at compile time.

Solutions

• Create a factory class that requires both the Validator instance and the user-provided String parameter and returns a new instance of the Util class.
• Adjust the Dagger setup to use the factory method to provide an instance of Util.

Mistake: Attempting to inject non-singleton objects without a factory or provider method.

Solution: Use a factory method to create instances requiring input parameters.

Mistake: Forgetting to provide the String parameter in the Dagger graph.

Solution: Ensure all parameters are provided where needed.