Guide users to notification listener access

app/src/main/java/se/ajpanton/notificationlog/ViewLogsFragment.kt

@@ -1,6 +1,9 @@
 package se.ajpanton.notificationlog
 
 import android.os.Bundle
+import android.content.ComponentName
+import android.content.Intent
+import android.provider.Settings
 import android.view.View
 import android.widget.TextView
 import androidx.fragment.app.Fragment
@@ -11,6 +14,7 @@ import se.ajpanton.notificationlog.model.NotificationLogEntry
 import se.ajpanton.notificationlog.settings.LogField
 import se.ajpanton.notificationlog.settings.LogViewSettingsStore
 import se.ajpanton.notificationlog.settings.TimestampZone
+import se.ajpanton.notificationlog.capture.NotificationCaptureService
 import java.text.DateFormat
 import java.util.Date
 
@@ -20,6 +24,9 @@ class ViewLogsFragment : Fragment(R.layout.fragment_view_logs) {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
         binding = FragmentViewLogsBinding.bind(view)
+        binding!!.notificationAccess.setOnClickListener {
+            startActivity(Intent(Settings.ACTION_NOTIFICATION_LISTENER_SETTINGS))
+        }
         binding!!.clearLogs.setOnClickListener {
             MaterialAlertDialogBuilder(requireContext())
                 .setTitle("Clear logs?")
@@ -34,6 +41,15 @@ class ViewLogsFragment : Fragment(R.layout.fragment_view_logs) {
         loadLogs()
     }
 
+    override fun onResume() {
+        super.onResume()
+        binding?.notificationAccess?.text = if (isListenerEnabled()) {
+            "Notification access enabled"
+        } else {
+            "Enable notification access"
+        }
+    }
+
     override fun onDestroyView() { binding = null; super.onDestroyView() }
 
     private fun loadLogs() {
@@ -67,4 +83,11 @@ class ViewLogsFragment : Fragment(R.layout.fragment_view_logs) {
         if (zone == TimestampZone.UTC) format.timeZone = java.util.TimeZone.getTimeZone("UTC")
         return format.format(Date(value))
     }
+
+    private fun isListenerEnabled(): Boolean {
+        val manager = requireContext().getSystemService(android.app.NotificationManager::class.java)
+        return manager.isNotificationListenerAccessGranted(
+            ComponentName(requireContext(), NotificationCaptureService::class.java),
+        )
+    }
 }