Hi, I am creating an app that show some histograms off your traveling speed in different time periods (histogram for the last minutte, histogram for the last 2 minuttes etc.)
I would like to have an animation, and have discovered that drawing everything takes arround 300-400ms. wich is to long for making my animation smooth, the animation itself is quite simple (2 lines and 2 dots). What i draw every frame right now is 20 antialised strings, size 14, in average ~5chars 8 of these strings will change every second. 1 of the string will change with the animation (this will become 5 strings if there is time) the main part of the screen, the one showing the histogram data, consist of a lots of squares wich needs to be updated every second. (450 squares) the presentation is split into 5 frames in the same view (has to be same view as arrows in one frame might point into another frame) invalidating only a part off the screen makes almost no difference (it does becomas a bit faster, but i still execute all my drawing stuff). I have tried to add a flag wheter or not the main part is dirty, but if i don't draw it, it is cleared. I might be missing something here... One possibility could be to render all the mostly static stuff to a bitmap, and then simply draw the bitmap. that would mean 10 strings only had to rendered on orientation change. I think it would make sence since the slowest rutine is the one drawing all the text. (the following is a typical timing for the drawing rutines, accmulated). V/HMMULTIBAR( 352): 0 - Drawing time: 0 ms V/HMMULTIBAR( 352): 1 - Drawing time: 53 ms V/HMMULTIBAR( 352): 2 - Drawing time: 62 ms V/HMMULTIBAR( 352): 3 - Drawing time: 85 ms V/HMMULTIBAR( 352): 4 - Drawing time: 280 ms V/HMMULTIBAR( 352): 5 - Drawing time: 303 ms I would really appreciate comments about wheter or not offscreen rendering is the way to go, or if there is a simpler way. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
