Two Free Tools for Android Developer
This free online tool generates buttons code as well as XML drawable code for Android Apps which load faster compare to normal png buttons. You can customize button properties in setting panel and get source code.
Creating different icon types in several densities, with the right gradient color, shadow, borders, selected/unselected state etc, can be quite time-consuming. This is a great tool for Android Developers that need to build the icons for their application within a few minutes. The Android Asset Studio has several tools in it including
Action bar and tab icons
Navigation drawer indicator
It is best to use it in Chrome.