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2021.11.17(Wed) potatotips #76 Android 発表枠
@the_uhooi
Fragment の inflate を
で行う
自動
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Mobile app developer @uhooi
@uhooi
@the_uhooi
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PICTURE BOOK
MONSTER
ORIGINAL
累計100万DL（予定）
主要画面数2
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Fragment の inflate を自動で行う
class MainFragment : Fragment() {
private var _binding: MainFragmentBinding? = null
private val binding get() = _binding!!
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View {
_binding = MainFragmentBinding.inflate(
inflater, container, false)
return binding.root
}
}
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Fragment の inflate を自動で行う
引用: https://developer.android.com/topic/libraries/view-binding
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Fragment の inflate を自動で行う
引用: https://github.com/android/architecture-components-samples/blob/master/ViewBindingSample/app/src/main/java/com/android/example/viewbindingsample/BindFragment.kt#L36-L41
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Fragment の inflate を自動で行う
- class MainFragment : Fragment() {
- override fun onCreateView(
- inflater: LayoutInflater,
- container: ViewGroup?,
- savedInstanceState: Bundle?
- ): View {
- _binding = MainFragmentBinding.inflate(
- inflater, container, false)
- return binding.root
- }
+ class MainFragment : Fragment(R.layout.main_fragment) {
private var _binding: MainFragmentBinding? = null
private val binding get() = _binding!!
}
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Fragment の inflate を自動で行う
class MainFragment : Fragment(R.layout.main_fragment) {
// ...
override fun onViewCreated(
view: View,
savedInstanceState: Bundle?
) {
super.onViewCreated(view, savedInstanceState)
binding.imageview.setOnClickListener {
// ...
}
}
}
+ val binding = MainFragmentBinding.bind(view)
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Fragment の inflate を自動で行う
class MainFragment : Fragment(R.layout.main_fragment) {
// ...
}
- private var _binding: MainFragmentBinding? = null
- private val binding get() = _binding!!
- override fun onDestroyView() {
- super.onDestroyView()
-
- _binding = null
- }
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・Fragment にレイアウトを渡すと自動で inflate する
・必要なければフィールドに binding を保持しない
まとめ