ArrayBuffer内部包含一块Native内存,该ArrayBuffer的JS对象壳被分配在虚拟机本地堆(LocalHeap)。与普通对象一样,需要经过序列化与反序列化拷贝传递,但是Native内存有两种传输方式:拷贝和转移。 Uint8Array Uint8Array是一种基本的JavaScript数组类型,用于处理二进制数据。它是无符号的8位整数数组,每个元素固定为1字节(8...
let arrayBuffer = new ArrayBuffer(5) buffer.from(arrayBuffer).fill(1) console.log("testBuffer ="...
这个在ArkTS中是不允许的。要把Uint8Array转成ArrayBuffer，只要let buffer = uint8Array.buffer就行。
uint8Array2String(input: Uint8Array) { let textDecoder = util.TextDecoder.create("utf-8", { ignoreBOM: true }) return textDecoder.decodeWithStream(input, { stream: false }); } /** * ArrayBuffer 转 String * @param input * @returns */ arrayBuffer2String(input: ArrayBuffer) { return thi...
nodeper2楼•4 个月前
("Succeeded in getting RawFileContent") // 获取图片的ArrayBuffer const buffer = fileData.buffer.slice(0); const imageSource : image.ImageSource = image.createImageSource(buffer); }).catch((err : BusinessError) => { console.error("Failed to get RawFileContent") }); // 创建PixelMap ...
)return"["+ time +"]"}//ArrayBuffer转utf8字符串function buf2String(buf: ArrayBuffer) { let msgArray = new Uint8Array(buf); let textDecoder = util.TextDecoder.create("utf-8");returntextDecoder.decodeWithStream(msgArray) } 步骤4:编译运行,可以使用模拟器或者真机。
type ValueType = number | string | image.PixelMap | Want | ArrayBuffer 变更之后,ValueType类型如下: type ValueType = number | string | boolean | image.PixelMap | Want | ArrayBuffer | object | null | undefined ArkTS Sendable容器TypedArray提供的map方法的回调函数声明变更 ...
筛选支持能力集包含的API并提供API联想" let dealStr = StringUtils.string2Uint8Array1(globalPlainText) let base64Str = base64.encode(dealStr) LogUtils.i("base64 = " + base64Str); // let arr1: ArrayBuffer = base64.decode(base64Str) LogUtils.i("result1 = " + StringUtils.arrayBuffer2...
* ArrayBuffer 转 String *@paraminput*@returns*/arrayBuffer2String(input:ArrayBuffer){returnthis.uint8Array2String(newUint8Array(input)) } }exportdefaultnewStringUtils() 示例代码: letglobalPlainText =""globalPlainText +="一二三四五六七八九十"globalPlainText +="SDK向DevEco Studio提供全量API,DevEco ...