如何在ProgressDialog中更改进度微调器？

ProgressDialog progressDialog = new ProgressDialog(context);
progressDialog.setTitle("正在下载");
progressDialog.setMessage("请稍候...");
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressDialog.setProgress(0);
progressDialog.setMax(100);
progressDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "取消", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        // 取消按钮的点击事件处理
    }
});
progressDialog.setCancelable(false);
progressDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
    @Override
    public void onCancel(DialogInterface dialog) {
        // 对话框取消时的处理
    }
});
progressDialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
    @Override
    public void onDismiss(DialogInterface dialog) {
        // 对话框消失时的处理
    }
});
progressDialog.setOnKeyListener(new DialogInterface.OnKeyListener() {
    @Override
    public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
        // 对话框按键事件的处理
        return false;
    }
});
progressDialog.show();