Callback URL example with Instagram OAuth
One of the use cases of callback URLs is OAuth. Let us do this with an Instagram Login: If the user enters their credentials and clicks the Login button, Instagram will validate the credentials and return an
access_token. We need that
access_token in our app.
For our app to be able to listen to such links, we need to add a callback URL to our
Activity. We can do this by adding an
<intent-filter/> to our
Activity, which will react to that callback URL. Assume that our callback URL is
appSchema://appName.com. Then you have to add the following lines to your desired
Activity in the Manifest.xml file:
Explanation of the lines above:
<category android:name="android.intent.category.BROWSABLE"/>makes the target activity allow itself to be started by a web browser to display data referenced by a link.
<data android:host="appName.com" android:scheme="appSchema"/>specifies our schema and host of our callback URL.
- All together, these lines will cause the specific
Activityto be opened whenever the callback URL is called in a browser.
Now, in order to get the contents of the URL in your
Activity, you need to override the
onResume() method as follows:
Now you have retrieved the
access_token from Instagram, that is used in various API endpoints of Instagram.