在我的项目中,我使用 Salut 库来使用Wi-Fi Direct。下面是类的构造函数:
public Salut(SalutDataReceiver dataReceiver,
SalutServiceData salutServiceData,
SalutCallback deviceNotSupported) {
...
}
SalutDataReceiver类作为参数引用了活动。他还进行了回调。下面是类的构造函数:
public SalutDataReceiver(Activity activity, SalutDataCallback dataCallback) {
}
由于与活动之间存在严格的联系,因此我认为该对象应该从外部转移。下面是模块和组件的类:
@Module
public class WifiCommunicationModule {
public WifiCommunicationModule() {
}
@Provides
@Singleton
public Salut provideSalut(SalutDataReceiver dataReceiver) {
SalutServiceData serviceData = new SalutServiceData("testService", 50489, "test");
return new Salut(dataReceiver, serviceData, null);
}
}
@Singleton
@Component(modules = {
AppModule.class,
WifiCommunicationModule.class
})
public interface MainComponent {
void inject(MainActivity activity);
}
public class MainActivity extends AppCompatActivity {
@Inject
Salut salut;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
但是在编译时会抛出异常:
错误:(25,10)错误:com.peak.salut.SalutDataReceiver不能为 没有@Inject构造函数提供或从@Provides注释提供 方法。 com.peak.salut.SalutDataReceiver在以下位置注入 com.test.modules.WifiCommunicationModule.provideSalut(dataReceiver) com.peak.salut.Salut被注入 com.test.views.activities.MainActivity.salut com.test.views.activities.MainActivity在以下位置注入 com.test.components.MainComponent.inject(活动)
更新
先生。 @Zayniddin Mamarasulov建议您从SalutDataReceiver创建派生类,并将构造函数标记为@Inject。不幸的是,这也行不通
public class SalutDataReceiverExtension extends SalutDataReceiver {
@Inject
public SalutDataReceiverExtension(Activity activity, SalutDataCallback dataCallback) {
super(activity, dataCallback);
}
}
@Module
public class WifiCommunicationModule {
public WifiCommunicationModule() {
}
@Provides
@Singleton
public Salut provideSalut(SalutDataReceiverExtension dataReceiver) {
SalutServiceData serviceData = new SalutServiceData("testService", 50489, "test");
return new Salut(dataReceiver, serviceData, null);
}
}
错误:(25,10)错误:没有以下内容就无法提供android.app.Activity @Inject构造函数或@Provides注释方法。 android.app.Activity被注入 com.test.implementation.SalutDataReceiverExtend。(活动,…) com.test.implementation.SalutDataReceiverExtend在以下位置注入 com.test.modules.WifiCommunicationModule.provideSalut(dataReceiver) com.peak.salut.Salut被注入 com.test.views.activities.MainActivity.salut com.test.views.activities.MainActivity在以下位置注入 com.test.components.MainComponent.inject(活动)
答案 0 :(得分:0)
像这样向SalutDataReceiver的构造函数添加@Inject注释:
printf '%s\n' "${files[@]}" # i.e. path/to/source/filename.tar.gz