新增對新目的地類型的支援
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
NavController
類型仰賴一個或多個 Navigator
物件來執行導覽作業。根據預設,NavController
支援使用 ActivityNavigator
類別及其巢狀 ActivityNavigator.Destination
類別前往其他活動,以退出導覽圖表。
如要前往任何其他類型的目的地,必須在 NavController
中新增一個或多個 Navigator
物件。舉例來說,使用片段做為目的地時,NavHostFragment
會自動新增 FragmentNavigator
類別至其 NavController
。
如要將新的 Navigator
新增至 NavController
,請使用 getNavigatorProvider()
方法,然後使用 addNavigator()
方法。
以下程式碼示範如何在 NavController
中新增 CustomNavigator
物件:
Kotlin
val customNavigator = CustomNavigator()
navController.navigatorProvider += customNavigator
Java
CustomNavigator customNavigator = new CustomNavigator();
navController.getNavigatorProvider().addNavigator(customNavigator);
大部分的 Navigator
類別都有巢狀目的地子類別。這個子類別可用來指定目的地專屬的其他屬性。如要進一步瞭解目的地子類別,請參閱適用 Navigator
類別的參考文件。
其他資源
如要進一步瞭解導覽,請參閱下列其他資源。
程式碼研究室
影片
這個頁面中的內容和程式碼範例均受《內容授權》中的授權所規範。Java 與 OpenJDK 是 Oracle 和/或其關係企業的商標或註冊商標。
上次更新時間:2025-07-27 (世界標準時間)。
[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["缺少我需要的資訊","missingTheInformationINeed","thumb-down"],["過於複雜/步驟過多","tooComplicatedTooManySteps","thumb-down"],["過時","outOfDate","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["示例/程式碼問題","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間:2025-07-27 (世界標準時間)。"],[],[],null,["# Add support for new destination types\n\nThe [`NavController`](/reference/androidx/navigation/NavController) type\nrelies on one or more\n[`Navigator`](/reference/androidx/navigation/Navigator) objects to perform\nthe navigation operation. By default, `NavController` supports leaving the\nnavigation graph by navigating to another activity using the\n[`ActivityNavigator`](/reference/androidx/navigation/ActivityNavigator)\nclass and its nested\n[`ActivityNavigator.Destination`](/reference/androidx/navigation/ActivityNavigator.Destination)\nclass.\n\nTo navigate to any other type of destination, one or more additional `Navigator`\nobjects must be added to the `NavController`. For example, when using fragments\nas destinations, the\n[`NavHostFragment`](/reference/androidx/navigation/fragment/NavHostFragment)\nautomatically adds the\n[`FragmentNavigator`](/reference/androidx/navigation/fragment/FragmentNavigator)\nclass to its `NavController`.\n\nTo add a new `Navigator` object to a `NavController`, use the\n[`getNavigatorProvider()`](/reference/androidx/navigation/NavController#getNavigatorProvider())\nmethod, followed by the\n[`addNavigator()`](/reference/androidx/navigation/NavigatorProvider#addNavigator(androidx.navigation.Navigator))\nmethod.\n\nThe following code shows an example of adding a `CustomNavigator` object to a\n`NavController`: \n\n### Kotlin\n\n```kotlin\nval customNavigator = CustomNavigator()\nnavController.navigatorProvider += customNavigator\n```\n\n### Java\n\n```java\nCustomNavigator customNavigator = new CustomNavigator();\nnavController.getNavigatorProvider().addNavigator(customNavigator);\n```\n\nMost `Navigator` classes have a nested destination subclass. This subclass can\nbe used to specify additional attributes unique to your destination. For more\ninformation about destination subclasses, see the reference documentation for\nthe appropriate [`Navigator`](/reference/androidx/navigation/Navigator)\nclass.\n\nAdditional resources\n--------------------\n\nTo learn more about navigation, see the following\nadditional resources.\n\n\u003cbr /\u003e\n\n### Codelabs\n\n\u003cbr /\u003e\n\n- [Learn Jetpack Navigation codelab](https://codelabs.developers.google.com/codelabs/android-navigation/index.html?index=..%2F..%2Findex#0)\n\n\u003cbr /\u003e\n\n### Videos\n\n\u003cbr /\u003e\n\n- [Android Jetpack: Manage UI navigation with Navigation Controller](https://www.youtube.com/watch?v=8GCXtCjtg40)"]]