A FRESH APPROACH TO DI TOOTHPICK https://github.com/stephanenicolas/toothpick/ 

ABOUT US Senior Android Dev @ Groupon ~20 years of Java coding OSS: Dart, TP STEPHANE NICOLAS DANIEL MOLINERO REGUERA Android Dev @ Groupon Best level 3 ever OSS: Dart, +stephane)nicolas @D_Lemures 

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 jobs.groupon.com/careers/ 

THE TALK WHY DI ? WHY TOOTHPICK? TOOTHPICK FEATURES 
 ADVANCED FEATURES 
 
 CONCLUSION SCOPE MODULES & BINDINGS SCOPE TREE SCOPE SINGLETONS MVP & STATE PRESERVATION MULTIPLE ACTIVITIES FLOWS 

WHY DI ? DECOUPLE REUSE TEST USES USES USES MOCK USES 

WHY TOOTHPICK? SIMPLER BETTER TEST SUPPORT EVEN FASTER 

TOOTHPICK FEATURES public class SmoothieMachine {
 
 @Inject IceMachine iceMachine;
 
 public void doSmoothie() {
 iceMachine.makeIce();
 }
 } @Singleton
 public class IceMachine {
 Foo foo;
 
 @Inject
 public IceMachine(Foo foo) {
 this.foo = foo;
 }
 JSR 330 annotations→nothing new here 

TOOTHPICK FEATURES SCOPE SCOPE MAKE INJECTIONS public class MyApplication extends Application { @Inject Machine machine;
 
 @Override protected void onCreate() {
 super.onCreate();
 
 Scope appScope = Toothpick.openScope(this); appScope.installModules(…); Toothpick.inject(this, appScope);
 } } 

TOOTHPICK FEATURES SCOPE, MODULES & BINDINGS SCOPE BINDINGS MODULES public class MyApplication extends Application { @Inject Machine machine;
 
 @Override protected void onCreate() {
 super.onCreate();
 
 Scope appScope = Toothpick.openScope(this); appScope.installModules(new Module() {{
 bind(Machine.class).to(IceMachine.class); }});
 Toothpick.inject(this, appScope);
 } } 

TOOTHPICK FEATURES APPLICATION
 SCOPE ACTIVITY 1
 SCOPE ACTIVITY 2
 SCOPE SERVICE 1
 SCOPE FRAGMENT 3
 SCOPE FRAGMENT 1
 SCOPE FRAGMENT 2
 SCOPE SCOPE TREE 

TOOTHPICK FEATURES public class LemonActivity extends Activity {
 
 @Inject SmoothieMachine smoothieMachine;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 Scope scope = Toothpick.openScopes(getApplication(), this);
 scope.installModules(…);
 Toothpick.inject(this, scope);
 } } SCOPE TREE APPLICATION
 SCOPE ACTIVITY
 SCOPE 

TOOTHPICK FEATURES APPLICATION
 SCOPE ACTIVITY
 SCOPE APP SINGLETONS ACTIVITY SINGLETONS SCOPE SINGLETONS 

TOOTHPICK FEATURES public class Module extends Module {
 public Module1() {
 bind(Machine.class).toInstance(new IceMachine());
 }
 } SCOPE SINGLETONS SINGLETONS CAN BE DEFINED IN MODULES 

TOOTHPICK FEATURES @Singleton
 public class IceMachine {
 } @ActivitySingleton
 public class SmoothieMachine {
 } APPLICATION
 SCOPE ACTIVITY
 SCOPE SCOPE SINGLETONS OR USING ANNOTATIONS 

ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION 

ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION Landscape Portrait 

PRESENTER INSTANCE APPLICATION SCOPE PRESENTER SCOPE ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION ACTIVITY SCOPE 

ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION public class MyActivity extends Activity {
 
 @Inject MyPresenter presenter; 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 Scope scope = openScopes(getApplication(), 
 PresenterSingleton.class, 
 this);
 Toothpick.inject(this, scope);
 } } 

@PresenterSingleton
 public class MyPresenter {
 String dealId;
 int quantity;
 } PRESENTER SCOPE MVP & STATE PRESERVATION ADVANCED TOOTHPICK FEATURES 

ACTIVITY 1 ADVANCED TOOTHPICK FEATURES ACTIVITY 3 ACTIVITY 2 MULTI ACTIVITY FLOWS Purchase Flow ! 

APPLICATION SCOPE ACTIVITY 1 SCOPE ADVANCED TOOTHPICK FEATURES FLOW SCOPE ACTIVITY 3 SCOPE ACTIVITY 2 SCOPE MULTI ACTIVITY FLOWS 

ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION public class MyActivity extends Activity {
 
 @Inject ShoppingCart shoppingCart; 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 Scope scope = openScopes(getApplication(), 
 FlowSingleton.class, 
 this);
 Toothpick.inject(this, scope);
 } } 

@FlowSingleton
 public class ShoppingCart {
 List purchases…
 } FLOW SCOPE MULTI ACTIVITY FLOWS ADVANCED TOOTHPICK FEATURES 

CONCLUSION QUESTIONS ? COMMENTS ? 

A FRESH APPROACH TO DI TOOTHPICK https://github.com/stephanenicolas/toothpick/ +stephane)nicolas @D_Lemures