Consistency of onTouch event.getX or Y on different screen sizes - Android

Question

I'm implementing an OnTouchListener on a custom view. In this view I'm drawing an object that basically moves along x and y axis I get form event.getX(); and event.getY(); respectively.

I want to perform some draw changes when touch events happen at particular positions in screen. The problem is, the values are different for different screen sizes. For example value of X value of a point on a WVGA device is 60 and on tablets it is 100. Since this is inconsistent i couldn't write a proper if condition.

Please can any one suggest a solution for this from your prior experience?

Answer 1

I basically got good ideas with both answers, (my respect) But the solution that worked for me is below. The idea is from the clue by Chintan Raghwani.

So lets say a position x value on a device screen is equal to the total view width multiplied by percentage

Example: posX = getMeasuredWidth() * 0.5 will give you touch event handled at center. Positioning objects by this way will make it consistent through all devices.

Hope it helps some one :)

EDIT :

Lucky enough to find this post. This is process above is also called as the Golden Ratio this is really a great post about this.

Answer 2

You could set the basic screen size that you want to receive touch events on ie 800 x 600. Then you can get the device's actual resolution, and scale your base amount by that. Ie the X size would be (800/ device width) you then times your device screen touch coords by this scale factor to get the "translated" version.

Answer 3

You could get any device's resolution. You can do something like, getting getWidth() and getHeigth() of screen. Then you can set logic for width/2 and heigth/2 -> gives you Left-Top portion of your screen. Do something like this.