ProgressDialog mProgressDialog;//声明
mProgressDialog = new ProgressDialog(this);//实例化
mProgressDialog.setMessage("正在获取数据中,请稍候……");//窗口内容
mProgressDialog.show();//显示dialog
mProgressDialog.cancel();//dialog消失
触摸屏幕对话框不消失的解决方法
mProgressDialog.setCanceledOnTouchOutside(false);