Example usage for android.animation ArgbEvaluator evaluate

Introduction

In this page you can find the example usage for android.animation ArgbEvaluator evaluate.

Prototype

public Object evaluate(float fraction, Object startValue, Object endValue) 

Source Link

Document

This function returns the calculated in-between value for a color given integers that represent the start and end values in the four bytes of the 32-bit int.

Usage

From source file:com.geecko.QuickLyric.utils.ScreenSlidePagerAdapter.java

@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
    View tutorialLayout = mActivity.findViewById(R.id.tutorial_layout);
    ArgbEvaluator evaluator = new ArgbEvaluator();
    Object background = position < getCount() - 1
            ? evaluator.evaluate(positionOffset, mActivity.getResources().getColor(colors[position]),
                    mActivity.getResources().getColor(colors[position + 1]))
            : mActivity.getResources().getColor(colors[position]);
    tutorialLayout.setBackgroundColor((int) background);
    ((MainActivity) mActivity).setNavBarColor(
            (int) evaluator.evaluate(0.5f, mActivity.getResources().getColor(R.color.action_dark), background));
    ((MainActivity) mActivity).setStatusBarColor(
            (int) evaluator.evaluate(0.5f, mActivity.getResources().getColor(R.color.action_dark), background));
}

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From source file:pl.kodujdlapolski.na4lapy.ui.introduction.IntroductionActivity.java

private void initPageChangeListener() {
    final ArgbEvaluator evaluator = new ArgbEvaluator();
    viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override/*from  ww  w.j  ava 2 s.co m*/
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            int fromColor = introductionPages.get(position).getBgColor();
            int toColor = introductionPages.get(position + 1).getBgColor();
            int colorUpdate = (Integer) evaluator.evaluate(positionOffset, fromColor, toColor);
            introductionContainer.setBackgroundColor(colorUpdate);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                getWindow().setNavigationBarColor(colorUpdate);
            }
        }

        @Override
        public void onPageSelected(int position) {
            currentPage = position;
            updateIndicators(currentPage);
            if (position == LAST_INTRO) {
                introductionContainer.setBackgroundColor(
                        ContextCompat.getColor(IntroductionActivity.this, android.R.color.transparent));
                nextBtn.setVisibility(View.GONE);
                finishBtn.setVisibility(View.GONE);
                skipBtn.setVisibility(View.GONE);
                onFinish();
            } else {
                boolean lastPage = position == LAST_INTRO - 1;
                nextBtn.setVisibility(lastPage ? View.GONE : View.VISIBLE);
                finishBtn.setVisibility(lastPage ? View.VISIBLE : View.GONE);
            }
        }

        @Override
        public void onPageScrollStateChanged(int state) {
        }
    });
}

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From source file:com.geecko.QuickLyric.adapter.IntroScreenSlidePagerAdapter.java

@SuppressWarnings({ "deprecation", "ResourceAsColor" })
@Override//from w w  w .jav a 2  s .  c o m
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
    View tutorialLayout = mActivity.findViewById(R.id.tutorial_layout);
    ArgbEvaluator evaluator = new ArgbEvaluator();
    Object background = position < getCount() - 1
            ? evaluator.evaluate(positionOffset, mActivity.getResources().getColor(colors[position]),
                    mActivity.getResources().getColor(colors[position + 1]))
            : mActivity.getResources().getColor(colors[position]);
    tutorialLayout.setBackgroundColor((int) background);
    MainActivity.setNavBarColor(mActivity.getWindow(), mActivity.getTheme(),
            (int) evaluator.evaluate(0.5f, mActivity.getResources().getColor(R.color.action_dark), background));
    MainActivity.setStatusBarColor(mActivity.getWindow(), mActivity.getTheme(),
            (int) evaluator.evaluate(0.5f, mActivity.getResources().getColor(R.color.action_dark), background));

    View bigFab = tutorialLayout.findViewById(R.id.big_fab);
    View handImage = tutorialLayout.findViewById(R.id.musicid_demo_hand_image);
    View soundImage = tutorialLayout.findViewById(R.id.musicid_demo_sound_image);
    View redKey = tutorialLayout.findViewById(R.id.intro_4_red_key);
    View yellowKey = tutorialLayout.findViewById(R.id.intro_4_yellow_key);
    View gearA = tutorialLayout.findViewById(R.id.redGear);
    View gearB = tutorialLayout.findViewById(R.id.blueGear);

    BubblePopImageView tableImageView = (BubblePopImageView) tutorialLayout.findViewById(R.id.table);
    position = rightToLeft ? getCount() - 1 - position : position;
    if (rightToLeft && positionOffset > 0.0) {
        position -= 1;
        positionOffset = 1f - positionOffset;
        positionOffsetPixels = (int) (positionOffset * mPager.getWidth());
    }

    switch (position) {
    case 0:
        if (tableImageView != null) {
            tableImageView.setProgress(positionOffset);
            tableImageView.setTranslationX((rightToLeft ? -1f : 1f) * (1f - positionOffset)
                    * (tableImageView.getMeasuredWidth() / 3f));
        }
        break;
    case 1:
        if (tableImageView != null) {
            tableImageView.setProgress(1f);
            tableImageView.setTranslationX((rightToLeft ? 0.15f : -0.4f) * positionOffsetPixels);
        }
        if (bigFab != null) {
            bigFab.setTranslationX(
                    (rightToLeft ? -1f : 1f) * (1f - positionOffset) * (bigFab.getMeasuredWidth() / 3f));
            if (mCurrentPage == 1 ^ rightToLeft)
                bigFab.setRotation(positionOffset * 360f);
            else
                bigFab.setRotation((1f - positionOffset) * 360f);
        }
        break;
    case 2:
        if (bigFab != null)
            ((View) bigFab.getParent()).setTranslationX((!rightToLeft ? -0.4f : 0.4f) * positionOffsetPixels);
        if (soundImage != null && handImage != null) {
            soundImage.setTranslationX(300f - 300f * positionOffset);
            handImage.setTranslationX(-400f + 400f * positionOffset);
        }
        break;
    case 3:
        if (redKey != null && yellowKey != null) {
            if (redKey.getMeasuredHeight() < redKey.getResources().getDimensionPixelSize(R.dimen.dp) * 15) {
                redKey.setVisibility(View.INVISIBLE);
                yellowKey.setVisibility(View.INVISIBLE);
                break;
            } else {
                redKey.setVisibility(View.VISIBLE);
                yellowKey.setVisibility(View.VISIBLE);
            }
            redKey.setTranslationY(330f * (1 - positionOffset));
            yellowKey.setTranslationY(290f * Math.min(1.3f * (1 - positionOffset), 1.0f));
            yellowKey.setTranslationX(105f * Math.min(1.3f * (1 - positionOffset), 1.0f));
        }
        if (3 == count - 2 && gearA != null && gearB != null) {
            gearA.setRotation(-180f * positionOffset);
            gearB.setRotation(180f * positionOffset);
        }
        break;
    case 4:
        if (gearA != null && gearB != null) {
            gearA.setRotation(-180f * positionOffset);
            gearB.setRotation(180f * positionOffset);
        }
        break;
    }
}

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