Java 子组件中的Dagger 2模块超控
我有一个应用程序,它的子组件是这样的Java 子组件中的Dagger 2模块超控,java,android,dependency-injection,dagger,dagger-2,Java,Android,Dependency Injection,Dagger,Dagger 2,我有一个应用程序,它的子组件是这样的 -------- ApplicationComponent ------------ | | | | | | Service Component Activity Component |
-------- ApplicationComponent ------------
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Service Component Activity Component
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Fragment Component
一切正常,但我想做一件事。
Android M需要运行时权限,所以我决定创建Controller,类似于helper类的东西,它将被注入到
Fragment或
活动中`
公共接口
public interface PermissionController {
boolean hasPermissionInManifest(String permissionName);
boolean isPermissionGranted(String permission);
/**
* Request permission for Android 6
*
* @param permission permission that is requested
* @param requestCode request code
* @return if user is going to be asked about permission so we need to handle callback, otherwise
* user was already asked or permission is not required cause of android lower version
*/
boolean requestPermission(int requestCode, String permission);
void requestPermissions(int requestCode, String... permissions);
}
以及来自不同实现的一种方法PermissionActivityManager
和PermissionFragmentManager
@Override
public boolean requestPermission(int requestCode, String permission) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (mContext.checkSelfPermission(permission)
!= PackageManager.PERMISSION_GRANTED) {
mContext.requestPermissions(new String[]{permission},
requestCode);
return true;
}
}
return false;
}
和片段
实现
@Override
public boolean requestPermission(int requestCode, String permission) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(mFragment.getActivity(), permission)
!= PackageManager.PERMISSION_GRANTED) {
mFragment.requestPermissions(new String[]{permission},
requestCode);
return true;
}
}
return false;
}
希望你有个主意
但是关于这个问题,我的FragmentComponent
是ActivityComponent
它们都有PermissionModule
@PerActivity
@Subcomponent(
modules = {
ActivityModule.class,
PermissionModule.class
})
public interface ActivityComponent {
Activity activity();
FragmentComponent fragmentComponent(FragmentModule module);
void inject(BaseActivity baseActivity);
void inject(MainAppActivity mainAppActivity);
}
对于片段
@Subcomponent(
modules = {
FragmentModule.class,
ProviderModule.class,
PermissionModule.class
})
@PerFragment
public interface FragmentComponent {
Fragment fragment();
void inject(BaseFragment baseFragment);
}
除了注释和返回的实例之外,和模块是相同的
@PerFragment
@Module
public class PermissionModule {
@PerFragment
@Provides
PermissionController providePermissionController(Fragment fragment) {
return new PermissionFragmentManager(fragment);
}
}
@PerActivity
@Module
public class PermissionModule {
@PerActivity
@Provides
PermissionController providePermissionController(Activity activity) {
return new PermissionActivityManager(activity);
}
}
所以我的问题是-是否有任何方法可以覆盖父组件中使用的provide
方法,或者有其他方法来解决问题?
因为在我的例子中,PermissionActivityManager
被注入 @Subcomponent
继承超级作用域组件的所有绑定。在本例中,这是@ActivityScope
组件
如果要控制继承的依赖项,必须使用组件依赖项。组件依赖关系允许您仅继承由provision方法指定的绑定
如果您不想修补新的构建器,那么我建议使用@Named(“activity”)
和@Named(“fragment”)
注释来指定要注入的权限处理程序的类型。你必须把它放在你的@Inject
注释字段和@提供的注释方法上。谢谢你的回答,我按照你昨天建议的做了,效果很好