Question

在Android设备（包括4.4.2）上，默认浏览器和Chrome支持HTML5缓存清单。但是，在这些相同的设备上，WebView组件似乎不支持HTML5缓存清单。有谁知道如何让WebView组件支持HTML5清单？

Answer 1

webView.getSettings().setDomStorageEnabled(true);

// Set cache size to 8 mb by default. should be more than enough
webView.getSettings().setAppCacheMaxSize(1024*1024*8);

// This next one is crazy. It's the DEFAULT location for your app's cache
// But it didn't work for me without this line
webView.getSettings().setAppCachePath("/data/data/"+ getPackageName() +"/cache");
webView.getSettings().setAllowFileAccess(true);
webView.getSettings().setAppCacheEnabled(true);

webView.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);

Answer 2

试试这段代码：

private void enableHTML5AppCache() {

          webView.getSettings().setDomStorageEnabled(true);

          // Set cache size to 8 mb by default. should be more than enough
          webView.getSettings().setAppCacheMaxSize(1024*1024*8);

          // This next one is crazy. It's the DEFAULT location for your app's cache
          // But it didn't work for me without this line
          webView.getSettings().setAppCachePath("/data/data/"+ getPackageName() +"/cache");
          webView.getSettings().setAllowFileAccess(true);
          webView.getSettings().setAppCacheEnabled(true);

          webView.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);
    }

Here链接。

Answer 3

@Override
 public void onReceivedError(WebView view, int errorCode,
      String description, String failingUrl)
  {
    // The magic redirect
    if( "http://HTML5app.com/app/".equals(failingUrl) ) {
      // main.html is the place we are redirected to by the server if we are online
      mWebView.loadUrl("http://HTML5app.com/app/main.html");

     return;
   }
   else if( "http://HTML5app.com/app/main.html".equals(failingUrl) ) {
     // The cache failed - We don't have an offline version to show
     // This code removes the ugly android's "can't open page"
     // and simply shows a dialog stating we have no network
     view.loadData("", "text/html", "UTF-8");
     showDialog(DIALOG_NONETWORK);
   }
 }

上述方法将用于处理离线场景中的重定向。 [为了实现appcache和路径，请参考之前的评论。

参考链接：HTML5 Cache mechanism in android

如何使webview使用HTML5缓存清单？

3 个答案: