Скачать или смотреть How to Set the CardView Background Color in Android Using Java

Learn how to easily change the background color of `CardView` in Android based on database information. Get step-by-step guidance for implementing this feature correctly in your app!
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This video is based on the question https://stackoverflow.com/q/72955765/ asked by the user 'Chad Davis' ( https://stackoverflow.com/u/14037141/ ) and on the answer https://stackoverflow.com/a/72955872/ provided by the user 'Halil Sahin' ( https://stackoverflow.com/u/8369150/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Changing the CardView Background Color in Android: A Simple Guide

The ability to customize the appearance of UI components is essential for creating appealing and user-friendly applications. In Android, CardView is commonly used for displaying information in a card-style layout. However, developers often face challenges when trying to change the background color of CardView based on certain conditions, such as data from a database. In this post, we’ll address a common issue: how to properly set the background color of a CardView in Java.

The Problem

You might find yourself working with a RecyclerView that utilizes CardView to showcase a list of items. You may want to dynamically change the card color based on specific data attributes fetched from the database. Here is an example code snippet demonstrating a troubling attempt to change the card color:

[[See Video to Reveal this Text or Code Snippet]]

As you can see, the issue lies with the method being used to set the color. Instead of achieving the desired output, this code snippet generates an error because it incorrectly uses getCardBackgroundColor() method for the purpose of setting the background color.

The Solution

To change the background color of a CardView, natively within Android using Java, use the setCardBackgroundColor() method. This method explicitly sets the background color of the CardView to the desired color. Here's how you can do it properly:

Step-by-Step Implementation

Identify the CardView: Make sure you are referencing the correct CardView you want to customize.

Choose the Correct Method: Use setCardBackgroundColor() instead of getCardBackgroundColor().

Specify the Color: Provide a predefined color from the Color class.

Here’s the revised code snippet that correctly changes the CardView color:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Code

holder.tvvoiceName.setText(model.getName());: This line sets the name text on the TextView.

holder.tvvoiceTime.setText(model.getTime());: This sets the time text for the respective item.

The if statement if(model.getPremium() == 1) checks a condition from the data model.

holder.voice_item.setCardBackgroundColor(Color.RED);: This line sets the background color of the CardView to red if the condition is met.

Conclusion

By utilizing the setCardBackgroundColor() method, you can easily customize your CardView backgrounds based on specific conditions in your data models. This small adjustment can greatly enhance the visual representation of your application. So next time you're looking to change a CardView background color, remember the importance of using the correct method.

Now that you have the solution, feel free to implement this in your application and observe how it improves the user experience. Happy coding!