How do I make 2 characters overlap each other in an Android EditText

I am making a music notation app for Android for one of my school projects.

• In this app, I don't have a music notation rendering mechanism. Instead, I use a font, which has all different notes in different heights with the music sheet lines in place. This way, all I need to do is to insert characters into an EditText view.
• Lately, I found out that I couldn't have 2 notes playing at the same time with this method.

I'd like to know if there is a way for 2 characters to overlap each other in an EditText view, so that 2 notes with different heights can be displayed in the same column.

Alternatively, if anyone knows of a library for rendering music on Android, please share the knowledge with me.

Use a SurfaceView with the necessary music PNG bitmaps. You can find a lot of the needed bitmaps here, assuming your project can handle whatever open source license Wikibooks uses. If it can't, I'm sure you can find music bitmaps elsewhere.