This is an excerpt from Learn by Doing - Android for Beginners on Udemy.
https://www.udemy.com/learn-by-doing-...
This lecture teaches you how to pass additional information to Activities using intents.
Things to Remember
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1. You can pass strings, integers, arrays, collections and POJOs implementing Parcelable or Serializable as extras.
2. To put additional information into your intents, use the Intent.putExtra(String, *) set of methods.
3. To retrieve an extra first get the intent that started your Activity using the Activity.getIntent() method.
4. Now use the Intent.getExtras() method or the Intent.get*Extra() set of methods to retrieve your extra.
5. Refer to this Android SDK Reference to inspect the list of put* and get* extras methods to have an elaborate idea.
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