domsu

@Overrid
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    canvas.save();
    canvas.translate(10, 15);
    canvas.drawText("Hello world", 1, 5, p);
    canvas.restore();
}

domsu

private void loadImageWithReduction(ImageView view, int imageIndex) {
    Drawable drawable = changeColorOfDrawable(R.drawable.face_black, Color.parseColor(drawableColor[imageIndex]));
    view.setImageDrawable(drawable);
}
 
private Drawable changeColorOfDrawable(@DrawableRes int drawableResId, int color) {
    Drawable drawable = ContextCompat.getDrawable(this, drawableResId);
    drawable.mutate().setColorFilter(color, PorterDuff.Mode.SRC_IN);
 
    return drawable;

domsu

private void animateSingleView(ViewGroup windowRoot, int viewPosition, View view) {
    view.setTranslationY(windowRoot.getHeight());
    view.setAlpha(0);
 
    view.animate()
            .translationY(0)
            .alpha(1)
            .setStartDelay(START_DELAY)
            .setDuration(DURATION_INITIAL + DURATION_NEXT_VIEW_FACTOR * viewPosition)
            .setInterpolator(new DecelerateInterpolator(INTERPOLATOR_FACTOR)).start();

domsu

private void startSlideInAnimation() {
    ViewGroup windowRoot = (ViewGroup) findViewById(android.R.id.content);
    ViewGroup contentRoot = (ViewGroup) windowRoot.getChildAt(0);
 
    for (int i = 0; i < contentRoot.getChildCount(); i++) {
        View v = contentRoot.getChildAt(i);
 
        animateSingleView(windowRoot, i, v);
    }
}

domsu

private boolean animated = false;
 
@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
 
    if (hasFocus && !animated) {
        startSlideInAnimation();
        animated = true;
    }

domsu

animatorSet.start();

domsu

AnimatorSet animatorSet = new AnimatorSet();
animatorSet.play(revealAnimator).before(alphaAnimator);
animatorSet.setInterpolator(new AccelerateDecelerateInterpolator());
animatorSet.addListener(new AnimatorListenerAdapter() {
    @Override
    public void onAnimationEnd(Animator animation) {
        value.setText("0");
        overlay.remove(revealView);
    }
})

domsu

Animator alphaAnimator = ObjectAnimator.ofFloat(revealView, View.ALPHA, 0.0f);
alphaAnimator.setDuration(getResources().getInteger(android.R.integer.config_mediumAnimTime));

domsu

float radius = (float) Math.sqrt(Math.pow(container.getHeight(), 2) + Math.pow(container.getWidth(), 2));
Animator revealAnimator = ViewAnimationUtils.createCircularReveal(revealView, revealView.getWidth(), revealView.getHeight(), 0.0f, radius);
revealAnimator.setDuration(getResources().getInteger(android.R.integer.config_longAnimTime));
revealAnimator.addListener(new AnimatorListenerAdapter() {
    @Override
    public void onAnimationEnd(Animator animation) {
           value.setText("0");
    }
});

domsu

ViewGroupOverlay overlay = container.getOverlay();
 
final View revealView = new View(this);
revealView.setBottom(container.getHeight());
revealView.setRight(container.getWidth());
revealView.setBackgroundColor(ContextCompat.getColor(this, R.color.colorAccent));
 
overlay.add(revealView);