ColorChanged ViewPager 【code】

Success! oooowww yeahhhhhh!

public class MyPagerListener implements ViewPager.OnPageChangeListener {private int lastValue = -1;private int redColor = Color.parseColor("#e51c23");private int blueColor = Color.parseColor("#03a9f4");private int greenColor = Color.parseColor("#259b24");public MyPagerListener() {super();}@Overridepublic void onPageSelected(int position) {mViewPager.setCurrentItem(position);page_position = position;if (position == 1) {mViewPager.setBackgroundResource(R.color.color_light_blue);} else if (position == 2) {mViewPager.setBackgroundResource(R.color.color_red);} else if (position == 0) {mViewPager.setBackgroundResource(R.color.color_green);}}/*  * * Pager右滑，finger Right to Left positionOffset 0 to 1 *     positionOffsetPixels -- *  * Pager左滑，finger Left to Right positionOffset 1 to 0 *     positionOffsetPixels ++ */@Overridepublic void onPageScrolled(int position, float positionOffset,int positionOffsetPixels) {if (positionOffset ==0) {return;}if (lastValue > positionOffsetPixels) {// Pager左滑if (position == 0) {setPagerBg(blueColor, greenColor, 1-positionOffset);} else if (position == 1) {// Set like this will be right, but I don't know the reasonsetPagerBg(redColor, blueColor, 1-positionOffset);} else if (position == 2) {Log.e("Right2", position + "");setPagerBg(redColor, blueColor, 1-positionOffset);}} else if (lastValue < positionOffsetPixels) {// Pager右滑if (position == 0) {Log.e("Left0", position + "");setPagerBg(greenColor, blueColor, positionOffset);} else if (position == 1) {Log.e("Left1", position + "");setPagerBg(blueColor, redColor, positionOffset);} else if (position == 2) {Log.e("Left2", position + "");setPagerBg(blueColor, redColor, positionOffset);}}lastValue = positionOffsetPixels;}@Overridepublic void onPageScrollStateChanged(int position) {}public void setPagerBg(int color1, int color2, float ratio) {mViewPager.setBackgroundColor(blendColors(color1, color2,ratio));}/** * Change color1 to color2 the ratio should increase! */private int blendColors(int color1, int color2, float ratio) {final float inverseRation = 1f - ratio;float r = (Color.red(color2) * ratio)+ (Color.red(color1) * inverseRation);float g = (Color.green(color2) * ratio)+ (Color.green(color1) * inverseRation);float b = (Color.blue(color2) * ratio)+ (Color.blue(color1) * inverseRation);return Color.rgb((int) r, (int) g, (int) b);}}