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Learn how to pass data between activities in your Android app using Intents and Bundle objects. Follow our step-by-step guide to seamless data transfer in Android development.
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How to Pass Data Between Activities in Your Android App

When building Android applications, it's often necessary to pass data from one activity to another. This is a common requirement for activities that display different pieces of information or need to handle user inputs. Fortunately, Android provides a straightforward way to do this through the use of Intents and Bundle objects. In this post, we'll guide you on how to achieve this seamlessly.

Using Intents to Pass Data

Intents are the standard way to navigate between activities and pass data. Here’s a step-by-step guide on how to use them:

Step 1: Create an Intent

You first need to create an Intent to navigate from one activity to another:

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Step 2: Put Extra Data

Use the putExtra method of the Intent object to pass data. For example, if you want to pass a String and an int:

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Step 3: Start the Activity

Start the activity using the startActivity method:

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Retrieving Data in the Target Activity

Once you have navigated to the target activity, you can retrieve the data as follows:

Step 4: Get the Intent

In the onCreate method of the target activity, retrieve the Intent that started the activity:

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Step 5: Extract the Extra Data

Use the getStringExtra and getIntExtra methods to extract the data:

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Using Bundle for Complex Data

If you need to pass more complex data structures, you can use a Bundle object to encapsulate multiple pieces of data:

Step 1: Create a Bundle

Create a Bundle and put your data into it:

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Step 2: Attach Bundle to Intent

Attach the Bundle to your Intent:

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Step 3: Retrieve Bundle in Target Activity

In the target activity's onCreate method, retrieve the Bundle from the Intent:

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Final Thoughts

Passing data between activities in Android is a fundamental skill every developer should master. By effectively using Intents and Bundles, you can ensure the smooth flow of data within your app, making it more robust and user-friendly. Start implementing these techniques in your projects today and take your app interactions to the next level!