Hello. I am developing an application for online radio listening. But I have two problems that I can not solve: The first error is very problematic because when I give the play "play" button is activated stop "stop." So far so good, but if I press the Stop button before you start playing the audio, you stop off and activates the play but the application continues to play. This should not happen. I want the button to be pressed to activate when you begin to hear the audio, not when it starts to load. The second is related to the ProgressBar. I do not know why it does not load the progress bar. If it shows but not charging.