Harmony鸿蒙webview打开本地网页，dataability方法
一，在config.json文件中增加配置

"abilities": [
      {
        "name": "包名.MainAbility",
        "icon": "$media:icon",
        "description": "$string:mainability_description",
        "label": "$string:entry_MainAbility",
        "type": "page",
        "launchType": "standard"
      },
      {
        "name": "包名.DataAbility",
        "type": "data",
        "uri": "dataability://包名.DataAbility"
      }
    ]

二，新建DataAbility

public class DataAbility extends Ability {
    @Override
    public RawFileDescriptor openRawFile(Uri uri, String mode) throws FileNotFoundException {
        if (uri == null) {;
            return super.openRawFile(uri, mode);
        }
        String path = uri.getEncodedPath();
        int splitIndex = path.indexOf('/', 1);
        String providerName = Uri.decode(path.substring(1, splitIndex));
        String rawFilePath = Uri.decode(path.substring(splitIndex + 1));
        RawFileDescriptor rawFileDescriptor = null;
        try {
            rawFileDescriptor = getResourceManager().getRawFileEntry(rawFilePath).openRawFileDescriptor();
        } catch (IOException e) {
            // 异常处理
        }
        return rawFileDescriptor;
    }
}

三、调用

private static final String URL_LOCAL = "dataability://包名.DataAbility/resources/rawfile/根目录/index.html";
//把你的网页放到根目录下，根目录这三个字可以改为你自己的名称
webView.getWebConfig().setDataAbilityPermit(true);//这个要加上，设置webview支持打开本地文件
webView.load(URL_LOCAL);