HarmonyOS鸿蒙NEXT中如何将String转成ArrayBuffer
HarmonyOS鸿蒙NEXT中如何将String转成ArrayBuffer
请问str怎么转成ArrayBuffer方法?
3 回复
您好,具体解决方案如下:
- 将string字符串转换为ArrayBuffer,可借助ArkTS当中的util.TextEncoder,代码案例参考如下:
encoderStringToBuffer(str: string): ArrayBuffer {
const encoder = util.TextEncoder.create('UTF-8')
const uint8Array = encoder.encodeInto(str)
return uint8Array.buffer
}
- 将ArrayBuffer解码为string字符串,可借助ArkTS当中的util.TextDecoder,代码案例参考如下:
bufferToString(buffer: ArrayBuffer): string {
let decoder = util.TextDecoder.create('UTF-8')
let uint8Array = new Uint8Array(buffer)
return decoder.decodeToString(uint8Array)
}
完整的测试案例代码如下:
import { util } from '@kit.ArkTS';
@Entry
@Component
struct Index {
@State message: string = 'Hello World! 你好'
encoderStringToBuffer(str: string): ArrayBuffer {
const encoder = util.TextEncoder.create('UTF-8')
const uint8Array = encoder.encodeInto(str)
return uint8Array.buffer
}
bufferToString(buffer: ArrayBuffer): string {
let decoder = util.TextDecoder.create('UTF-8')
let uint8Array = new Uint8Array(buffer)
return decoder.decodeToString(uint8Array)
}
build() {
Column({space: 20}) {
Button("encoderStringToBuffer")
.fontSize(20)
.fontWeight(FontWeight.Bold)
.onClick(() => {
let buffer = this.encoderStringToBuffer(this.message)
console.info(new Int8Array(buffer).join(","))
console.info(this.bufferToString(buffer))
})
}
.height('100%')
.width('100%')
.justifyContent(FlexAlign.Center)
}
}
更多关于HarmonyOS鸿蒙NEXT中如何将String转成ArrayBuffer的实战系列教程也可以访问 https://www.itying.com/category-93-b0.html
在HarmonyOS Next中,可以通过TextEncoder API将String转换为ArrayBuffer。具体实现代码如下:
// 创建TextEncoder实例
const encoder = new TextEncoder();
// 将字符串编码为Uint8Array
const uint8Array = encoder.encode("你的字符串");
// 转换为ArrayBuffer
const arrayBuffer = uint8Array.buffer;
或者更简洁的一行代码实现:
const arrayBuffer = new TextEncoder().encode("字符串").buffer;
这个方法利用了标准的TextEncoder API,它是Web标准的一部分,在HarmonyOS Next中同样适用。TextEncoder会将字符串转换为UTF-8编码的字节序列,存储在Uint8Array中,然后通过buffer属性获取对应的ArrayBuffer。