XAxis label angle in MPAndroidChart

Original answer:

Unfortunately it is currently not possible to rotate the values on the x-axis of a chart to a certain degree / angle. You will have to implement such a feature yourself.

UPDATE:

As of v2.1.5 this feature is now available:

 XAxis xAxis = chart.getXAxis();
 xAxis.setLabelRotationAngle(...);

do it simply by

    XAxis xAxis=barChart.getXAxis();
    xAxis.setLabelRotationAngle(-45);