wada811 / ViewLifecycleProperty

ViewLifecycleProperty makes easy declaring the property that has the same lifecycle as Fragment's view.

ViewLifecycleProperty

ViewLifecycleProperty makes easy declaring the property that has the same lifecycle as Fragment's view.

Overview

ViewLifecycleProperty is

• lazy initialization
• accessible when Fragment's view isn't null i.e., between onCreateView and onDestroyView
• automatically cleared by null when Fragment's view released i.e., after onDestroyView

Usage

val by lazy style

class SampleFragment : Fragment(R.layout.sample_fragment) {
    private val property: SampleProperty by viewLifecycle { SampleProperty(viewLifecycleOwner) }
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        // You can use property
    }
    override fun onDestroyView() {
        super.onDestroyView()
        // You can use property unlike AutoClearedValue
    }
}

AutoClearedValue style

class SampleFragment : Fragment(R.layout.sample_fragment) {
    private var property: SampleProperty by viewLifecycle()
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        // You must initialize before using property
        property = SampleProperty(viewLifecycleOwner)
        // You can use property
    }
    override fun onDestroyView() {
        super.onDestroyView()
        // You can use property unlike AutoClearedValue
    }
}

Gradle

repositories {
    mavenCentral()
}

dependencies {
    implementation 'com.wada811.viewlifecycleproperty:viewlifecycleproperty:x.y.z'
}

License

Copyright (C) 2020 wada811

Licensed under the Apache License, Version 2.0