1.删除保存于手机上的缓存.
// clear the cache before time numDays private 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; }
调用:clearCacheFolder(Activity.getCacheDir(), System.currentTimeMillis());//删除此时之前的缓存.
2. 打开关闭使用缓存:
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);
3.在退出应用的时候加上如下代码:
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");