HarmonyOS 鸿蒙Next worker间数据传递
HarmonyOS 鸿蒙Next worker间数据传递
关于补充问题: 1.使用可转移对象Arraybuffer,没有明确的大小限制
2.使用Worker模块时,需要在主线程中注册onerror接口,否则当worker线程出现异常时会发生jscrash问题, 参考链接:https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-worker-V5#onerror9
3.参考如下代码获取序列化数据字节数,转换后判断是否大于16M
import { util } from '@kit.ArkTS';
let textEncoder: util.TextEncoder = new util.TextEncoder();
let uint8array:Uint8Array = textEncoder.encodeInto(this.jsonString)
const byteArray = Array.from(uint8array);
console.info(“数据字节数=”+byteArray.length)
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在HarmonyOS鸿蒙系统中,实现Next Worker间的数据传递,可以通过全局变量、消息队列、或者数据绑定等方式来完成。以下是一个使用消息队列(Message Queue)实现Next Worker间数据传递的示例代码:
发送端Worker代码
#include "ohos/aafwk/ability/Ability.h"
#include "ohos/aafwk/ipc/MessageQueueLite.h"
#include "ohos/aafwk/ipc/MessageParcel.h"
using namespace OHOS::AAFwk;
class SenderWorker : public Worker {
public:
void onStart(const std::shared_ptr<IRemoteObject>& token) override {
MessageQueueLite::MessageParcel data;
data.WriteString("Hello from SenderWorker");
MessageQueueLite::Message message;
message.SetCode(1); // 消息码
message.SetData(data);
token->SendMessage(message);
}
};
接收端Worker代码
#include "ohos/aafwk/ability/Ability.h"
#include "ohos/aafwk/ipc/MessageQueueLite.h"
#include "ohos/aafwk/ipc/MessageParcel.h"
using namespace OHOS::AAFwk;
class ReceiverWorker : public Worker, public IRemoteObject::Stub {
public:
void OnRemoteRequest(uint32_t code, MessageParcel& data, MessageParcel& reply, MessageOption& option) override {
if (code == 1) {
std::string message;
data.ReadString(message);
// 处理接收到的数据
// ...
}
}
};
注册Worker
在Ability中注册这两个Worker,并启动发送端Worker以发送数据。
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