RatioImageView.java

package com.hotbitmapgg.moequest.widget;

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

public class RatioImageView extends ImageView {

  private int originalWidth;

  private int originalHeight;


  public RatioImageView(Context context) {

    super(context);
  }


  public RatioImageView(Context context, AttributeSet attrs) {

    super(context, attrs);
  }


  public RatioImageView(Context context, AttributeSet attrs, int defStyleAttr) {

    super(context, attrs, defStyleAttr);
  }


  public void setOriginalSize(int originalWidth, int originalHeight) {

    this.originalWidth = originalWidth;
    this.originalHeight = originalHeight;
  }


  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

    if (originalWidth > 0 && originalHeight > 0) {
      float ratio = (float) originalWidth / (float) originalHeight;

      int width = MeasureSpec.getSize(widthMeasureSpec);
      int height = MeasureSpec.getSize(heightMeasureSpec);

      if (width > 0) {
        height = (int) ((float) width / ratio);
      }

      setMeasuredDimension(width, height);
    } else {
      super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
  }
}