I used tflite and imagepicker in my app for using tensorflow lite to differentiate between cat and dog. Now, this exception keeps coming up whenever i pick image from gallery, after picking an image, I should get an output, telling me wheather it's a cat or dog, but i get nothing and return back to previous screen with an exceprion. Please help me out.
Here's the code -
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:tflite/tflite.dart';
class Home extends StatefulWidget {
@override
_HomeState createState() => _HomeState();
}
class _HomeState extends State<Home> {
bool _isLoading=true;
File _image = File("");
List _output = [];
final picker = ImagePicker();
@override
void initState() {
super.initState();
loadModel().then((value) {
setState(() {
});
});
}
detectImage(File image) async {
var output = await Tflite.runModelOnImage(
path: image.path,
numResults: 2,
threshold: 0.6,
imageMean: 127.5,
imageStd: 127.5,
);
setState(() {
_output.add(output);
_isLoading = false;
});
output!=null ? output.clear() : null;
}
loadModel() async {
await Tflite.loadModel(
model: 'assets/model_unquant.tflite',
labels: 'assets/labels.txt',
);
}
@override
void dispose() {
// TODO: implement dispose
super.dispose();
}
pickImage() async {
var image = await picker.getImage(source: ImageSource.camera);
if(image == null)
return null;
setState(() {
_image = File(image.path);
});
detectImage(_image);
}
pickGalleryImage() async {
var image = await picker.getImage(source: ImageSource.gallery);
if(image == null)
return null;
setState(() {
_image = File(image.path);
});
detectImage(_image);
}
@override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
backgroundColor: Colors.grey[400],
body: Center(
child: Container(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
SizedBox(height: 20.0,),
Center(
child: Text(
'Cats and Dogs Detector app',
style: TextStyle(
fontSize: 25.0,
fontWeight: FontWeight.bold,
color: Colors.white70,
),
),
),
SizedBox(height: 200.0),
Center(
child: _isLoading ? Container(
width: MediaQuery.of(context).size.width*0.9,
child: Column(
children: [
Image.asset("assets/cats n dogs 2.jpg", fit: BoxFit.cover,)
],
),
) : Container(
child: Column(
children: [
Container(
height: 250,
child: Image.file(_image),
),
SizedBox(height: 20.0,),
_output!=null ? Text('${_output[0]['label']}', style: TextStyle(color: Colors.white, fontSize: 15.0),) : Container(),
SizedBox(height: 10.0,),
],
),
),
),
SizedBox(
height: 20.0,
),
Center(
child: Container(
width: MediaQuery.of(context).size.width*0.6,
alignment: Alignment.center,
child: Column(
children: [
ElevatedButton(
onPressed: () {
pickImage();
},
style: ButtonStyle(
backgroundColor: MaterialStateProperty.all(Colors.grey),
),
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 30, vertical: 15.0),
child: Text(
'Capture a pic',
style: TextStyle(
color: Colors.white,
fontSize: 17.5,
),
),
),
),
SizedBox(
height: MediaQuery.of(context).size.height*0.01,
),
ElevatedButton(
onPressed: () {
pickGalleryImage();
},
style: ButtonStyle(
backgroundColor: MaterialStateProperty.all(Colors.grey),
),
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 12.0, vertical: 15.0),
child: Text(
'Select from gallery',
style: TextStyle(
color: Colors.white,
fontSize: 17.50,
),
),
),
),
],
),
),
),
],
),
),
),
),
);
}
}
Here is the exception -
Performing hot restart...
Syncing files to device sdk gphone x86 arm...
Restarted application in 1,187ms.
E/flutter ( 7687): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: PlatformException(Failed to run model, Interpreter busy, java.lang.RuntimeException: Interpreter busy
E/flutter ( 7687): at sq.flutter.tflite.TflitePlugin$TfliteTask.<init>(TflitePlugin.java:450)
E/flutter ( 7687): at sq.flutter.tflite.TflitePlugin$RunModelOnImage.<init>(TflitePlugin.java:488)
E/flutter ( 7687): at sq.flutter.tflite.TflitePlugin.onMethodCall(TflitePlugin.java:105)
E/flutter ( 7687): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233)
E/flutter ( 7687): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:85)
E/flutter ( 7687): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:818)
E/flutter ( 7687): at android.os.MessageQueue.nativePollOnce(Native Method)
E/flutter ( 7687): at android.os.MessageQueue.next(MessageQueue.java:335)
E/flutter ( 7687): at android.os.Looper.loop(Looper.java:183)
E/flutter ( 7687): at android.app.ActivityThread.main(ActivityThread.java:7656)
E/flutter ( 7687): at java.lang.reflect.Method.invoke(Native Method)
E/flutter ( 7687): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
E/flutter ( 7687): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
E/flutter ( 7687): , null)
E/flutter ( 7687): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:597:7)
E/flutter ( 7687): #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:158:18)
E/flutter ( 7687): <asynchronous suspension>
E/flutter ( 7687): #2 Tflite.runModelOnImage (package:tflite/tflite.dart:34:12)
E/flutter ( 7687): <asynchronous suspension>
E/flutter ( 7687): #3 _HomeState.detectImage (package:dog_cat_classification/home.dart:30:18)
E/flutter ( 7687): <asynchronous suspension>
E/flutter ( 7687):
Instead of hot reload/hot restart, stop and run the session again.