RangeError

[plentypvp]

ℹ️ Info

Version 0.14.1

💬 Description

PS D:\FlutterProj\talalaeva> flutter pub run flutter_launcher_icons
Deprecated. Use dart run instead.
════════════════════════════════════════════
FLUTTER LAUNCHER ICONS (v0.14.1)
════════════════════════════════════════════

• Creating default icons Android
• Adding a new Android launcher icon
• Creating mipmap xml file Android

✕ Could not generate launcher icons
RangeError (length): Invalid value: Not in inclusive range 0..863: 1020

📜 Pubspec.yaml

flutter_launcher_icons:
android: "launcher_icon"
ios: true
image_path: "assets/mainicon.png"
image_path_ios: "assets/mainicon.png"
remove_alpha_ios: true

[plentypvp]

RangeError (length): Invalid value: Not in inclusive range 0..863: 1020
#0 Uint8List.[] (dart:typed_data-patch/typed_data_patch.dart)
#1 PaletteUint8.get (package:image/src/image/palette_uint8.dart:66:35)
#2 PixelUint8.get (package:image/src/image/pixel_uint8.dart:125:18)
#3 PixelUint8.[] (package:image/src/image/pixel_uint8.dart:131:30)
#4 _convertColor (package:image/src/util/color_util.dart:44:36)
#5 convertColor (package:image/src/util/color_util.dart:91:14)
#6 Image.convert (package:image/src/image/image.dart:905:11)
#7 createIcons (package:flutter_launcher_icons/ios.dart:125:19)
#8 createIconsFromConfig (package:flutter_launcher_icons/main.dart:158:24)
#9 createIconsFromArguments (package:flutter_launcher_icons/main.dart:90:13)
#10 main (file:///D:/FlutterProj/talalaeva/mypkg/bin/flutter_launcher_icons.dart:7:26)
#11 _delayEntrypointInvocation. (dart:isolate-patch/isolate_patch.dart:295:33)
#12 _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:184:12)

[plentypvp]

My icon was 1081x1081 PNG image with Indexed color. The problem resolved after converting that to RGB using GIMP.

[mrohlof-protofy]

We added the image during the build process and did not have the option to change it by hand. Here is my python solution:

$ pip install pillow

from PIL import Image

indexed_image = Image.open(img)
rgb_image = indexed_image.convert('RGB')
rgb_image.save(img)