I tried to find answer for my question, but I wasn't lucky. I have an Android app where I have thousands of points which have an altitude data and I want to draw that data in graph. What app is doing now is drawing graph data to ImageView. But I want to add zoom functionality, because when there are too many points that graph is too contracted.
I dont want to draw it to larger image and then downsample it, because it will take much memory - there can possible be many of these graphs. And I tried MPAndroidChart library to create that graph, but when there were thousands of points it drastically slowed down app.
I don't know what is the best to do. What do you think? I hope that this isn't a duplicate question and if you know that someone tried to solve this question, please let me know. Thnaks a lot.
This is complex stuff.
I can only recommand HelloCharts library that handles many things (including zoom): https://github.com/lecho/hellocharts-android