SquareImageView.java

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

public class SquaredImageView extends ImageView {

  public SquaredImageView(Context context) {
    super(context);

  }

  public SquaredImageView(Context context, AttributeSet attrs) {
    super(context, attrs);

  }

  public SquaredImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);

  }

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    setMeasuredDimension(getMeasuredWidth(), getMeasuredWidth());
  }
}