Cannot Debug my code with breakpoints

Ive tried many times to debug a specific point of my code. Ive tried to put the breakpoint in other lines, thinking the problem might be the position of the breakpoint in the code. However, everytime I try to debug with breakpoints, AndroidStudio sucessively (step over) start showing the following windows: “”, “BaseDexClassLoader.class”, “”, “” and i`ve tried many things, like File>Settings>Build,Execution,Deployment>Debugger>Stepping>Add Pattern [android.*]
All this without success.Anyone could help me, please?

To enable or disable Just My Code debugging
On the Tools menu, choose Options.
In the Options dialog box, open the Debugging node and then choose General.
Select or clear Enable Just My Code.

Ethan Stark