[英]Android Architecture Components - ViewModel Observable & Proguard
我無法讓ViewModel組件與Proguard一起工作。 我已經不得不添加以下內容以防止由於NoSuchMethodException導致崩潰:init()
-keep class com .... SlideshowViewModel {*;}
但是,我在活動中的觀察者沒有收到任何數據。 這個工作正常,直到我啟用Proguard,所以我知道Proguard是原因,我只是不知道為什么(新手Proguardian在這里)。 我需要添加什么規則才能使可觀察量有效?
我的ViewModel(Kotlin)中有以下內容
val currentItem = MediatorLiveData<MediaItem>()
....后來...
Timber.d("Setting next image: " + position + " out of " + mediaItemList.size)
currentItem.value = mediaItemList[position]
和活動(Java)
viewModel.getCurrentItem().observe(this, new Observer<MediaItem>() {
@Override
public void onChanged(@Nullable final MediaItem mediaItem) {
Timber.d("Activity received new item");
}
});
在我收到的日志中:D / SlideshowViewModel:設置下一張圖片:18中的0
但是在onChanged Observable中沒有任何東西被解雇。
發現於: https : //issuetracker.google.com/issues/62113696
它應盡快修復(尚未在alpha3中修復)
## Android architecture components: Lifecycle
# LifecycleObserver's empty constructor is considered to be unused by proguard
-keepclassmembers class * implements android.arch.lifecycle.LifecycleObserver {
<init>(...);
}
# ViewModel's empty constructor is considered to be unused by proguard
-keepclassmembers class * extends android.arch.lifecycle.ViewModel {
<init>(...);
}
# keep Lifecycle State and Event enums values
-keepclassmembers class android.arch.lifecycle.Lifecycle$State { *; }
-keepclassmembers class android.arch.lifecycle.Lifecycle$Event { *; }
# keep methods annotated with @OnLifecycleEvent even if they seem to be unused
# (Mostly for LiveData.LifecycleBoundObserver.onStateChange(), but who knows)
-keepclassmembers class * {
@android.arch.lifecycle.OnLifecycleEvent *;
}
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