GradientColorHelper

gistfile1.txt

/*
 * Copyright 2013 Prateek Srivastava (@f2prateek)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.f2prateek.couchpotato.ui.util;

import android.graphics.Color;

public class GradientColorHelper {

  final int startColor;
  final int endColor;
  final int scale;

  public GradientColorHelper(int startColor, int endColor, int scale) {
    this.startColor = startColor;
    this.endColor = endColor;
    this.scale = scale;
  }

  public int getColor(double point) {
    double percentage = point / scale * 100;
    int sr = (startColor >> 16) & 0xFF;
    int sg = (startColor >> 8) & 0xFF;
    int sb = (startColor >> 0) & 0xFF;

    int er = (endColor >> 16) & 0xFF;
    int eg = (endColor >> 8) & 0xFF;
    int eb = (endColor >> 0) & 0xFF;

    int red = sr + (int) (percentage * (er - sr));
    int green = sg + (int) (percentage * (eg - sg));
    int blue = sb + (int) (percentage * (eb - sb));

    return Color.rgb(red, green, blue);
  }
}