Android Open Source - iwannawatch-android Dynamic Height Image View

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Back to project page iwannawatch-android.

License

The source code is released under:

MIT License

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Java Source Code

package com.meoyawn.iwannawatch;
//from  w  ww.j a  v  a  2 s  .  c o m
import android.content.Context;
import android.util.AttributeSet;
import android.widget.ImageView;

import lombok.Getter;

/**
 * An {@link android.widget.ImageView} layout that maintains a consistent width to height aspect ratio.
 */
public class DynamicHeightImageView extends ImageView {

    private         double mHeightRatio;
    private @Getter int    calculatedWidth;

    public DynamicHeightImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public DynamicHeightImageView(Context context) {
        super(context);
    }

    public void setHeightRatio(double ratio) {
        if (ratio != mHeightRatio) {
            mHeightRatio = ratio;
            requestLayout();
        }
    }

    public double getHeightRatio() {
        return mHeightRatio;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        if (mHeightRatio > 0.0) {
            // set the image views size
            calculatedWidth = MeasureSpec.getSize(widthMeasureSpec);
            int height = (int) (calculatedWidth * mHeightRatio);
            setMeasuredDimension(calculatedWidth, height);
        } else {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }
}

Java Source Code List