ButtonIcon.java

package com.gc.materialdesign.views;

import android.R;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.drawable.ColorDrawable;
import android.util.AttributeSet;
import android.view.MotionEvent;
import com.gc.materialdesign.utils.Utils;

public class ButtonIcon extends ButtonFloat {

    public ButtonIcon(Context context, AttributeSet attrs) {
        super(context, attrs);
        try {
            setBackground(new ColorDrawable(getResources().getColor(R.color.transparent)));
        } catch (NoSuchMethodError e) {
            setBackgroundDrawable(new ColorDrawable(getResources().getColor(R.color.transparent)));
        }
        rippleSpeed = Utils.dpToPx(2, getResources());
        rippleSize = Utils.dpToPx(5, getResources());
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        boolean returnBool = super.onTouchEvent(event);
        if (x != -1) {
            x = getWidth() / 2;
            y = getHeight() / 2;
        }
        return returnBool;
    }

    @Override
    protected void onDraw(Canvas canvas) {
        if (x != -1) {
            Paint paint = new Paint();
            paint.setAntiAlias(true);
            paint.setColor(makePressColor());
            canvas.drawCircle(x, y, radius, paint);
            if (radius > getHeight() / rippleSize)
                radius += rippleSpeed;
            if (radius >= getWidth() / 2 - rippleSpeed) {
                x = -1;
                y = -1;
                radius = getHeight() / rippleSize;
                if (onClickListener != null && clickAfterRipple)
                    onClickListener.onClick(this);
            }
            invalidate();
        }
    }

    @Override
    protected int makePressColor() {
        return backgroundColor;
    }

}