清除android缓存

Question

嗨,我有一个代码大小约为1/2mb的应用程序.该应用程序包含一个用于显示多个页面的webview.因此我的缓存最终为2,5mb.不够多但足够了.如何清除onDestroy上的缓存？

谢谢!

Answer 1

将此代码放在onDestroy()中以清除应用程序缓存

@Override
    protected void onDestroy() {
        super.onDestroy();

        try {
            trimCache(this);
           // Toast.makeText(this,"onDestroy " ,Toast.LENGTH_LONG).show();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
    public static void trimCache(Context context) {
        try {
           File dir = context.getCacheDir();
           if (dir != null && dir.isDirectory()) {
              deleteDir(dir);
           }
        } catch (Exception e) {
           // TODO: handle exception
        }
     }

     public static boolean deleteDir(File dir) {
        if (dir != null && dir.isDirectory()) {
           String[] children = dir.list();
           for (int i = 0; i < children.length; i++) {
              boolean success = deleteDir(new File(dir, children[i]));
              if (!success) {
                 return false;
              }
           }
        }

        // The directory is now empty so delete it
        return dir.delete();
     }