feat: add image picker from gallery for android

@@ -4,6 +4,7 @@ import android.Manifest
 import android.app.Activity
 import android.content.pm.PackageManager
 import android.graphics.Point
+import android.net.Uri
 import android.util.Log
 import android.util.Size
 import android.view.Surface
@@ -22,6 +23,8 @@ import io.flutter.plugin.common.MethodCall
 import io.flutter.plugin.common.MethodChannel
 import io.flutter.plugin.common.PluginRegistry
 import io.flutter.view.TextureRegistry
+import java.io.File
+import java.net.URI
 
 
 class MobileScanner(private val activity: Activity, private val textureRegistry: TextureRegistry)
@@ -50,6 +53,7 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
             "torch" -> switchTorch(call, result)
             "analyze" -> switchAnalyzeMode(call, result)
             "stop" -> stop(result)
+            "analyzeImage" -> analyzeImage(call, result)
             else -> result.notImplemented()
         }
     }
@@ -197,6 +201,23 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
         result.success(null)
     }
 
+    private fun analyzeImage(call: MethodCall, result: MethodChannel.Result) {
+        val uri = Uri.fromFile( File(call.arguments.toString()))
+        val inputImage = InputImage.fromFilePath(activity, uri)
+
+        scanner.process(inputImage)
+            .addOnSuccessListener { barcodes ->
+                for (barcode in barcodes) {
+                    val event = mapOf("name" to "barcode", "data" to barcode.data)
+                    sink?.success(event)
+                }
+            }
+            .addOnFailureListener { e -> Log.e(TAG, e.message, e)
+                result.error(TAG, e.message, e)}
+            .addOnCompleteListener { result.success(null) }
+
+    }
+
     private fun stop(result: MethodChannel.Result) {
         val owner = activity as LifecycleOwner
         camera!!.cameraInfo.torchState.removeObservers(owner)

 import 'package:flutter/material.dart';
+import 'package:image_picker/image_picker.dart';
 import 'package:mobile_scanner/mobile_scanner.dart';
 
 void main() {
@@ -73,7 +74,7 @@ class _AnalyzeViewState extends State<AnalyzeView>
                       ),
                       Center(
                         child: SizedBox(
-                          width: MediaQuery.of(context).size.width - 120,
+                          width: MediaQuery.of(context).size.width - 180,
                           height: 50,
                           child: FittedBox(
                             child: Text(
@@ -103,6 +104,19 @@ class _AnalyzeViewState extends State<AnalyzeView>
                         iconSize: 32.0,
                         onPressed: () => controller.switchCamera(),
                       ),
+                      IconButton(
+                        color: Colors.white,
+                        icon: Icon(Icons.browse_gallery),
+                        iconSize: 32.0,
+                        onPressed: () async {
+                          final ImagePicker _picker = ImagePicker();
+                          // Pick an image
+                          final XFile? image = await _picker.pickImage(source: ImageSource.gallery);
+                          if (image != null) {
+                            controller.analyzeImage(image.path);
+                          }
+                        },
+                      ),
                     ],
                   ),
                 ),

@@ -6,6 +6,7 @@ environment:
   sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
+  image_picker: ^0.8.4+9
   flutter:
     sdk: flutter
 

@@ -170,6 +170,10 @@ class MobileScannerController {
     start();
   }
 
+  Future<void> analyzeImage(dynamic path) async {
+    await methodChannel.invokeMethod('analyzeImage', path);
+  }
+
   /// Disposes the controller and closes all listeners.
   void dispose() {
     if (hashCode == _controllerHashcode) {