how can I draw a chart with a pointer that points to a point in the graph and returns the information for that point. the pointer is movable. I want to show information about the specified point below the chart.
Check out the following libraries:
https://github.com/PhilJay/MPAndroidChart
https://github.com/diogobernardino/WilliamChart
https://github.com/lecho/hellocharts-android
They are beautiful and perhaps they have what you need.