Android实现WebView删除缓存的方法

// clear the cache before time numDaysprivate int clearCacheFolder(File dir, long numDays) {  int deletedFiles = 0;  if (dir!= null && dir.isDirectory()) {    try {      for (File child:dir.listFiles()) {        if (child.isDirectory()) {          deletedFiles += clearCacheFolder(child, numDays);        }        if (child.lastModified() < numDays) {          if (child.delete()) {            deletedFiles++;          }        }      }    } catch(Exception e) {      e.printStackTrace();    }  }  return deletedFiles;}

//优先使用缓存：WebView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);//不使用缓存：WebView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);

File file = CacheManager.getCacheFileBaseDir();  if (file != null && file.exists() && file.isDirectory()) {  for (File item : file.listFiles()) {   item.delete();  }  file.delete();  } context.deleteDatabase("webview.db"); context.deleteDatabase("webviewCache.db");