鸿蒙平台 UI审核如何实现？

多端适配问题可以查看https://device.harmonyos.com/cn/docs/documentation/DevicePartner-Guides/uxdesign-multi-phone-0000001152454076

媒体查询以Image 为例

DataAbilityHelper helper = DataAbilityHelper.creator(SaveFileAbilitySlice.this);
try {
    ResultSet resultSet = helper.query(AVStorage.Images.Media.EXTERNAL_DATA_ABILITY_URI,
            new String[]{AVStorage.Images.Media.DISPLAY_NAME,AVStorage.Images.Media.SIZE,AVStorage.Images.Media.DATE_MODIFIED,AVStorage.Images.Media.VOLUME_NAME}, null);
    int count = resultSet.getRowCount();
    LogUtil.error("Images count: " + count);
    if (count == 0) {
        requestPermission(SystemPermission.READ_USER_STORAGE, 1001);
        return;
    }
    while (resultSet.goToNextRow()) {
        String name = resultSet.getString(0);
        long size = resultSet.getLong(1);
        String date = resultSet.getString(2);
        String VOLUME_NAME = resultSet.getString(3);
    }
} catch (DataAbilityRemoteException e) {
    e.printStackTrace();
}
private void requestPermission(String permission, int requestCode) {
    if (verifySelfPermission(permission) == IBundleManager.PERMISSION_GRANTED) {
        LogUtil.error("Permission already obtained");
        return;
    }
    if (!canRequestPermission(permission)) {
        LogUtil.error("Cannot request Permission");
        return;
    }
    requestPermissionsFromUser(new String[]{permission}, requestCode);
}

config.json文件中需要配置读写权限 
{
  "name": "ohos.permission.READ_MEDIA"
},
{
  "name": "ohos.permission.WRITE_MEDIA"
},