Скачать или смотреть Resolving Spannable String Builder Font Issues in Android

Discover how to effectively apply multiple custom fonts in your Android app using `SpannableStringBuilder` with a custom `TypefaceSpan`.
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This video is based on the question https://stackoverflow.com/q/69576770/ asked by the user 'alfietap' ( https://stackoverflow.com/u/11541512/ ) and on the answer https://stackoverflow.com/a/69577875/ provided by the user 'Zain' ( https://stackoverflow.com/u/9851608/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Resolving Spannable String Builder Font Issues in Android

When developing Android applications, you may encounter issues with SpannableStringBuilder not applying different custom fonts to text as intended. This can lead to frustration, particularly when you want to present information in a visually appealing manner, using diverse font styles within a single String. If you've found yourself stuck in this situation, don't worry! We will guide you through the solution step by step.

The Problem: Custom Fonts Not Applying

Scenario: You want to create a text element that combines two styles of text: a name in a semi-bold font and a comment in a regular font. However, after appending these styles into your SpannableStringBuilder, you find that the desired styling is not reflected in the final output. This means your string is displayed using the default font rather than your chosen custom fonts.

Here’s a snippet of the code that might be causing the issue:

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

The Solution: Using a Custom TypefaceSpan

To tackle this problem, you can create a custom class that extends TypefaceSpan to handle the typeface application correctly. Here's how you can implement that:

Step 1: Create the Custom TypefaceSpan

First, define a custom TypefaceSpan that applies the new font styles. This will ensure the fonts are applied during the drawing and measurement phases of the text rendering.

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

Step 2: Use the Custom TypefaceSpan in SpannableStringBuilder

Next, modify the original method that creates your SpannableStringBuilder to utilize the new CustomTypefaceSpan class. This allows each piece of text to be assigned its respective custom font:

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

Conclusion

By implementing a custom TypefaceSpan, you can effectively resolve issues with SpannableStringBuilder not applying different fonts as expected. Now you can create visually compelling text elements that enhance your app's user experience. If you encounter similar issues down the line, remember to check how fonts are applied using spans in your strings. Happy coding!