flutter 选择图片并裁剪上传头像功能

1、引用 选择图片库

image_picker: ^0.6.3+1

//选择照片

Utils.showChoose(context, "选择照片来源", photoArray, (int position) async {

var image = await ImagePicker.pickImage(source: position==0 ? ImageSource.camera : ImageSource.gallery);

2、引用图片裁剪库

image_cropper: ^1.2.1

//裁剪照片

File croppedFile = await ImageCropper.cropImage(

sourcePath: image.path,

maxWidth: 300,

maxHeight: 300,

aspectRatioPresets: [

CropAspectRatioPreset.square

],

androidUiSettings: AndroidUiSettings(

toolbarTitle: '裁剪',

toolbarColor: Colors.white,

toolbarWidgetColor: MyColors.blue,

initAspectRatio: CropAspectRatioPreset.square,

lockAspectRatio: true),

iosUiSettings: IOSUiSettings(

minimumAspectRatio: 1.0,

)

);

获取到裁剪后的照片后调用上传接口即可。

编译运行报错 程序包androidx.lifecycle不存在。

这个问题是Androidx引用库兼容问题。找到/android/app/build.gradle 在最后增加如下代码即可

configurations.all {

resolutionStrategy {

resolutionStrategy.eachDependency { details ->

if (details.requested.group == 'androidx.core') {

details.useVersion "1.0.2"

}

if (details.requested.group == 'androidx.lifecycle') {

details.useVersion "2.0.0"

}

if (details.requested.group == 'androidx.versionedparcelable') {

details.useVersion "1.0.0"

}

if (details.requested.group == 'androidx.fragment') {

details.useVersion "1.0.0"

}

if (details.requested.group == 'androidx.appcompat') {

details.useVersion "1.0.1"

}

}

}

}