@OnClick(R.id.download)
    public void onViewClicked() {
        String path = mEt.getText().toString().trim();
        HttpUtils httpUtils = new HttpUtils();
        httpUtils.download(path, getFileName(path), true, new RequestCallBack<File>() {
            @Override
            public void onSuccess(ResponseInfo<File> responseInfo) {
                Toast.makeText(MainActivity.this, "下载成功", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onLoading(long total, long current, boolean isUploading) {
                mPb.setMax((int) total);
                mPb.setProgress((int) current);
            }

            @Override
            public void onFailure(HttpException error, String msg) {

            }
        });
    }