When selecting "Axis Y" = Altitude, the X axis is displayed correctly with units (distance or time). However, when selecting "Axis Y" = Speed (only), the X axis is missing the units (only the text "Distance (km)" / "Time (min)" is shown, but no numbers)
I know about it .. I already created issue on google.code page of chart library here ... http://code.google.com/p/achartengine/i ... tail?id=95 (http://code.google.com/p/achartengine/issues/detail?id=95)