HarmonyOS 鸿蒙Next MMKV初始化失败

前提您[@tencent](/user/tencent)/mmkv安装是成功的。

1. 在EntryAbility的onCreate生命周期进行初始化。

```javascript
onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
  hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');
  let appCtx = this.context.getApplicationContext();
  let mmkvRootDir = MMKV.initialize(appCtx);
  console.info('mmkv rootDir: ', mmkvRootDir);
}

1. 在Entry页面进行初始化 参考demo：

import { MMKV } from '[@tencent](/user/tencent)/mmkv';
import { common } from '[@kit](/user/kit).AbilityKit';

[@Entry](/user/Entry)
[@Component](/user/Component)
struct Index {
  [@State](/user/State) message: string = '';

  build() {
    Column() {
      Text(this.message)
        .fontSize(50)
        .fontWeight(FontWeight.Bold)

      Button('初始化')
        .onClick(()=>{
          let context = getContext(this) as common.UIAbilityContext;
          let appCtx = context.getApplicationContext();
          let mmkvRootDir = MMKV.initialize(appCtx);
        })
    }
    .height('100%')
    .width('100%')
  }
}