封装Logger工具HarmonyOS NEXT（适用API12以上版本）

HarmonyOS NEXT

.封装Logger工具

1.第一步

/**
 * 1. 封装一个Logger工具类
 * 2. 工具类提供一系列的方法(info, debug, error, warn)
 * 3. 导出一个实例对象, 使用处通过实例对象调用方法
 */
import { hilog } from "@kit.PerformanceAnalysisKit";

const PREFIX = 'interview_tong_logger'

class Logger {
  private domain: number;
  private prefix: string;
  private format: string = '%{public}s, %{public}s';
  constructor(domain: number, prefix: string) {
    this.domain = domain
    this.prefix = prefix
  }

  debug(...args: string[]): void {
    hilog.debug(this.domain, this.prefix, this.format, args);
  }

  info(...args: string[]): void {
    hilog.info(this.domain, this.prefix, this.format, args);
  }

  warn(...args: string[]): void {
    hilog.warn(this.domain, this.prefix, this.format, args);
  }

  error(...args: string[]): void {
    hilog.error(this.domain, this.prefix, this.format, args);
  }
}

export const logger = new Logger(0x1234, PREFIX)
\ No newline at end of file

2.第二步

3.第三步

import { AbilityConstant, ConfigurationConstant, UIAbility, Want } from '@kit.AbilityKit';
import { hilog } from '@kit.PerformanceAnalysisKit';
import { window } from '@kit.ArkUI';
import { logger } from '../commons/utils';

const DOMAIN = 0x0000;

export default class EntryAbility extends UIAbility {
  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
    this.context.getApplicationContext().setColorMode(ConfigurationConstant.ColorMode.COLOR_MODE_NOT_SET);
    logger.info('Ability onCreate')
  }

  onDestroy(): void {
    logger.info('Ability onDestroy')
  }

  onWindowStageCreate(windowStage: window.WindowStage): void {
    // Main window is created, set main page for this ability
    logger.info('Ability onWindowStageCreate')

    windowStage.loadContent('pages/Index', (err) => {
      if (err.code) {
        logger.error(JSON.stringify(err))
        return;
      }
      logger.info('Succeeded in loading the content.')
    });
  }

  onWindowStageDestroy(): void {
    // Main window is destroyed, release UI related resources
    logger.info('Ability onWindowStageDestroy')
  }

  onForeground(): void {
    // Ability has brought to foreground
    logger.info('Ability onForeground')
  }

  onBackground(): void {
    // Ability has back to background
    logger.info('Ability onBackground')
  }
}

4.第四步测试

import { fullScreen } from '../commons/utils/FullScreen';

@Entry
@Component
struct Index {
  @StorageProp('topHeight') topHeight: number = 0
  @StorageProp('bottomHeight') bottomHeight: number = 0

  aboutToAppear(): void {
    setTimeout(() => {
      fullScreen.disable()
    }, 3000)
  }

  build() {
    Column() {
      Button('TOP')
      Blank()
      Button('Bottom')
    }
    .backgroundColor(Color.Pink)
    .height('100%')
    .width('100%')
    .padding({ top: this.topHeight, bottom: this.bottomHeight })
  }
}