我怎么才能从安卓中知道其包名的其他应用中获取uid呢？

import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;

public class AppUtils {
    public static int getUidFromPackageName(Context context, String packageName) {
        try {
            PackageManager packageManager = context.getPackageManager();
            ApplicationInfo applicationInfo = packageManager.getApplicationInfo(packageName, 0);
            return applicationInfo.uid;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return -1;
    }
}

String packageName = "com.example.otherapp";
int uid = AppUtils.getUidFromPackageName(context, packageName);