作者:LeonaL_1巛980 | 来源:互联网 | 2023-02-04 06:18
本教程展示了如何使用Dagger 2将依赖项注入活动AndroidInjectionModule
- 一个非常简单的例子.我的用例有点复杂:
App extends Application implements HasDispatchingActivityInjector
,
ActivityOne
使用的初始化ActivityModule
.使用此活动,DepOne
创建依赖项,
ActivityTwo
具有在DepTwo
没有预先存在的情况下无法正确初始化的依赖项DepOne
.
我想出的解决方案是:
创建一个AppComponent
作为应用程序的主要组件,
创建一个ComponentTwo
as的子组件AppComponent
.在运行时添加它,一旦DepOne
可用,并DepTwo
在其中提供,
注入ActivityTwo
内部ComponentTwo
.
但是,这需要,ActivityModule
目前看起来像这样:
@Module(subcompOnents= {
ActivityOneSubcomponent.class,
ActivityTwoSubcomponent.class
})
public abstract class ActivityModule {
@Binds
@IntoMap
@ActivityKey(ActivityOne.class)
abstract AndroidInjector.Factory extends Activity> bindLoginActivityInjectorFactory(ActivityOneSubcomponent.Builder builder);
@Binds
@IntoMap
@ActivityKey(ActivityTwo.class)
abstract AndroidInjector.Factory extends Activity> bindWorldActivityInjectorFactory(ActivityTwoSubcomponent.Builder builder);
}
被分成两个不同的模块,一个用于ActivityOne
绑定AppComponent
,另一个用于ActivityTwo
(和其他未来的活动)绑定ComponentTwo
.
我做到了,但Dagger在尝试注入时在运行时抗议ActivityTwo
:
Caused by: java.lang.IllegalArgumentException: No injector factory bound for Class
似乎应用程序无法看到添加的子组件提供的喷射器工厂.
有什么想法/提示吗?
编辑:我按照要求在下面发布了再现代码(实际上没有Dagger-injectable属性,因为我把它们刮掉了):
ActivityOne.java
public class ActivityOne extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
AndroidInjection.inject(this);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
enterPartTwo();
}
private void enterPartTwo() {
App.app(this).makeComponentTwo();
ActivityTwo.start(this);
finish();
}
}
ActivityOneModule.java
@Module(subcompOnents= {
ActivityOneSubcomponent.class
})
public abstract class ActivityOneModule {
@Binds
@IntoMap
@ActivityKey(ActivityOne.class)
abstract AndroidInjector.Factory extends Activity> bindActivityOneInjectorFactory(ActivityOneSubcomponent.Builder builder);
}
ActivityOneSubcomponent.java
@Subcomponent
public interface ActivityOneSubcomponent extends AndroidInjector {
@Subcomponent.Builder
abstract class Builder extends AndroidInjector.Builder {}
}
ActivityTwo.java
public class ActivityTwo extends AppCompatActivity {
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
AndroidInjection.inject(this);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_world);
}
public static void start(Context from) {
Intent intent = new Intent(from, ActivityTwo.class);
from.startActivity(intent);
}
}
ActivityTwoModule.java
@Module(subcompOnents= {
ActivityTwoSubcomponent.class
})
public abstract class ActivityTwoModule {
@Binds
@IntoMap
@ActivityKey(ActivityTwo.class)
abstract AndroidInjector.Factory extends Activity> bindActivityTwoInjectorFactory(ActivityTwoSubcomponent.Builder builder);
}
ActivityTwoSubcomponent.java
@Subcomponent
public interface ActivityTwoSubcomponent extends AndroidInjector {
@Subcomponent.Builder
abstract class Builder extends AndroidInjector.Builder {}
}
App.java
public class App extends Application implements HasDispatchingActivityInjector {
@Inject
DispatchingAndroidInjector dispatchingAndroidInjector;
AppComponent appComponent;
ComponentTwo componentTwo;
@Override
public void onCreate() {
super.onCreate();
appCompOnent= DaggerAppComponent.create();
appComponent.inject(this);
}
@Override
public DispatchingAndroidInjector activityInjector() {
return dispatchingAndroidInjector;
}
public void makeComponentTwo() {
compOnentTwo= appComponent.inGameComponent()
.build();
}
public static App app(Context context) {
return (App) context.getApplicationContext();
}
}
AppComponent.java
@Singleton
@Component(modules = {ActivityOneModule.class,
AndroidInjectionModule.class})
public interface AppComponent {
void inject(App app);
ComponentTwo.Builder inGameComponent();
}
ComponentTwo.java
@ScopeTwo
@Subcomponent(modules = {ActivityTwoModule.class})
public interface ComponentTwo {
@Subcomponent.Builder
interface Builder {
ComponentTwo build();
}
}
ScopeTwo.java
@Qualifier
@Retention(RetentionPolicy.RUNTIME)
public @interface ScopeTwo {
}
堆栈跟踪:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.abc, PID: 5923
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.abc/com.example.abc.ActivityTwo}: java.lang.IllegalArgumentException: No injector factory bound for Class
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.IllegalArgumentException: No injector factory bound for Class
at dagger.android.DispatchingAndroidInjector.inject(DispatchingAndroidInjector.java:105)
at dagger.android.AndroidInjection.inject(AndroidInjection.java:61)
at com.example.abc.ActivityTwo.onCreate(ActivityTwo.java:22)
at android.app.Activity.performCreate(Activity.java:6237)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
希望它有助于回答这个问题.