SecurityInfoDialog.java 文件源码

private void prepareIconAnimation() {
    authenticationText.setAlpha(0.0f);
    trustText.setAlpha(0.0f);

    dialogView.addOnLayoutChangeListener(new OnLayoutChangeListener() {
        @Override
        public void onLayoutChange(View view, int i, int i1, int i2, int i3, int i4, int i5, int i6, int i7) {
            float halfVerticalPixelDifference = (trustIconFrame.getY() - authenticationIconFrame.getY()) / 2.0f;
            authenticationIconFrame.setTranslationY(halfVerticalPixelDifference);
            trustIconFrame.setTranslationY(-halfVerticalPixelDifference);

            authenticationIconFrame.animate().translationY(0)
                    .setStartDelay(ICON_ANIM_DELAY)
                    .setDuration(ICON_ANIM_DURATION)
                    .setInterpolator(new AccelerateDecelerateInterpolator())
                    .start();
            trustIconFrame.animate().translationY(0)
                    .setStartDelay(ICON_ANIM_DELAY)
                    .setDuration(ICON_ANIM_DURATION)
                    .setInterpolator(new AccelerateDecelerateInterpolator())
                    .start();
            authenticationText.animate().alpha(1.0f).setStartDelay(ICON_ANIM_DELAY + ICON_ANIM_DURATION).start();
            trustText.animate().alpha(1.0f).setStartDelay(ICON_ANIM_DELAY + ICON_ANIM_DURATION).start();

            view.removeOnLayoutChangeListener(this);
        }
    });
}