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import android.app.Application | |
import androidx.databinding.Observable | |
import androidx.databinding.PropertyChangeRegistry | |
import androidx.lifecycle.AndroidViewModel | |
abstract class ObservableViewModel(app: Application): AndroidViewModel(app), Observable { | |
@delegate:Transient | |
private val mCallBacks: PropertyChangeRegistry by lazy { PropertyChangeRegistry() } | |
override fun addOnPropertyChangedCallback(callback: Observable.OnPropertyChangedCallback) { | |
mCallBacks.add(callback) | |
} | |
override fun removeOnPropertyChangedCallback(callback: Observable.OnPropertyChangedCallback) { | |
mCallBacks.remove(callback) | |
} | |
fun notifyChange() { | |
mCallBacks.notifyChange(this, 0) | |
} | |
fun notifyChange(viewId:Int){ | |
mCallBacks.notifyChange(this, viewId) | |
} | |
} |
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