Android monitors WebView loading failure and obtains errorCode and errorMessage of WebView exception

When using WebView, we will inevitably come into contact with the exception handling requirements of WebView loading failure. At this time, the method that requires us to monitor the failure is the onReceivedError method:
 

  public class CustomWebViewClient extends WebViewClient {

        @Override
        public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
            super.onReceivedError(view, request, error);
            if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                int errorCode = error.getErrorCode();
                String errorMessage = error.getDescription().toString();
                Log.i("CustomWebViewClient", "onReceivedError  errorCode : " + errorCode + " errorMessage : " + errorMessage);
            }
        }

        @Override
        public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
            super.onReceivedError(view, errorCode, description, failingUrl);
            if (android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
                Log.i("CustomWebViewClient", "onReceivedError  errorCode : " + errorCode + " description : " + description);
            }
        }
    }

Note: The onReceivedError() method of WebViewClient should be compatible with the Android version, android 6.0 and above call back the above method, if it is below 6.0, call back the following function.

 The following is an enumeration of errorCode:

  /** Generic error */
    public static final int ERROR_UNKNOWN = -1;
    /** Server or proxy hostname lookup failed */
    public static final int ERROR_HOST_LOOKUP = -2;
    /** Unsupported authentication scheme (not basic or digest) */
    public static final int ERROR_UNSUPPORTED_AUTH_SCHEME = -3;
    /** User authentication failed on server */
    public static final int ERROR_AUTHENTICATION = -4;
    /** User authentication failed on proxy */
    public static final int ERROR_PROXY_AUTHENTICATION = -5;
    /** Failed to connect to the server */
    public static final int ERROR_CONNECT = -6;
    /** Failed to read or write to the server */
    public static final int ERROR_IO = -7;
    /** Connection timed out */
    public static final int ERROR_TIMEOUT = -8;
    /** Too many redirects */
    public static final int ERROR_REDIRECT_LOOP = -9;
    /** Unsupported URI scheme */
    public static final int ERROR_UNSUPPORTED_SCHEME = -10;
    /** Failed to perform SSL handshake */
    public static final int ERROR_FAILED_SSL_HANDSHAKE = -11;
    /** Malformed URL */
    public static final int ERROR_BAD_URL = -12;
    /** Generic file error */
    public static final int ERROR_FILE = -13;
    /** File not found */
    public static final int ERROR_FILE_NOT_FOUND = -14;
    /** Too many requests during this load */
    public static final int ERROR_TOO_MANY_REQUESTS = -15;