学步园

Intent startMain = new Intent(Intent.ACTION_MAIN);
										startMain.addCategory(Intent.CATEGORY_HOME);
										startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
										startActivity(startMain);
										System.exit(0);

http://blog.sina.com.cn/s/blog_623e31d90100up18.html

http://blog.csdn.net/liu_zhen_wei/article/details/6988820