Android PHP MySQL Login Tutorial

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Kristofer Ng

A crazy android and web developer. Passion on developing android application and exploring new technology as a hobby.

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30 Responses

  1. DF says:

    if i insert your code into my android studio the app on my phone opens, and i can enter a password and user name. but when i press the login button the app closess on my phone

  2. Kristofer Ng says:

    did you download xampp to setup your web server?

  3. jane says:

    hey hi,
    I’m getting SocketTimeoutException: timeout. I’m running the app on nexus device.
    But if I try to put the url in the browser open up to show connected.
    Can you help ?

    • Kristofer Ng says:

      url = new URL(“http://localhost/php-android-login/login.php”);
      for the url “localhost” change to your local ip address,
      it should be work.

      you can check your local ip address via command prompt by typing “ipconfig”

  4. virat says:

    When I run the code, I get this null pointer in the logcat file :

    java.lang.NullPointerException: Attempt to invoke virtual method ‘android.content.res.Resource&Theme android.content,Context.getTheme()’ c

    How to rectify this?

  5. david says:

    HI, that for the guide.
    getting error as follow:
    java.lang.NullPointerException: Attempt to invoke virtual method ‘android.content.res.Resources$Theme android.content.Context.getTheme()’ on a null object reference
    at android.app.AlertDialog.resolveDialogTheme(AlertDialog.java:222)
    at android.app.AlertDialog.(AlertDialog.java:200)
    at android.app.AlertDialog.(AlertDialog.java:196)
    at android.app.AlertDialog.(AlertDialog.java:141)
    at android.app.ProgressDialog.(ProgressDialog.java:77)

    crash upon clicking login button.
    Using Wammp server. i able to connect through android phone with other project.
    How to solve this?

  6. Rulillada says:

    url = new URL(“http://iplocal:8000/php-android-login/login.php”);
    networkstate and internet permissions

  7. Rulillada says:

    private LoginActivity loginActivity;
    private ProgressDialog pdLoading; ——-)))))))
    private HttpURLConnection conn;
    private URL url = null;

    public AsyncLogin(LoginActivity loginActivity) {
    this.loginActivity = loginActivity;
    }

    @Override
    protected void onPreExecute() {
    super.onPreExecute();
    pdLoading = new ProgressDialog(loginActivity); —-))))))) here
    //this method will be running on UI thread
    pdLoading.setMessage(“\tLoading…”);
    pdLoading.setCancelable(false);
    pdLoading.show();

    }

  8. Pieter Du Toit says:

    Hi
    I created an APK file and installed on my phone. It goes directly to login successful without displaying the login page

  9. Jay says:

    Put the source code and we will download

  10. zaid says:

    where ActivityMain.java code?

  11. Pablo says:

    i got problems with ProgressDialog it dosen’t work in
    ProgressDialog pd = new ProgressDialog(loginActivity);

  12. I have sendUserActionEvent() mView == null ………error

  13. Appoorve says:

    I have a query… I hd not followed your code bt approached in some other way and getting registration success toast but there is no data available in the database

  14. Appoorve says:

    If u r interested to help me out…. Then I should send u the screenshots
    l

  15. Jessica says:

    Hi, just want to comment a typo, you named your database as ‘androiddb’ at the beginning of the post but then you put ‘login’ as your database name in config.php

  16. Zakir Khan says:

    i got the message as application stopped working

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  19. Muhammad says:

    This helped alot thanks.

  20. Mozeago says:

    I have tried to grasp this concept from top devs but I couldn’t, all I get was errors am Happy your code worked pretty well, Good work,Keep up. Can you kindly do one on taking a photo and saving it locally to phone using sqlite database. Item, description and image (saved locally).

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