info: check prop exists before querying owner package

android/app/src/main/kotlin/deckers/thibault/aves/channel/calls/MetadataHandler.kt

@@ -5,6 +5,7 @@ import android.content.Context
 import android.database.Cursor
 import android.media.MediaMetadataRetriever
 import android.net.Uri
+import android.os.Build
 import android.provider.MediaStore
 import android.util.Log
 import androidx.exifinterface.media.ExifInterface
@@ -77,6 +78,7 @@ class MetadataHandler(private val context: Context) : MethodCallHandler {
             "getOverlayMetadata" -> GlobalScope.launch(Dispatchers.IO) { safe(call, result, ::getOverlayMetadata) }
             "getMultiPageInfo" -> GlobalScope.launch(Dispatchers.IO) { safe(call, result, ::getMultiPageInfo) }
             "getPanoramaInfo" -> GlobalScope.launch(Dispatchers.IO) { safe(call, result, ::getPanoramaInfo) }
+            "hasContentResolverProp" -> GlobalScope.launch(Dispatchers.IO) { safe(call, result, ::hasContentResolverProp) }
             "getContentResolverProp" -> GlobalScope.launch(Dispatchers.IO) { safe(call, result, ::getContentResolverProp) }
             else -> result.notImplemented()
         }
@@ -681,6 +683,24 @@ class MetadataHandler(private val context: Context) : MethodCallHandler {
         result.error("getPanoramaInfo-empty", "failed to read XMP from uri=$uri", null)
     }
 
+    private fun hasContentResolverProp(call: MethodCall, result: MethodChannel.Result) {
+        val prop = call.argument<String>("prop")
+        if (prop == null) {
+            result.error("hasContentResolverProp-args", "failed because of missing arguments", null)
+            return
+        }
+
+        result.success(
+            when (prop) {
+                "owner_package_name" -> Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q
+                else -> {
+                    result.error("hasContentResolverProp-unknown", "unknown property=$prop", null)
+                    return
+                }
+            }
+        )
+    }
+
     private fun getContentResolverProp(call: MethodCall, result: MethodChannel.Result) {
         val mimeType = call.argument<String>("mimeType")
         val uri = call.argument<String>("uri")?.let { Uri.parse(it) }

lib/services/app_shortcut_service.dart

@@ -13,9 +13,7 @@ class AppShortcutService {
   static bool? _canPin;
 
   static Future<bool> canPin() async {
-    if (_canPin != null) {
-      return SynchronousFuture(_canPin!);
-    }
+    if (_canPin != null) return SynchronousFuture(_canPin!);
 
     try {
       final result = await platform.invokeMethod('canPin');

lib/services/metadata_service.dart

@@ -4,6 +4,7 @@ import 'package:aves/model/multipage.dart';
 import 'package:aves/model/panorama.dart';
 import 'package:aves/services/service_policy.dart';
 import 'package:aves/services/services.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 
 abstract class MetadataService {
@@ -18,6 +19,8 @@ abstract class MetadataService {
 
   Future<PanoramaInfo?> getPanoramaInfo(AvesEntry entry);
 
+  Future<bool> hasContentResolverProp(String prop);
+
   Future<String?> getContentResolverProp(AvesEntry entry, String prop);
 }
 
@@ -137,6 +140,25 @@ class PlatformMetadataService implements MetadataService {
     return null;
   }
 
+  final Map<String, bool> _contentResolverProps = {};
+
+  @override
+  Future<bool> hasContentResolverProp(String prop) async {
+    var exists = _contentResolverProps[prop];
+    if (exists != null) return SynchronousFuture(exists);
+
+    try {
+      exists = await platform.invokeMethod('hasContentResolverProp', <String, dynamic>{
+        'prop': prop,
+      });
+    } on PlatformException catch (e, stack) {
+      await reportService.recordError(e, stack);
+    }
+    exists ??= false;
+    _contentResolverProps[prop] = exists;
+    return exists;
+  }
+
   @override
   Future<String?> getContentResolverProp(AvesEntry entry, String prop) async {
     try {

lib/widgets/viewer/info/basic_section.dart

@@ -135,6 +135,7 @@ class _OwnerPropState extends State<OwnerProp> {
 
   AvesEntry get entry => widget.entry;
 
+  static const ownerPackageNamePropKey = 'owner_package_name';
   static const iconSize = 20.0;
 
   @override
@@ -142,7 +143,9 @@ class _OwnerPropState extends State<OwnerProp> {
     super.initState();
     final isMediaContent = entry.uri.startsWith('content://media/external/');
     if (isMediaContent) {
-      _ownerPackageFuture = metadataService.getContentResolverProp(entry, 'owner_package_name');
+      _ownerPackageFuture = metadataService.hasContentResolverProp(ownerPackageNamePropKey).then((exists) {
+        return exists ? metadataService.getContentResolverProp(entry, ownerPackageNamePropKey) : SynchronousFuture(null);
+      });
     } else {
       _ownerPackageFuture = SynchronousFuture(null);
     }