How would I go implementing a fixed aspect ratio View? I'd like to have items with 1:1 aspect ratio in a GridView. I think it's better to subclass the children than the GridView?
EDIT: I assume this needs to be done programmatically, that's no problem. Also, I don't want to limit the size, only the aspect ratio.
I recently made a helper class for this very problem and wrote a blog post about it.
The meat of the code is as follows:
/**
* Measure with a specific aspect ratio<br />
* <br />
* @param widthMeasureSpec The width <tt>MeasureSpec</tt> passed in your <tt>View.onMeasure()</tt> method
* @param heightMeasureSpec The height <tt>MeasureSpec</tt> passed in your <tt>View.onMeasure()</tt> method
* @param aspectRatio The aspect ratio to calculate measurements in respect to
*/
public void measure(int widthMeasureSpec, int heightMeasureSpec, double aspectRatio) {
int widthMode = MeasureSpec.getMode( widthMeasureSpec );
int widthSize = widthMode == MeasureSpec.UNSPECIFIED ? Integer.MAX_VALUE : MeasureSpec.getSize( widthMeasureSpec );
int heightMode = MeasureSpec.getMode( heightMeasureSpec );
int heightSize = heightMode == MeasureSpec.UNSPECIFIED ? Integer.MAX_VALUE : MeasureSpec.getSize( heightMeasureSpec );
if ( heightMode == MeasureSpec.EXACTLY && widthMode == MeasureSpec.EXACTLY ) {
/*
* Possibility 1: Both width and height fixed
*/
measuredWidth = widthSize;
measuredHeight = heightSize;
} else if ( heightMode == MeasureSpec.EXACTLY ) {
/*
* Possibility 2: Width dynamic, height fixed
*/
measuredWidth = (int) Math.min( widthSize, heightSize * aspectRatio );
measuredHeight = (int) (measuredWidth / aspectRatio);
} else if ( widthMode == MeasureSpec.EXACTLY ) {
/*
* Possibility 3: Width fixed, height dynamic
*/
measuredHeight = (int) Math.min( heightSize, widthSize / aspectRatio );
measuredWidth = (int) (measuredHeight * aspectRatio);
} else {
/*
* Possibility 4: Both width and height dynami