get Highlight Color From Background - Android Graphics

Android examples for Graphics:Color

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Description

get Highlight Color From Background

Demo Code


//package com.java2s;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.view.View;

public class Main {
    public static int getHighlightColorFromBackground(
            final Activity activity) {
        int incolor = Color.BLACK;
        final Bitmap screenshot1px = getScaledScreenshot(activity, 1, 1,
                false);/*from www  . j  ava  2 s.co  m*/
        if (null != screenshot1px) {
            incolor = screenshot1px.getPixel(0, 0);
        }
        return getHighlightColor(incolor);
    }

    public static Bitmap getScaledScreenshot(final Activity activity,
            int scaleWidth, int scaleHeight, boolean relativeScaleIfTrue) {
        final View someView = activity.findViewById(android.R.id.content);
        final View rootView = someView.getRootView();
        final boolean originalCacheState = rootView.isDrawingCacheEnabled();
        rootView.setDrawingCacheEnabled(true);
        rootView.buildDrawingCache(true);

        final Bitmap original = rootView.getDrawingCache();
        Bitmap scaled = null;
        if (null != original && original.getWidth() > 0
                && original.getHeight() > 0) {
            if (relativeScaleIfTrue) {
                scaleWidth = original.getWidth() / scaleWidth;
                scaleHeight = original.getHeight() / scaleHeight;
            }
            if (scaleWidth > 0 && scaleHeight > 0) {
                scaled = Bitmap.createScaledBitmap(original, scaleWidth,
                        scaleHeight, false);
            }
        }
        if (!originalCacheState) {
            rootView.setDrawingCacheEnabled(false);
        }
        return scaled;
    }

    public static int getHighlightColor(int sampleColor) {
        // Set a constant value level in HSV, in case the averaged color is too light or too dark.
        float[] hsvBackground = new float[3];
        Color.colorToHSV(sampleColor, hsvBackground);
        hsvBackground[2] = 0.3f; // value parameter

        return Color.HSVToColor(0xf2, hsvBackground);
    }
}

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