http://www.cnblogs.com/Gaojiecai/archive/2011/12/10/2283156.html

Android 4.0设置Dialog点击屏幕不消失

				new AlertDialog
				   .Builder(UploadPicture.this)
				   .setCancelable(false)//点击屏幕不消失
				   .setPositiveButton("关闭",new DialogInterface.OnClickListener() {
							@Override
							public void onClick(DialogInterface dialog, int which) {
								// TODO Auto-generated method stub
								getIntentInfo();
							}
						})
					.setTitle("上传进度")
					.setView(view)
					.create()
					.show();