theme: apple-basic
layout: intro
highlighter: shiki
lineNumbers: true
¶ Navigation 기초
¶ Jetpack Navigation의 도입
- FragmentManager
- add
- replace
- commit
supportFragmentManager.beginTransaction()
.replace(R.id.frame_layout, TestFragment())
.commit()
Note: We strongly recommend using the Navigation library to manage your app's navigation. The framework follows best practices for working with fragments, the back stack, and the fragment manager. For more information about Navigation, see Get started with the Navigation component and Migrate to the Navigation component.
¶ Navigation의 3대 컴포넌트
-
Navigation graph
-
Navigation host
-
Navigation controller
¶ Navigation graph
ref) https://android-developers.googleblog.com/2018/05/android-studio-3-2-canary.html
¶ Navigation host
<androidx.fragment.app.FragmentContainerView
android:id="@+id/nav_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="androidx.navigation.fragment.NavHostFragment"
app:defaultNavHost="true"
app:navGraph="@navigation/mobile_navigation"/>
¶ Navigation controller
// Fragment
val navController = findNavController()
// Activity
val navHostFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment
val navController = navHostFragment.navController
¶ Safe Args를 사용하여 프래그먼트간 데이터 전달하기
| Type | app:argType syntax | Support for default values | Handled by routes | Nullable |
|---|---|---|---|---|
| Integer | app:argType="integer" | Yes | Yes | No |
| Float | app:argType="float" | Yes | Yes | No |
| Long | app:argType="long" | Yes - Default values must always end with an 'L' suffix (e.g. "123L"). | Yes | No |
| Boolean | app:argType="boolean" | Yes - "true" or "false" | Yes | No |
| String | app:argType="string" | Yes | Yes | Yes |
| Resource Reference | app:argType="reference" | Yes - Default values must be in the form of "@resourceType/resourceName" (e.g. "@style/myCustomStyle") or "0" | Yes | No |
| Custom Parcelable | app:argType=<type>, where <type> is the fully-qualified class name of the Parcelable |
Supports a default value of "@null". Does not support other default values. | No | Yes |
| Custom Serializable | app:argType=<type>, where <type> is the fully-qualified class name of the Serializable |
Supports a default value of "@null". Does not support other default values. | No | Yes |
| Custom Enum | app:argType=<type>, where <type> is the fully-qualified name of the enum |
Yes - Default values must match the unqualified name (e.g. "SUCCESS" to match MyEnum.SUCCESS). | No | No |
¶ Safe Args를 사용하여 프래그먼트간 데이터 전달하기
- 내비게이션의
action이 시작되는 대상의 이름에Directions라는 접미어가 붙은 클래스 argument를 전달하는데 사용한action의 이름과 동일한 이름의 클래스- 데이터를 수신하는 대상의 이름에
Args라는 접미어가 붙은 클래스
override fun onClick(v: View) {
val amountTv: EditText = view!!.findViewById(R.id.editTextAmount)
val amount = amountTv.text.toString().toInt()
val action = SpecifyAmountFragmentDirections.confirmationAction(amount)
v.findNavController().navigate(action)
}