dimens.xml 

<resources>
    <!-- Default screen margins, per the Android Design guidelines. -->
    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>
</resources>



SIMPLE LOGIN APPS EXAMPLE WITH PHP WEBSRVICE


http://androidstraining.blogspot.com/2016/08/simple-login-apps-example-with-php.html



Android AsyncTask to fetch PHP file without using any library




http://androidcss.com/android/android-fetch-php-without-library/









Login and Registration in Android using PHP and MySQL

CREATE TABLE `member` (
  `user_id` int(11) NOT NULL,
  `username` varchar(50) NOT NULL,
  `full_name` varchar(50) NOT NULL,
  `password` varchar(50) NOT NULL,
  `created_date` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP
) 








ALTER TABLE `member`



  ADD PRIMARY KEY (`user_id`),



  ADD UNIQUE KEY `username` (`username`);







ALTER TABLE `member`



  MODIFY `user_id` int(11) NOT NULL AUTO_INCREMENT;



COMMIT;



http://www.androiddeft.com/2018/01/21/login-registration-android-php-mysql/





Android Login and Registration With PHP MySQL


https://www.journaldev.com/12607/android-login-registration-php-mysql







You don't have permission to access / on this server 100% fix!!!
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