android获取app的版本信息

<span style="font-size:14px;">

public static int getCurrentVersionCode(Context context) {
PackageManager packageManager = context.getPackageManager();
try {
PackageInfo packInfo = packageManager.getPackageInfo(
context.getPackageName(), 0);
//packInfo.versionName版本名称
return packInfo.versionCode;
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
return -1;
}</span>