如何使用导航组件切换到不同后堆栈中的其他片段?

问题描述

我有3个底部导航选项卡，称为Home, Dashboard, Profile.

I have 3 bottom navigation tabs called Home, Dashboard, Profile.

• 在Home中，我有Fragment1和Fragment2，
• 在Dashboard中，我有Fragment3和Fragment4
• 在Profile中，我有MyProfile和EditProfile.

• In Home, I have Fragment1 and Fragment2,
• In Dashboard, I have Fragment3 and Fragment4
• And in Profile, I have MyProfile and EditProfile.

现在，在Fragment2中，按钮changeAvatar可以打开堆栈Profile中的EditProfile.因为EditProfile应该在选项卡Profile中，所以如果我不想在Home的navGraph中包含EditProfile，我该如何实现这种行为?

Now, in Fragment2, a button changeAvatar can open EditProfile in stack Profile. Because EditProfile should be in tab Profile, so if I don't want to include EditProfile into navGraph of Home, how can I achieve that behavior?

推荐答案

要从主页> Fragment2 导航到 Profile> EditProfile ，您可以使用Navigation.

To navigate from Home > Fragment2 to Profile > EditProfile you can pass an id by edit type using Navigation.

private fun navigateToEditProfileAvatar() {
    buttonEditProfileAvatar.setOnClickListener { button ->
        Navigation.findNavController(button).navigate(
                R.id.action_global_to_edit_profile,
                RootNavigationDirections.actionGlobalToEditProfile(
                        editType = EditType.EDIT_PROFILE_AVATAR.id
                ).arguments
        )
    }
}

EditProfileFragment.kt

override fun onActivityCreated(savedInstanceState: Bundle?) {
    super.onActivityCreated(savedInstanceState)

    ...

    viewModel.setEditTypeId(EditProfileFragmentArgs.fromBundle(arguments ?: Bundle()).editType)

}

private fun bind() {
    when (viewModel.editTypeId) {
         EditType.EDIT_PROFILE.id -> { ... }
         EditType.EDIT_PROFILE_AVATAR.id -> {
             // here
         }
    }
}

EditProfileVM.kt

val editTypeId = MutableLiveData<String>()
fun setEditTypeId(id: editTypeId ) {...}

res/navigation/root_navigation.xml

<action
    android:id="@+id/action_global_to_edit_profile"
    app:destination="@id/edit_profile_fragment" />

<fragment
    android:id="@+id/edit_profile_fragment"
    android:name="EditProfileFragment"
    android:label=" "
    tools:layout="@layout/fragment_edit_profile">

    <argument
        android:name="editType"
        app:argType="string"
        android:defaultValue="@string/edit_profile"
    />

</fragment>

EditType.kt

enum class EditType(val id: String) {
    EDIT_PROFILE("EDIT_PROFILE"), EDIT_PROFILE_AVATAR("EDIT_PROFILE_AVATAR");
}

注意:导航的参数不能为枚举类型

Note: The arguments of a navigation cannot be of type Enum

GL

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