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Step 2 - Logging in the User

In the next step users will be asked to fill in the password for the particular HAT Address:

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This screen cannot be modified in any way. Users have to insert the password for the specified HAT and tap LOGIN

Note that the complete address is served via SSL, contains the name of the HAT as well as the application parameters - application name, redirect url and fallback redirect url.

By tapping LOGIN the authentication process will begin. HAT will use one of the two redirect url that were included in the request, success redirect if everything went ok or fallbackRedirectURL if an error occurred. The application has to know how to respond in both scenarios.

In order to achieve that we have to add the success redirect and fallbackRedirectURL to the AndroidManifest file in the project.

In order to add them to the AndroidManifest file you have to add the Key URL Types as a data.

<activity name="MainActivity" >
  <intent-filter>
    <data
        android:host="hatappfailed"
        android:scheme="hatapp" />
  </intent-filter>
</activity>

This will be the url scheme of the your app. That means every time Android intercepts a URL starting with this value, like test://host will hand the process to your app and your app will be responsible to either launch or not.