flutter_image_quality 0.0.2

flutter_image_quality: ^0.0.2 copied to clipboard

example/lib/main.dart

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter_image_quality/flutter_image_quality.dart';
import 'package:image_picker/image_picker.dart';

void main() {
  runApp(const ImageQualityExampleApp());
}

class ImageQualityExampleApp extends StatelessWidget {
  const ImageQualityExampleApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Image Quality',
      theme: ThemeData(
        useMaterial3: true,
      ),
      home: const ImageQualityHomePage(),
    );
  }
}

class ImageQualityHomePage extends StatefulWidget {
  const ImageQualityHomePage({super.key});

  @override
  State<ImageQualityHomePage> createState() => _ImageQualityHomePageState();
}

class _ImageQualityHomePageState
    extends State<ImageQualityHomePage> {
  File? selectedImage;

  ImageQualityResult? qualityResult;

  CompressedImageResult? compressionResult;

  bool analyzing = false;
  bool compressing = false;

  Future<void> pickImage() async {
    final picker = ImagePicker();

    final result = await picker.pickImage(
      source: ImageSource.gallery,
    );

    if (result == null) {
      return;
    }

    setState(() {
      selectedImage = File(result.path);
      qualityResult = null;
      compressionResult = null;
    });
  }

  Future<void> analyzeImage() async {
    final file = selectedImage;

    if (file == null) {
      return;
    }

    setState(() {
      analyzing = true;
    });

    try {
      final result =
      await FlutterImageQuality.analyze(
        file,
      );

      if (!mounted) {
        return;
      }

      setState(() {
        qualityResult = result;
      });
    } finally {
      if (mounted) {
        setState(() {
          analyzing = false;
        });
      }
    }
  }

  Future<void> compressImage() async {
    final file = selectedImage;

    if (file == null) {
      return;
    }

    setState(() {
      compressing = true;
    });

    try {
      final result = await FlutterImageQuality.compress(
        file,
        maxSizeKB: 500,
      );
      debugPrint("======= Result ========");
      debugPrint("${result.bytes }");

      if (!mounted) {
        return;
      }

      setState(() {
        compressionResult = result;
      });
    } finally {
      if (mounted) {
        setState(() {
          compressing = false;
        });
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text(
          'Flutter Image Quality',
        ),
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(20),
        child: Column(
          crossAxisAlignment:
          CrossAxisAlignment.stretch,
          children: [
            ElevatedButton.icon(
              onPressed: pickImage,
              icon: const Icon(
                Icons.photo_library,
              ),
              label: const Text(
                'Select Image',
              ),
            ),

            const SizedBox(height: 20),

            if (selectedImage != null)
              ClipRRect(
                borderRadius:
                BorderRadius.circular(16),
                child: Image.file(
                  selectedImage!,
                  height: 300,
                  fit: BoxFit.contain,
                ),
              ),

            if (selectedImage != null) ...[
              const SizedBox(height: 20),

              FilledButton.icon(
                onPressed:
                analyzing ? null : analyzeImage,
                icon: const Icon(
                  Icons.analytics,
                ),
                label: Text(
                  analyzing
                      ? 'Analyzing...'
                      : 'Analyze Image',
                ),
              ),

              const SizedBox(height: 10),

              FilledButton.icon(
                onPressed:
                compressing
                    ? null
                    : compressImage,
                icon: const Icon(
                  Icons.compress,
                ),
                label: Text(
                  compressing
                      ? 'Compressing...'
                      : 'Compress to 500 KB',
                ),
              ),
            ],

            if (qualityResult != null) ...[
              const SizedBox(height: 25),
              _QualityCard(
                result: qualityResult!,
              ),
            ],

            if (compressionResult != null) ...[
              const SizedBox(height: 20),
              _CompressionCard(
                result: compressionResult!,
              ),
            ],
          ],
        ),
      ),
    );
  }
}

class _QualityCard extends StatelessWidget {
  final ImageQualityResult result;

  const _QualityCard({
    required this.result,
  });

  @override
  Widget build(BuildContext context) {
    return Card(
      child: Padding(
        padding: const EdgeInsets.all(18),
        child: Column(
          crossAxisAlignment:
          CrossAxisAlignment.start,
          children: [
            const Text(
              'Image Quality',
              style: TextStyle(
                fontSize: 20,
                fontWeight: FontWeight.bold,
              ),
            ),

            const SizedBox(height: 15),

            Text(
              'Blur Score: '
                  '${result.blurScore.toStringAsFixed(2)}',
            ),

            Text(
              'Brightness: '
                  '${result.brightness.toStringAsFixed(2)}',
            ),

            const SizedBox(height: 12),

            _ResultRow(
              title: 'Blurred',
              value: result.isBlurred,
            ),

            _ResultRow(
              title: 'Too Dark',
              value: result.isTooDark,
            ),

            _ResultRow(
              title: 'Too Bright',
              value: result.isTooBright,
            ),
          ],
        ),
      ),
    );
  }
}

class _CompressionCard extends StatelessWidget {
  final CompressedImageResult result;

  const _CompressionCard({
    required this.result,
  });

  @override
  Widget build(BuildContext context) {
    return Card(
      child: Padding(
        padding: const EdgeInsets.all(18),
        child: Column(
          crossAxisAlignment:
          CrossAxisAlignment.start,
          children: [
            const Text(
              'Compression',
              style: TextStyle(
                fontSize: 20,
                fontWeight: FontWeight.bold,
              ),
            ),

            const SizedBox(height: 15),

            Text(
              'Original: '
                  '${_formatBytes(result.originalSize)}',
            ),

            Text(
              'Compressed: '
                  '${_formatBytes(result.compressedSize)}',
            ),

            Text(
              'JPEG Quality: '
                  '${result.quality}',
            ),

            Text(
              'Reduction: '
                  '${result.compressionPercentage.toStringAsFixed(1)}%',
            ),
          ],
        ),
      ),
    );
  }

  String _formatBytes(int bytes) {
    if (bytes < 1024) {
      return '$bytes B';
    }

    if (bytes < 1024 * 1024) {
      return '${(bytes / 1024).toStringAsFixed(1)} KB';
    }

    return '${(bytes / (1024 * 1024)).toStringAsFixed(2)} MB';
  }
}

class _ResultRow extends StatelessWidget {
  final String title;
  final bool value;

  const _ResultRow({
    required this.title,
    required this.value,
  });

  @override
  Widget build(BuildContext context) {
    return Row(
      children: [
        Icon(
          value
              ? Icons.cancel
              : Icons.check_circle,
        ),
        const SizedBox(width: 8),
        Text('$title: ${value ? "Yes" : "No"}'),
      ],
    );
  }
}