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Editorial Team
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Asked: 2026-05-31T04:38:33+00:00

I’m working on an Android game where the main screen is similar to Words

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I’m working on an Android game where the main screen is similar to Words with Friends- a grid of multiple bitmap tiles. The problem I have is with scrolling (up, down, left, right) and pinch to zoom.

Right now I’m using a surfaceview to output the tiles. To implement scrolling, I calculate the difference between touch_down and touch_up, shift the index of the top left tile accordingly, and then redraw the grid.

The problem with this is that I have to wait until the user releases their touch to move the screen, instead of a smooth scroll. I haven’t implemented pinch to zoom yet but I would run into the same problem there as well.

Is there a better way to do this?

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1 Answer

  1. Editorial Team

    Why not use MotionEvent.ACTION_MOVE which gets fired off every time the user moves their finger on the screen instead of MotionEvent.ACTION_DOWN or MotionEvent.ACTION_UP which only get fired on the touch down and touch up.

    Just keep track of the pointer position between ACTION_MOVE events and use that information to move the game board.

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