作為一個(gè)碼農(nóng)，什么都不用多講，貼代碼

build project

build module

Application

public class App extends Application {private AppComponent appComponent;@Override public void onCreate() {super.onCreate();appComponent= DaggerAppComponent.builder().appModule(new AppModule(this)).build();}public AppComponent getAppComponent() {return appComponent;}} View Code AppComponent @Singleton @Component(modules = { AppModule.class }) public interface AppComponent {@ContextLife("Application")App getApplication();RetrofitHelper retrofitHelper(); //提供http的幫助類 } View Code AppModule @Module public class AppModule {private App application;public AppModule(App application){this.application=application;}@Provides@Singleton@ContextLife("Application")public App provideApplication(){return application;}@Provides@Singletonpublic RetrofitHelper provideRetrofitHelper() {return new RetrofitHelper();}} View Code ActivityComponent @ActivityScope @Component(dependencies = AppComponent.class, modules = ActivityModule.class)//關(guān)聯(lián)上下 public interface ActivityComponent {Activity getActivity();void inject(LoginActivity loginActivity);//要在類中使用注入功能void inject(MainActivity mainActivity);} View Code ActivityModule @Module public class ActivityModule {private Activity mActivity;public ActivityModule(Activity activity) {this.mActivity = activity;}@Provides@ActivityScopepublic Activity provideActivity() {return mActivity;}@Provides@ActivityScopepublic IPresenterFactory providePresenter(RetrofitHelper retrofitHelper) {return new PresenterFactory(retrofitHelper);}} View Code

Base里面使用注入，否則無法注入

public abstract class PresenterActivity extends BaseActivity {private final static String TAG = "PresenterActivity";protected abstract void initInject();@Overrideprotected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);initInject();}protected ActivityComponent getActivityComponent(){return DaggerActivityComponent.builder().appComponent(App.getInstance().getAppComponent()).activityModule(getActivityModule()).build();}private ActivityModule getActivityModule() {return new ActivityModule(this);}} View Code

此時(shí)前提條件都有了

點(diǎn)擊運(yùn)行自動(dòng)生成注入代碼（沒問題的前提）

使用注入：

public class MainActivity extends PresenterActivity {@Injectprotected IPresenterFactory mPresenter;//沒有創(chuàng)建對(duì)象，inject標(biāo)簽注入類型private final int BASIC_PERMISSION_REQUEST_CODE = 100;private TextView username;@Overridepublic void findView() {username = findView(R.id.username);username.setText(App.getInstance().getUserEntity().getName()+" hello");}@Overridepublic void init() {if (mPresenter != null){Toasts.showShort("mPresenter success",context);//注入成功會(huì)打印出success}}@Overridepublic int layoutResID() {return R.layout.activity_main;}@Overrideprotected void initInject() {getActivityComponent().inject(this);}@Subscribe(threadMode = ThreadMode.MAIN)public void onEvent() {Toasts.showShort("刷新UI",context);}}

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轉(zhuǎn)載于:https://www.cnblogs.com/LiuZhen/p/5923387.html

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