导航控制器和广播接收器

Question

我当前在BroadcastReceiver上下文中查找NavigationController实例时遇到问题。当我从Fragment中的任何其他地方调用findNavigationController()时，它的导航没有任何问题，但当我在onReceive的上下文中调用它时，应用程序崩溃，出现以下异常

Caused by: java.lang.IllegalArgumentException: navigation destination app.eventcloud.events:id/action_documents_list_fragment_to_document_viewer_fragment is unknown to this NavController
at androidx.navigation.NavController.navigate(NavController.java:633)
at androidx.navigation.NavController.navigate(NavController.java:592)
at app.eventcloud.root.gui.screens.knowledgehub.DocumentsListFragment.handleDownloadCompleted(DocumentsListFragment.kt:97)
at app.eventcloud.root.gui.screens.knowledgehub.DocumentsListFragment.access$handleDownloadCompleted(DocumentsListFragment.kt:26)
at app.eventcloud.root.gui.screens.knowledgehub.DocumentsListFragment$receiver$1.onReceive(DocumentsListFragment.kt:143)
at android.app.LoadedApk$ReceiverDispatcher$Args.lambda$getRunnable$0(LoadedApk.java:1391)
at android.app.-$$Lambda$LoadedApk$ReceiverDispatcher$Args$_BumDX2UKsnxLVrE6UJsJZkotuA.run(Unknown Source:2) 
at android.os.Handler.handleCallback(Handler.java:873) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:193) 
at android.app.ActivityThread.main(ActivityThread.java:6669) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 

导致此问题的代码如下。

private val receiver: BroadcastReceiver = object : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
val action = intent.action
if (DownloadManager.ACTION_DOWNLOAD_COMPLETE == action) {
...
val filePath = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI))
val bundle = Bundle()
bundle.putString("file_path", filePath)
findNavController().navigate(R.id.action_documents_list_fragment_to_document_viewer_fragment, bundle)
...
}
}
}

我已经尝试过从BroadcastReceiver之外的上下文获取NavigationController，但我仍然有同样的问题。有什么想法吗？

Answer 1

我最终所做的是在文档中创建类似的深度链接https://developer.android.com/topic/libraries/architecture/navigation/navigation-implementing#Deeplink

然后使用配置的深度链接启动活动

val deepLinkIntent = Intent(Intent.ACTION_VIEW)
deepLinkIntent.data = Uri.parse("epix://downloads/$filePath")
context.startActivity(deepLinkIntent)

还可以查看此代码实验室部件https://codelabs.developers.google.com/codelabs/android-navigation/#10