((TextView) child).setTypeface(typeface) Public void replaceFonts(ViewGroup viewTree)įor(int i = 0 i < viewTree.getChildCount() ++i) Typeface = Typeface.createFromAsset(assets, assetsFontFileName) Public FontChangeCrawler(AssetManager assets, String assetsFontFileName) Public FontChangeCrawler(Typeface typeface) Here is a simple recursive implementation of a view crawler that will replace the Typeface for any appropriate view in the hierarchy: public class FontChangeCrawler When crawling this tree, one can replace all the Typefaces on any TextViews, EditTexts, and Buttons that are encountered. This tree can be crawled by visiting child views in your favorite order (breadth first or depth first). Layouts (and sub-layouts) in Android are tree hierarchies comprised of ViewGroups as composite elements and Views as leaf nodes. This post covers a strategy that should handle your needs for common apps. Instead you must employ a strategy to set a custom Typeface on all TextViews, EditTexts, and Buttons.

Android does not provide a mechanism for using a custom font file (TTF, OTF, etc) in all areas of your app.

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