Android imageview subclass which maintains a square aspect ratio.

SquareImageView.java

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ImageView;

public class SquareImageView extends ImageView {

  public SquareImageView(Context context) {
		super(context);
	}
	
	public SquareImageView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}
	
	public SquareImageView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
	}
	
	@Override
	protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec) {
	    int width = getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec);
	    setMeasuredDimension(width,width);
	}
}