# JsToJavaDemo

**Repository Path**: sugarnine/js-to-java-demo

## Basic Information

- **Project Name**: JsToJavaDemo
- **Description**: 一个鸿蒙活动的源码
简单的 js 调用 javaUI 的应用示例
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 1
- **Forks**: 0
- **Created**: 2021-04-16
- **Last Updated**: 2021-09-23

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

#### Harmony手机开发 JsUI 调用 JavaUI

预览：

![pre_demo](./preview.gif)


主要代码：

    // js中的事件函数 与 调用 javaPA

    openCameraAbility(){
        let content = {
            code: 1001,
            data: {
                table: "mnote",
                values: {
                    filterkey: "all",
                    filtervalue: "",
                },
            },
        };
        this.connectJava(content);
    },
    async connectJava(content) {
        let messageCode = content.code;
        let ability_action = {
            bundleName: "com.dweb.jiugongzi",
            abilityName: "com.dweb.jiugongzi.service.JsToJava",
            messageCode: messageCode,
            abilityType: 0,
            data: content.data,
            syncOption: 0,
        };
        let ret = await FeatureAbility.callAbility(ability_action);
        console.info(ret);
        ret = JSON.parse(ret);

        switch (ret.code) {
            case 1001:
                console.info(ret.code);
                console.info(ret.msg);
                console.info(ret.data);
                break;

            default:
                console.error(ret.code);
                break;
        }
    },


    javaPA serviceAbility 中执行路由跳转
    switch (code){
          case 1001:{
              //开始处理数据
              Intent secondIntent = new Intent();
              Operation operation = new Intent.OperationBuilder()
                      .withDeviceId("")
                      .withBundleName("com.dweb.jiugongzi")
                      .withAbilityName("com.dweb.jiugongzi.Image")
                      .build();
              secondIntent.setOperation(operation);
              // 通过AbilitySlice的startAbility接口实现启动另一个页面
              startAbility(secondIntent);
              //通信成功信息发送前端
              Map<String, Object> zsonResult = new HashMap<String, Object>();
              zsonResult.put("code", 0);
              zsonResult.put("msg", "跳转通信成功 -- 1001");
              System.out.println("=====跳转通信成功 -- 1001");
              reply.writeString(ZSONObject.toZSONString(zsonResult));
              break;
          }
          default:{
              reply.writeString("java返回通信失败 -- no code");
              return  false;
          }
      }



官方文档参考：
https://developer.harmonyos.com/cn/docs/documentation/doc-references/js-apis-fa-calls-pa-mechanism-0000001050022401

Demo地址：
https://gitee.com/sugarnine/js-to-java-demo

图片裁剪的javaUI代码：
https://harmonyos.51cto.com/posts/3443#bkwz