ReactWebViewManager.java 文件源码

@Override
public void onReceivedError(
    WebView webView,
    int errorCode,
    String description,
    String failingUrl) {
  super.onReceivedError(webView, errorCode, description, failingUrl);
  mLastLoadFailed = true;

  // In case of an error JS side expect to get a finish event first, and then get an error event
  // Android WebView does it in the opposite way, so we need to simulate that behavior
  emitFinishEvent(webView, failingUrl);

  WritableMap eventData = createWebViewEvent(webView, failingUrl);
  eventData.putDouble("code", errorCode);
  eventData.putString("description", description);

  dispatchEvent(
      webView,
      new TopLoadingErrorEvent(webView.getId(), eventData));
}