feat: improve notification permission request

app-common/src/main/java/im/angry/openeuicc/ui/MainActivity.kt

@@ -1,6 +1,7 @@
 package im.angry.openeuicc.ui
 
 import android.annotation.SuppressLint
+import android.app.AlertDialog
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
@@ -130,7 +131,18 @@ open class MainActivity : BaseEuiccAccessActivity(), OpenEuiccContextMarker {
     private fun ensureNotificationPermissions() {
         val permission = android.Manifest.permission.POST_NOTIFICATIONS
         if (checkSelfPermission(permission) == PackageManager.PERMISSION_GRANTED) return
-        requestPermissions(arrayOf(permission), PERMISSION_REQUEST_CODE)
+        if (!shouldShowRequestPermissionRationale(permission)) {
+            requestPermissions(arrayOf(permission), PERMISSION_REQUEST_CODE)
+            return
+        }
+        AlertDialog.Builder(this)
+            .setTitle(R.string.notification_permission_request_title)
+            .setMessage(R.string.notification_permission_request_desc)
+            .setPositiveButton(android.R.string.ok) { _, _ ->
+                requestPermissions(arrayOf(permission), PERMISSION_REQUEST_CODE)
+            }
+            .create()
+            .show()
     }
 
     private suspend fun init(fromUsbEvent: Boolean = false) {

app-common/src/main/res/values/strings.xml

@@ -5,6 +5,9 @@
 
     <string name="notification_help">Help</string>
 
+    <string name="notification_permission_request_title">Notification Permission Needed</string>
+    <string name="notification_permission_request_desc">During the download process, notification permissions are required so that the app does not need to stay in the foreground</string>
+
     <string name="profile_reload_slots">Reload Slots</string>
     <string name="profile_no_enabled_profile">Unknown</string>