[英]Android Architecture Components - ViewModel Observable & Proguard
我无法让ViewModel组件与Proguard一起工作。 我已经不得不添加以下内容以防止由于NoSuchMethodException导致崩溃:init()
-keep class com .... SlideshowViewModel {*;}
但是,我在活动中的观察者没有收到任何数据。 这个工作正常,直到我启用Proguard,所以我知道Proguard是原因,我只是不知道为什么(新手Proguardian在这里)。 我需要添加什么规则才能使可观察量有效?
我的ViewModel(Kotlin)中有以下内容
val currentItem = MediatorLiveData<MediaItem>()
....后来...
Timber.d("Setting next image: " + position + " out of " + mediaItemList.size)
currentItem.value = mediaItemList[position]
和活动(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:设置下一张图片:18中的0
但是在onChanged Observable中没有任何东西被解雇。
发现于: https : //issuetracker.google.com/issues/62113696
它应尽快修复(尚未在alpha3中修复)
## 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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