diff --git a/app/datadir_android.go b/app/datadir_android.go
index 2804247b..db585d4a 100644
--- a/app/datadir_android.go
+++ b/app/datadir_android.go
@@ -7,6 +7,8 @@ package app
 import "C"
 
 import (
+	"os"
+	"path/filepath"
 	"sync"
 
 	"gioui.org/app/internal/window"
@@ -20,6 +22,9 @@ var (
 func dataDir() (string, error) {
 	dataDirOnce.Do(func() {
 		dataPath = window.GetDataDir()
+		// Set XDG_CACHE_HOME to make os.UserCacheDir work.
+		cachePath := filepath.Join(dataPath, "cache")
+		os.Setenv("XDG_CACHE_HOME", cachePath)
 	})
 	return dataPath, nil
 }