原因在于lottie 源碼中的這一段。如果 contentType 不滿足判斷為zip 的條件。會(huì)導(dǎo)致他被當(dāng)做json處理。解析失敗

@NonNull
  private LottieResult<LottieComposition> fromInputStream(Context context, @NonNull String url, @NonNull InputStream inputStream, @Nullable String contentType,
      @Nullable String cacheKey) throws IOException {
    FileExtension extension;
    LottieResult<LottieComposition> result;
    if (contentType == null) {
      // Assume JSON for best effort parsing. If it fails, it will just deliver the parse exception
      // in the result which is more useful than failing here.
      contentType = "application/json";
    }
    if (contentType.contains("application/zip") ||
        contentType.contains("application/x-zip") ||
        contentType.contains("application/x-zip-compressed") ||
        url.split("\\?")[0].endsWith(".lottie")) {
      Logger.debug("Handling zip response.");
      extension = FileExtension.ZIP;
      result = fromZipStream(context, url, inputStream, cacheKey);
    } else {
      Logger.debug("Received json response.");
      extension = FileExtension.JSON;
      result = fromJsonStream(url, inputStream, cacheKey);
    }

    if (cacheKey != null && result.getValue() != null && networkCache != null) {
      networkCache.renameTempFile(url, extension);
    }

    return result;
  }