AtFab.java 文件源码

/**
 * Hides the FAB.
 */
@Override
public void hide() {
    // Only use scale animation if FAB is visible
    if (getVisibility() == View.VISIBLE) {
        // Pivots indicate where the animation begins from
        float pivotX = getPivotX() + getTranslationX();
        float pivotY = getPivotY() + getTranslationY();

        // Animate FAB shrinking
        ScaleAnimation anim = new ScaleAnimation(1, 0, 1, 0, pivotX, pivotY);
        anim.setDuration(FAB_ANIM_DURATION);
        anim.setInterpolator(getInterpolator());
        startAnimation(anim);
    }
    setVisibility(View.INVISIBLE);
}