How to pass parameters in dagger2? - dagger

Question

Like the following:
public class MainActivity extends Activity {
#Inject
User mUser1;
#Inject
User mUser2;
#Inject
User mUser3;
protected void onCreate(#Nullable Bundle savedInstanceState) {
// how to inject ...
......
Log.d("XXX",mUser1.getName());
Log.d("XXX",mUser2.getName());
Log.d("XXX",mUser3.getName());
}
}
public class User {
private final String name;
public User (String name) {
this.name = name;
}
public String getName() {
return name;
}
}
#Module
public class MainModule {
#Provides
User providesUser(String name) {
return new User(name);
}
#Provides
String providesUser() {
return "Jack";
}
}
#Component(modules = MainModule .class)
public interface ChildComponent {
void inject(MainActivity activity);
}
Above the code, only create three user object with same name, but i want to created with diff name
I try to use '#Qualifier', but it only distinguish constructor, can't transfer the name parameter
I try this in MainModule.java:
#Named("Yuri")
#Provides
User providesUser() {
return new User("yuri");
}
#Named("Warren")
#Provides
User providesUser() {
return new User("warren");
}
#Named("Jack")
#Provides
User providesUser() {
return new User("Jack");
}
But the method 'providesUser' is already defined.
Name parameter is final, can't modify
How should this situation be handled!!!

Answer 1

Method name doesn't matter. Only return type is what matters. So:
#Named("Yuri")
#Provides
User providesUserYuri() {
return new User("yuri");
}
#Named("Warren")
#Provides
User providesUserWarren() {
return new User("warren");
}
#Named("Jack")
#Provides
User providesUserJack() {
return new User("Jack");
}

Answer 2

If you want a dynamic name association, don't use #Qualifier, these are just for make differential of #Providers parameters.
Simply use Java POJO objects.
Now the User class would be like this:
public class User {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
Now in your Activity you can say this:
#Override
protected void onPostCreate(#Nullable Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
user1.setName("Ali");
user2.setName("Hossein");
user3.setName("Reza");
Log.d(TAG, user1.getName());
Log.d(TAG, user2.getName());
Log.d(TAG, user3.getName());
}