當網址需要新增請求頭的時候

Map<String, String> header = new HashMap<>();
header.put("user", result);
webView.loadUrl(URL, header);

底下是原始碼,很清晰明瞭.

/**
 * Loads the given URL with the specified additional HTTP headers.
 * <p>
* Also see compatibility note on {@link #evaluateJavascript}.
 
 *
 * @param url the URL of the resource to load
 * @param additionalHttpHeaders the additional headers to be used in the
 *            HTTP request for this URL, specified as a map from name to
 *            value. Note that if this map contains any of the headers
 *            that are set by default by this WebView, such as those
 
 *            controlling caching, accept types or the User-Agent, their
 *            values may be overriden by this WebView's defaults.
 */
public void loadUrl(String url, Map<String, String> additionalHttpHeaders) {
    checkThread();
mProvider.loadUrl(url, additionalHttpHeaders);
}