(The ninth episode of the Android Development Video Tutorial: Button's mixed image and text buttons This series of videos mainly introduces the software development of the Android platform. Each episode lasts about half an hour. The resolution is 1024x768 in AVI format. I hope you can enjoy it. This series of videos is updated about five times a week. This series of tutorials will be learned by developers with a certain foundation, and more importantly, it will explain the knowledge points in the Android development process through project examples.)