存储库类
public Observable<Weather> requestWeather (String location,String unit,String appId){
return weatherAPI.requestWeather(location, unit,appId);
}
GetUseCase
public interface GetUseCase {
void execute(String location,String unit,String appId);
}
GetUseCaseImpl
public class GetUseCaseImpl implements GetUseCase {
private WeatherRepositorty weatherRepositorty;
private CompositeDisposable disposable = new CompositeDisposable();
private MutableLiveData<WeatherViewStated> mutableLiveData = new MutableLiveData<>();
public GetUseCaseImpl() {
weatherRepositorty = WeatherRepositorty.getInstance();
}
@Override
public void execute(String location, String unit, String appId) {
disposable.add(weatherRepositorty.requestWeather(location, unit, appId).subscribeOn(Schedulers.io()).doOnSubscribe((newsList) -> onLoading())
.subscribe(this::onSuccess,
this::onError));
}
private void onSuccess(Weather weather) {
WeatherViewStated.SUCCESS_STATE.setData(weather);
mutableLiveData.postValue(WeatherViewStated.SUCCESS_STATE);
}
private void onError(Throwable error) {
WeatherViewStated.ERROR_STATE.setError(error);
mutableLiveData.postValue(WeatherViewStated.ERROR_STATE);
}
private void onLoading() {
mutableLiveData.postValue(WeatherViewStated.LOADING_STATE);
}
}
WeatherView已声明
public class WeatherViewStated extends WeatherViewState<Weather> {
private WeatherViewStated(Weather data, int currentState, Throwable error) {
this.data = data;
this.error = error;
this.currentState = currentState;
}
public static WeatherViewStated ERROR_STATE = new WeatherViewStated(null, WeatherViewState.State.FAILED.value, new Throwable());
public static WeatherViewStated LOADING_STATE = new WeatherViewStated(null, State.LOADING.value, null);
public static WeatherViewStated SUCCESS_STATE = new WeatherViewStated(new Weather(), State.SUCCESS.value, null);
}
WeatherViewModel
public class WeatherViewModel extends ViewModel {
private MutableLiveData<Weather> mutableWeatherLiveData;
private WeatherRepositorty weatherRepositorty;
public void init(String location,String unit,String appID) {
}
}
这是我的代码，我正在尝试使用mvvm clean体系结构编写代码，但是我无法在GetUseCase和GetUseCaseImpl中添加代码，以便可以在Viewmodel类中获取MutableLiveDta成功和失败状态，以便可以在MainActvitiy中使用它，请建议我调用以及如何在View Model中获取数据。
最佳答案
更改用例
public interface GetUseCase {
void execute(String location,String unit,String appId);
}
到
public interface GetUseCase {
Observable<Weather> execute(String location,String unit,String appId);
}
GetUseCaseImpl至
public class GetUseCaseImpl implements GetUseCase {
private WeatherRepositorty weatherRepositorty;
public GetUseCaseImpl() {
weatherRepositorty = WeatherRepositorty.getInstance();
}
@Override
public Observable<Weather> execute(String location, String unit, String appId) {
return weatherRepositorty.requestWeather(location, unit, appId)
}
}
View 模型
public class WeatherViewModel extends ViewModel {
private CompositeDisposable disposable = new CompositeDisposable();
private MutableLiveData<WeatherViewStated> mutableLiveData = new
MutableLiveData<>();
private GetUseCaseImpl useCaseImpl = new GetUseCaseImpl()
public void init(String location,String unit,String appID) {
disposable.add(useCaseImpl.execute(location, unit, appId).subscribeOn(Schedulers.io()).doOnSubscribe((newsList) -> onLoading())
.subscribe(this::onSuccess,
this::onError));
}
private void onSuccess(Weather weather) {
WeatherViewStated.SUCCESS_STATE.setData(weather);
mutableLiveData.postValue(WeatherViewStated.SUCCESS_STATE);
}
private void onError(Throwable error) {
WeatherViewStated.ERROR_STATE.setError(error);
mutableLiveData.postValue(WeatherViewStated.ERROR_STATE);
}
private void onLoading() {
mutableLiveData.postValue(WeatherViewStated.LOADING_STATE);
}
override fun onCleared() {
disposable.clear()
}
}
关于android - 如何在Android中为MVVM Clean架构创建用例，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/60220564/