Android图像处理之冰冻效果

                    原图                                                                          效果图

代码：

package com.color;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.ImageView;

public class ColorView extends ImageView {

    private Paint myPaint = null;
    private Bitmap bitmap = null;
    private int width, height;
    private int[] oldPixels;
    private int[] newPixels;
    private int color, color2;
    private int pixelsR, pixelsG, pixelsB, pixelsA, pixelsR2, pixelsG2,
            pixelsB2;

    public ColorView(Context context, AttributeSet attrs) {
        super(context, attrs);
        bitmap = BitmapFactory.decodeResource(context.getResources(),
                R.drawable.ww);
        width = bitmap.getWidth();
        height = bitmap.getHeight();
        oldPixels = new int[width * height];
        newPixels = new int[width * height];
        invalidate();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        // 获取像素
        bitmap.getPixels(oldPixels, 0, width, 0, 0, width, height);

        for (int i = 1; i < height * width; i++) {
            color = oldPixels[i];
            // 获取RGB分量
            pixelsA = Color.alpha(color);
            pixelsR = Color.red(color);
            pixelsG = Color.green(color);
            pixelsB = Color.blue(color);
            //R
            int pixel = pixelsR - pixelsG - pixelsB;
            pixel = pixel * 3 / 2;
            if (pixel < 0) {
                pixel = -pixel;
            }
            if (pixel > 255){
                pixel = 255;
            }
            pixelsR = pixel; // 计算后重置R值，以下类同
            //G
            pixel = pixelsG - pixelsR - pixelsB;
            pixel = pixel * 3 / 2;
            if (pixel < 0) {
                pixel = -pixel;
            }
            if (pixel > 255){
                pixel = 255;
            }
            pixelsG = pixel;
            //B
            pixel = pixelsB - pixelsR - pixelsG;
            pixel = pixel * 3 / 2;
            if (pixel < 0) {
                pixel = -pixel;
            }
            if (pixel > 255){
                pixel = 255;
            }
            pixelsB = pixel;

            // 根据新的RGB生成新像素
            newPixels[i] = Color.argb(pixelsA, pixelsR, pixelsG, pixelsB);

        }
        // 根据新像素生成新图片
        bitmap.setPixels(newPixels, 0, width, 0, 0, width, height);
        canvas.drawBitmap(bitmap, 0, 0, myPaint);
    }
}

参考博文：点击打开链接