HarmonyOS 鸿蒙Next 位图转换

参考demo：

import { image } from '[@kit](/user/kit).ImageKit'
[@Entry](/user/Entry)
[@Component](/user/Component)
struct page{
build() {
Row() {
Column() {
Button('图片转PixelMap').onClick(() => {
//通过context.resourceManager.getMediaContent获取对应resources/media下的图片数据
getContext(this).resourceManager.getMediaContent($r('app.media.startIcon')).then((data) => {
let arrayBuffer = data.buffer.slice(data.byteOffset, data.byteLength + data.byteOffset)
let imageSource: image.ImageSource = image.createImageSource(arrayBuffer);
imageSource.getImageInfo((err, value) => {
if (err) {
return;
}
let opts: image.DecodingOptions = {
editable: true,
desiredSize: {
height: value.size.height,
width: value.size.width
}
};
imageSource.createPixelMap(opts, (err, pixelMap) => {
// 这个回调的pixelMap就是当前图片的pixelMap
})
})
})
})
}
.width('100%')
}
.height('100%')
}
}