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Access Activity class from View

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So, it begins! This is the first on this blog!

Let’s start with a Android Programming tip: how to access the Activity from an instantiated View object.

The first thing to do is consider if you really need to call an Activity from a View. Take some time to analyze your classes and their relationships. Probably, the variable/method you need to access doesn’t have to be a member of the Activity class. In that case, think about placing that variable/method inside the View or create a new class that has variables/methods which can be accessed by both Activity and View. Unless an Activity variable or method (e.g. Activity.finish() ) needs to be called from the View, there is no need to try to access the Activity from the current View.

But if you need to access a method/variable of the calling Activity from the View, here is how it’s done:

Assuming that you need to call the finish() method at Activity1 from View1:


This is why the code above works: Activity1 is a child of the Activity class, which has Context as a parent. Due to polymorphism, a cast to Activity1 could be added to the method getContext() so it returns Activity1 instead of Context (Activity1 is a child of Context).

Using this method a View can access any public member from the Activity, not only the finish() method. This isn’t the best alternative, but sometimes, when programming a graphically intensive application like a game; it’s good to have access the Activity from the View.

9 Comments to “Access Activity class from View”

  1. Tom says:

    You have no idea how long I have been looking for this simple solution. Thank you so much, I freaking love you.

  2. Camille says:

    Great simple article. I was also searching for this solution. I never thought to cast the Context object to my Activity object. Thanks for this.

  3. Biswajit says:

    Great article boss.Thank you.

  4. Michele says:


  5. Justin says:

    Note that this approach does not always work, so be careful when doing this:

    According to Romain Guy (an Android framework engineer), the context of a view is not always guaranteed to be an activity.

  6. piggy says:

    Simple + Work = Great!

  7. Pedro Oliveira says:

    Fantastic! You’re the best!

  8. ^CHAMPi^ says:

    Really good article! Thanx for sharing this ;)

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