/**

     * 웹뷰에 케시가 쌓이는것을 앱이 종료할때마다 비우는 함수

     */

    private void clearApplicationCache(java.io.File dir){

        if(dir==null)

            dir = getCacheDir();

        else;

        if(dir==null)

            return;

        else;

        java.io.File[] children = dir.listFiles();

        try{

            for(int i=0;i<children.length;i++)

                if(children[i].isDirectory())

                    clearApplicationCache(children[i]);

                else children[i].delete();

        }

        catch(Exception e){}

    }


    @Override

    public void onDestroy() {

        super.onDestroy();

        clearApplicationCache(null);

    }