本篇将介绍“获取系统版本号”
PackageManager packageManager = getPackageManager();
// getPackageName()是你当前类的包名,0代表是获取版本信息
try {
PackageInfo packageInfo = packageManager.getPackageInfo(getPackageName(), 0);
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}