HarmonyOS 清除应用缓存有相关Api或者文档吗？

1.清理缓存目前没有api实现。可以通过获取应用沙箱目录下的缓存文件夹路径(/data/storage/el1/base/cache /data/storage/el1/base/haps/entry/cache /data/storage/el2/base/cache /data/storage/el2/base/haps/entry/cache)并删除来实现缓存清理。

2.从应用中跳转至的系统手机权限，可以参考如下demo来实现：

import common from '@ohos.app.ability.common';
@Entry
@Component
struct Index {
  build() {
    Row() {
      Column() {
        Button("跳转到设置").onClick(() => {
          let context = getContext(this) as common.UIAbilityContext;
          context.startAbility({
            bundleName: 'com.huawei.hmos.settings',
            abilityName: 'com.huawei.hmos.settings.MainAbility',
          });
        })

        Button("to蓝牙").onClick(() => {
          let context = getContext(this) as common.UIAbilityContext;
          context.startAbility({
            bundleName: 'com.huawei.hmos.settings',
            abilityName: 'com.huawei.hmos.settings.MainAbility', // com.huawei.hmos.settings.AppInfoAbility
            uri: "bluetooth_entry", //application_settings application_info_entry
          });
        })

        Button("toWLAN页面").onClick(() => {
          let context = getContext(this) as common.UIAbilityContext;
          context.startAbility({
            bundleName: 'com.huawei.hmos.settings',
            abilityName: 'com.huawei.hmos.settings.MainAbility', // com.huawei.hmos.settings.AppInfoAbility
            uri: "wifi_entry", //application_settings application_info_entry
          });
        })

        Button("to应用信息")
          .onClick(()=> {
            let context = getContext(this) as common.UIAbilityContext;
            context.startAbility({ bundleName: 'com.huawei.hmos.settings',
              abilityName: 'com.huawei.hmos.settings.MainAbility',// com.huawei.hmos.settings.AppInfoAbility
              uri: 'application_info_entry', //application_settings application_info_entry
              parameters: { pushParams: 'com.example.test' // 应用包名com.example.tosettingdemo
              } }); })
      }
      .width('100%')
    }
    .height('100%')
  }
}