iimsimsiHarmonyOS 获取和清理缓存的API方法

import { storageStatistics } from '@kit.CoreFileKit'; 
import fs from '@ohos.file.fs'; 
import { Context } from '@kit.AbilityKit'; 
import { BusinessError } from '@ohos.base'; 
 
//获取缓存 
getCacheSize() { 
  storageStatistics.getCurrentBundleStats((error: BusinessError, bundleStats: storageStatistics.BundleStats) => { 
    if (error) { 
      console.error("getCurrentBundleStats failed with error:" + JSON.stringify(error)); 
    } else { 
      let cacheSize = parseFloat((bundleStats.cacheSize / (1024*1024)).toFixed(1)) 
      console.info('cacheSize:' + cacheSize); 
    } 
  }) 
} 
 
//清理缓存 
clearCache() { 
  const context: Context = getContext(this); 
  let cacheDir = context.cacheDir 
  fs.listFile(cacheDir).then((filenames) => { 
    for (let i = 0;i < filenames.length; i++) { 
      let dirPath = cacheDir+filenames[i] 
      try { 
        // 判断是否文件夹 
        let isDirectory = fs.statSync(dirPath).isDirectory() 
        if (isDirectory) { 
          fs.rmdirSync(dirPath) 
        } else { 
          fs.unlink(dirPath).then(() => { 
            console.info('remove file succeed'); 
          }).catch((err: BusinessError) => { 
            console.info("remove file failed with error message: " + err.message + ", error code: " + err.code); 
          }); 
        } 
      }catch (e) { 
        console.log(e) 
      } 
    } 
  }) 
}
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