获得软件版本信息

//欲取得 软件版本号
try {
PackageInfo info = getPackageManager().getPackageInfo(getPackageName(), 0);
System.out.println(info.versionCode);

System.out.println(info.applicationInfo.loadLabel(getPackageManager()).toString());

setTitle("当前版本为:v"+info.versionCode);
} catch (NameNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}