无法从android版本中的流资源访问JSON文件

import android.content.Context;
import android.content.res.AssetManager;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class JsonUtils {
    public static String loadJsonFromAsset(Context context, String fileName) {
        StringBuilder stringBuilder = new StringBuilder();
        try {
            AssetManager assetManager = context.getAssets();
            InputStream inputStream = assetManager.open(fileName);
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                stringBuilder.append(line);
            }
            bufferedReader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return stringBuilder.toString();
    }
}

String json = JsonUtils.loadJsonFromAsset(context, "example.json");