获取应用版本号

public class VersionUtil {
public static final String TAG = VersionUtil.class.getSimpleName();

private VersionUtil() {
throw new UnsupportedOperationException(TAG + "无需实例化");
}

/**
* 获取应用版本号
*/
public static String getVersionName(Context context) {
PackageInfo pi = null;
try {
pi = context.getPackageManager().getPackageInfo(context.getPackageName(),
PackageManager.GET_ACTIVITIES);
} catch (NameNotFoundException e) {
e.printStackTrace();
}

return pi.versionName;
}
}