#鸿蒙通关秘籍#如何在鸿蒙应用中获取应用自身信息？

在鸿蒙应用开发中，通过使用Native Bundle接口可以获取应用自身的相关信息。

1. 打开src/main/cpp/CMakeLists.txt文件，在target_link_libraries依赖中添加libbundle_ndk.z.so： bash target_link_libraries(entry PUBLIC libace_napi.z.so libbundle_ndk.z.so)

2. 在src/main/cpp/hello.cpp中添加头文件： cpp #include "bundle/native_interface_bundle.h"

3. 初始化映射： 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;
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   } EXTERN_C_END

4. 添加获取应用信息的方法： 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;
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   }

5. 在JavaScript侧调用： 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%')
    }
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   }