Android WebView （1）清除缓存

Android webview 遇到一种情况    每次loadurl加载一个新的页面，总会先显示上一个缓存的页面，等新的页面加载完成，才会显示新页面。

分析是由于缓存的问题，但是调用clearcache总是不管用。

后来找到了解决的办法，如下：

webView.loadDataWithBaseURL(null, "","text/html", "utf-8",null);  //清除缓存的有效方法 

Android.Webkit.WebView.LoadDataWithBaseURL Method

Loads the given data into this WebView, using baseUrl as the base URL for the content.

Syntax

[Android.Runtime.Register("loadDataWithBaseURL", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V", "GetLoadDataWithBaseURL_Ljava_lang_String_Ljava_lang_String_Ljava_lang_String_Ljava_lang_String_Ljava_lang_String_Handler")]
public virtual void LoadDataWithBaseURL (string baseUrl, string data, string mimeType, string encoding, string failUrl)

Parameters

baseUrl

the URL to use as the page's base URL. If null defaults to 'about:blank'.

data

a String of data in the given encoding

mimeType

the MIMEType of the data, e.g. 'text/html'. If null, defaults to 'text/html'.

encoding

the encoding of the data

historyUrl

the URL to use as the history entry. If null defaults to 'about:blank'. If non-null, this must be a valid URL.

Remarks

Loads the given data into this WebView, using baseUrl as the base URL for the content. The base URL is used both to resolve relative URLs and when applying JavaScript's same origin policy. The historyUrl is used for the history entry.

Note that content specified in this way can access local device files (via 'file' scheme URLs) only if baseUrl specifies a scheme other than 'http', 'https', 'ftp', 'ftps', 'about' or 'javascript'.

If the base URL uses the data scheme, this method is equivalent to calling WebView.LoadData(string, System.String, System.String) and the historyUrl is ignored, and the data will be treated as part of a data: URL. If the base URL uses any other scheme, then the data will be loaded into the WebView as a plain string (i.e. not part of a data URL) and any URL-encoded entities in the string will not be decoded.