鸿蒙 APP 性能优化与 Next 原生合规实践

2.2 渲染优化实现

1. 渲染优化工具类

entry/src/main/ets/utils/RenderingOptimizationUtil.ets

import rendering from '@ohos.rendering';

export class RenderingOptimizationUtil {
    private static instance: RenderingOptimizationUtil | null = null;
    private renderingHelper: rendering.RenderingHelper | null = null;

    static getInstance(): RenderingOptimizationUtil {
        if (!RenderingOptimizationUtil.instance) {
            RenderingOptimizationUtil.instance = new RenderingOptimizationUtil();
        }
        return RenderingOptimizationUtil.instance;
    }

    async init(): Promise<void> {
        if (!this.renderingHelper) {
            this.renderingHelper = rendering.createRenderingHelper();
        }
    }

    async optimizeRenderingEfficiency(): Promise<void> {
        if (!this.renderingHelper) return;
        await this.renderingHelper.optimizeRenderingEfficiency();
    }

    async getRenderingFrameRate(): Promise<number> {
        if (!this.renderingHelper) return 0;
        const result = await this.renderingHelper.getRenderingFrameRate();
        return result;
    }
}

2. 渲染优化应用

entry/src/main/ets/pages/HomePage.ets

import { RenderingOptimizationUtil } from '../utils/RenderingOptimizationUtil';

@Entry
@Component
struct HomePage {
    @State recommendedProducts: Array<ProductModel> = [];
    @State renderingFrameRate: number = 0;

    build() {
        Column({ space: 16 }) {
            Text(`渲染帧率：${this.renderingFrameRate}fps`).fontSize(14).textColor('#666666');
            Text('推荐商品').fontSize(18).fontWeight(FontWeight.Bold).textColor('#000000');
            ListComponent({ data: this.recommendedProducts, renderItem: (item: ProductModel, index: number) => {
                Row({ space: 16 }) {
                    Image(item.imageUrl).width(60).height(60).objectFit(ImageFit.Contain);
                    Column({ space: 8 }) {
                        Text(item.name).fontSize(14).fontWeight(FontWeight.Bold).textColor('#000000');
                        Text(`¥${item.price}`).fontSize(16).fontWeight(FontWeight.Bold).textColor('#FF0000');
                    }.layoutWeight(1);
                    Text(item.category).fontSize(14).textColor('#666666');
                }.width('100%').height('auto').padding(16).backgroundColor('#FFFFFF').borderRadius(12);
            }, onItemClick: (item: ProductModel, index: number) => {
                router.pushUrl({ url: '/pages/ProductDetailPage', params: { id: item.id } });
            }});
        }.width('100%').height('100%').padding(16).backgroundColor('#F5F5F5');
    }

    aboutToAppear() {
        RenderingOptimizationUtil.getInstance().init();
        this.optimizeRenderingEfficiency();
        this.getRecommendedProducts();
    }

    async optimizeRenderingEfficiency(): Promise<void> {
        await RenderingOptimizationUtil.getInstance().optimizeRenderingEfficiency();
        this.renderingFrameRate = await RenderingOptimizationUtil.getInstance().getRenderingFrameRate();
    }
}

2.3 网络优化实现

1. 网络优化工具类

entry/src/main/ets/utils/NetworkOptimizationUtil.ets

import network from '@ohos.network';

export class NetworkOptimizationUtil {
    private static instance: NetworkOptimizationUtil | null = null;
    private networkHelper: network.NetworkHelper | null = null;

    static getInstance(): NetworkOptimizationUtil {
        if (!NetworkOptimizationUtil.instance) {
            NetworkOptimizationUtil.instance = new NetworkOptimizationUtil();
        }
        return NetworkOptimizationUtil.instance;
    }

    async init(): Promise<void> {
        if (!this.networkHelper) {
            this.networkHelper = network.createNetworkHelper();
        }
    }

    async optimizeNetworkRequestSpeed(): Promise<void> {
        if (!this.networkHelper) return;
        await this.networkHelper.optimizeNetworkRequestSpeed();
    }

    async getNetworkRequestSpeed(): Promise<number> {
        if (!this.networkHelper) return 0;
        const result = await this.networkHelper.getNetworkRequestSpeed();
        return result;
    }
}

2. 网络优化应用

entry/src/main/ets/services/ProductService.ets

import { NetworkOptimizationUtil } from '../utils/NetworkOptimizationUtil';

export class ProductService {
    async getProducts(): Promise<Array<ProductModel>> {
        await NetworkOptimizationUtil.getInstance().optimizeNetworkRequestSpeed();
        const requestSpeed = await NetworkOptimizationUtil.getInstance().getNetworkRequestSpeed();
        hilog.info(0x0000, 'ProductService', '网络请求速度：%{public}dms', requestSpeed);
        await new Promise(resolve => setTimeout(resolve, 1000));
        return products;
    }
}

三、Next 原生合规实战

3.1 代码规范实现

entry/src/main/ets/utils/CodeStandardUtil.ets

import standard from '@ohos.standard';

export class CodeStandardUtil {
    private static instance: CodeStandardUtil | null = null;
    private standardHelper: standard.StandardHelper | null = null;

    static getInstance(): CodeStandardUtil {
        if (!CodeStandardUtil.instance) {
            CodeStandardUtil.instance = new CodeStandardUtil();
        }
        return CodeStandardUtil.instance;
    }

    async init(): Promise<void> {
        if (!this.standardHelper) {
            this.standardHelper = standard.createStandardHelper();
        }
    }

    async checkCodeStandard(): Promise<void> {
        if (!this.standardHelper) return;
        await this.standardHelper.checkCodeStandard();
    }

    async fixCodeStandardIssues(): Promise<void> {
        if (!this.standardHelper) return;
        await this.standardHelper.fixCodeStandardIssues();
    }
}

3.2 权限合规实现

entry/src/main/ets/utils/PermissionComplianceUtil.ets

import compliance from '@ohos.compliance';

export class PermissionComplianceUtil {
    private static instance: PermissionComplianceUtil | null = null;
    private complianceHelper: compliance.ComplianceHelper | null = null;

    static getInstance(): PermissionComplianceUtil {
        if (!PermissionComplianceUtil.instance) {
            PermissionComplianceUtil.instance = new PermissionComplianceUtil();
        }
        return PermissionComplianceUtil.instance;
    }

    async init(): Promise<void> {
        if (!this.complianceHelper) {
            this.complianceHelper = compliance.createComplianceHelper();
        }
    }

    async checkPermissionCompliance(): Promise<void> {
        if (!this.complianceHelper) return;
        await this.complianceHelper.checkPermissionCompliance();
    }

    async fixPermissionComplianceIssues(): Promise<void> {
        if (!this.complianceHelper) return;
        await this.complianceHelper.fixPermissionComplianceIssues();
    }
}

3.3 数据合规实现

entry/src/main/ets/utils/DataComplianceUtil.ets

import compliance from '@ohos.compliance';

export class DataComplianceUtil {
    private static instance: DataComplianceUtil | null = null;
    private complianceHelper: compliance.ComplianceHelper | null = null;

    static getInstance(): DataComplianceUtil {
        if (!DataComplianceUtil.instance) {
            DataComplianceUtil.instance = new DataComplianceUtil();
        }
        return DataComplianceUtil.instance;
    }

    async init(): Promise<void> {
        if (!this.complianceHelper) {
            this.complianceHelper = compliance.createComplianceHelper();
        }
    }

    async checkDataCompliance(): Promise<void> {
        if (!this.complianceHelper) return;
        await this.complianceHelper.checkDataCompliance();
    }

    async fixDataComplianceIssues(): Promise<void> {
        if (!this.complianceHelper) return;
        await this.complianceHelper.fixDataComplianceIssues();
    }
}

四、项目配置与部署

4.1 配置文件修改

在 entry/src/main/module.json5 中添加相关配置：

{
    "module": {
        "requestPermissions": [...],
        "abilities": [...],
        "widgets": [...],
        "pages": [...]
    }
}

4.2 项目部署

1. 编译项目：在 DevEco Studio 中点击 Build → Build HAP。
2. 部署到设备：将编译后的 HAP 文件部署至鸿蒙设备。
3. 测试验证：检查启动、渲染、网络及合规功能效果。

五、总结

本文完成了鸿蒙 APP 性能优化与 Next 原生合规的实现方案，涵盖启动、渲染、网络优化及代码、权限、数据合规机制。通过工具类封装与模块化设计，提升了应用性能与合规性，为后续上线奠定基础。