//获取版本号
protected StringgetVersion() {
String versionName ="";
try {
PackageManager pm =this.getPackageManager();
PackageInfo pi = pm.getPackageInfo(this.getPackageName(), PackageManager.GET_ACTIVITIES);
if (pi !=null) {
versionName = pi.versionName ==null ?"null" : pi.versionName;
}
} catch (PackageManager.NameNotFoundException e) {
}
return versionName;
}
