我正在使用MVVM架构和Retrofit获取图像。现在我想添加一些功能,比如图像编辑、压缩和上传。
我的问题是:对于MVVM架构,这些功能的业务逻辑是否是用例?
domain: usecase - ImageCompressionUseCase.kt - UploadImageUseCase.kt ui: - ImageCompressionViewModel.kt - ImageCompressionFragment.kt - UploadImageViewModel.kt - UploadImageFragment.kt
我的想法是它们属于用例,但我还有点犹豫 :)
ImageCompressionUseCase.kt
我的问题是:对于MVVM架构,这些功能的业务逻辑是否是用例?
domain: usecase - ImageCompressionUseCase.kt - UploadImageUseCase.kt ui: - ImageCompressionViewModel.kt - ImageCompressionFragment.kt - UploadImageViewModel.kt - UploadImageFragment.kt
我的想法是它们属于用例,但我还有点犹豫 :)
ImageCompressionUseCase.kt
@Singleton
class ImageCompressionUseCase @Inject constructor(@ApplicationContext private val context: Context) {
suspend operator fun invoke(name:String) : Result<File> = runCatching {
withContext(Dispatchers.IO){
val output = File(context.filesDir,"$name.png")
// some logic to image compression
output
}
}
}
ImageCompressionViewModel.kt
@HiltViewModel
class ImageCompressionViewModel @Inject constructor(private val imageCompressionUseCase: ImageCompressionUseCase) : ViewModel() {
private val _isLoading = MutableLiveData<Boolean>()
val isLoading get() = _isLoading
private val _data = MutableLiveData<Result<File>>()
val data get() = _data
fun start(){
viewModelScope.launch {
_isLoading.value = true
_data.value = imageCompressionUseCase("example_name")
_isLoading.value = false
}
}
}