public void download(View v){

        EditText et_url = (EditText) findViewById(R.id.et_url);

        String url = et_url.getText().toString().trim();

        //1.创建httpUtils对象

        HttpUtils httpUtils = new HttpUtils();

        //2.调用download方法  url:下载的地址  target：下载的目录   callback：回调 

        httpUtils.download(url, "/sdcard/feiqiu/feiq.exe", new RequestCallBack() {

            @Override

            public void onLoading(long total, long current, boolean isUploading) {

                System.out.println("total:"+total+";current:"+current);

                super.onLoading(total, current, isUploading);

            }

            @Override

            public void onSuccess(ResponseInfo responseInfo) {

                System.out.println(responseInfo.result);

            }

            @Override

            public void onFailure(HttpException error, String msg) {

                // TODO Auto-generated method stub

                

            }

        });

    }