#鸿蒙通关秘籍#鸿蒙系统中如何转换Native应用信息为JavaScript对象？

在鸿蒙系统中，要将应用信息从Native格式转换为JavaScript对象格式，需要以下步骤：

1. 创建工程并初始化：

   • 在工程目录下生成cpp目录，包含libentry/index.d.ts, hello.cpp, CMakeLists.txt等文件

2. 编辑构建文件：

   • src/main/cpp/CMakeLists.txt中，添加libbundle_ndk.z.so到target_link_libraries依赖： bash target_link_libraries(entry PUBLIC libace_napi.z.so libbundle_ndk.z.so)

3. 在Native侧，增加头文件： cpp #include "bundle/native_interface_bundle.h"

4. 定义映射与转换方法：

   • 映射初始化： cpp EXTERN_C_START static napi_value Init(napi_env env, napi_value exports) { napi_property_descriptor desc[] = { { "getCurrentApplicationInfo", nullptr, GetCurrentApplicationInfo, nullptr, nullptr, nullptr, napi_default, nullptr } };

     napi_define_properties(env, exports, sizeof(desc) / sizeof(desc[0]), desc); return exports; } EXTERN_C_END

   • 定义数据转换方法： cpp static napi_value GetCurrentApplicationInfo(napi_env env, napi_callback_info info) { OH_NativeBundle_ApplicationInfo nativeApplicationInfo = OH_NativeBundle_GetCurrentApplicationInfo(); napi_value result = nullptr; napi_create_object(env, &result);

     napi_value bundleName; napi_create_string_utf8(env, nativeApplicationInfo.bundleName, NAPI_AUTO_LENGTH, &bundleName); napi_set_named_property(env, result, "bundleName", bundleName);

     napi_value fingerprint; napi_create_string_utf8(env, nativeApplicationInfo.fingerprint, NAPI_AUTO_LENGTH, &fingerprint); napi_set_named_property(env, result, "fingerprint", fingerprint);

     char* appId = OH_NativeBundle_GetAppId(); napi_value napi_appId; napi_create_string_utf8(env, appId, NAPI_AUTO_LENGTH, &napi_appId); napi_set_named_property(env, result, "appId", napi_appId);

     char* appIdentifier = OH_NativeBundle_GetAppIdentifier(); napi_value napi_appIdentifier; napi_create_string_utf8(env, appIdentifier, NAPI_AUTO_LENGTH, &napi_appIdentifier); napi_set_named_property(env, result, "appIdentifier", napi_appIdentifier);

     free(nativeApplicationInfo.bundleName); free(nativeApplicationInfo.fingerprint); free(appId); free(appIdentifier);

     return result; }

5. 在JavaScript中使用转换后的对象： javascript import testNapi from 'libentry.so';

   @Entry @Component struct Index { @State message: string = 'Hello World';

    build() {
        Row() {
            Column() {
                Text(this.message)
                    .fontSize(50)
                    .fontWeight(FontWeight.Bold)
   
                Button() {
                    Text("GetCurrentApplicationInfo").fontSize(30)
                }
                .type(ButtonType.Capsule)
                .margin({ top: 20 })
                .backgroundColor('#0D9FFB')
                .width('70%')
                .height('5%')
                .onClick(() => {
                    try {
                        let data = testNapi.getCurrentApplicationInfo();
                        console.info("getCurrentApplicationInfo success, data is " + JSON.stringify(data));
                    } catch (error) {
                        console.error("getCurrentApplicationInfo failed");
                        this.message = "getCurrentApplicationInfo failed";
                    }
                })
            }
            .width('100%')
        }
        .height('100%')
    }
   

   }