change View Color - Android Graphics

Android examples for Graphics:Change Color

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Description

change View Color

Demo Code


//package com.java2s;
import android.view.View;

public class Main {
    /**/*w ww . j  a  va  2 s.c om*/
     * @param view change view background
     * @param arrColorFrom rgb value in int array
     * @param arrColorTo rgb value in int array
     * @param value change value
     */
    static public void changeColor(final View view,
            final long[] arrColorFrom, final long[] arrColorTo,
            final float value) {
        if (view == null || arrColorFrom == null || arrColorTo == null
                || arrColorFrom.length <= 0 || arrColorTo.length <= 0)
            return;

        int color[] = new int[arrColorFrom.length];
        for (int i = 0; i < arrColorFrom.length; i++) {

            if (arrColorFrom[i] > arrColorTo[i]) {
                float val = arrColorFrom[i] - value;

                if (arrColorTo[i] <= val) {
                    color[i] = (int) val;
                }
            } else if (arrColorFrom[i] < arrColorTo[i]) {
                float val = arrColorFrom[i] + value;

                if (arrColorTo[i] >= val) {
                    color[i] = (int) val;
                }
            }

        }
        String backround = new String();
        backround += Integer.toHexString(0xFF);
        for (int i = 0; i < color.length; i++) {
            long val = color[i];
            long to = 0x10;
            if (val > 0x0F && val <= 0xFF) {
                to = val;
            } else {
                to = arrColorTo[i];
            }
            backround += Long.toHexString(to > 0x0F ? to : 0x10);
        }
        long setColor = Long.valueOf(backround, 16);

        view.setBackgroundColor((int) setColor);
    }

    /**
     * @param arrColorFrom
     * @param arrColorTo
     * @param value
     * @return changed color value in long 
     */
    static public int changeColor(final long[] arrColorFrom,
            final long[] arrColorTo, final float value) {
        if (arrColorFrom == null || arrColorTo == null
                || arrColorFrom.length <= 0 || arrColorTo.length <= 0)
            return 0xFFFFFFFF;

        int color[] = new int[arrColorFrom.length];
        for (int i = 0; i < arrColorFrom.length; i++) {

            if (arrColorFrom[i] > arrColorTo[i]) {
                float val = arrColorFrom[i] - value;

                if (arrColorTo[i] <= val) {
                    color[i] = (int) val;
                }
            } else if (arrColorFrom[i] < arrColorTo[i]) {
                float val = arrColorFrom[i] + value;

                if (arrColorTo[i] >= val) {
                    color[i] = (int) val;
                }
            }

        }
        String backround = new String();
        backround += Integer.toHexString(0xFF);
        for (int i = 0; i < color.length; i++) {
            long val = color[i];
            long to = 0x10;
            if (val > 0x0F && val <= 0xFF) {
                to = val;
            } else {
                to = arrColorTo[i];
            }
            backround += Long.toHexString(to > 0x0F ? to : 0x10);
        }
        long setColor = Long.valueOf(backround, 16);

        return (int) setColor;
    }
}

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