android.widget.FrameLayout#getHeight ( )源码实例Demo

/**
 * Starts the circular reveal of the preview with an overlay above that fades out
 */
private void startCircularReveal(final FrameLayout previewView,
                                 final View overlayView,
                                 final View morphView) {
    isMorphingToShow = true;

    float startRadius = previewView.getHeight() / 2f;
    float endRadius = getRadius(previewView);
    long duration = morphShowDuration;

    morphAnimator = ViewAnimationUtils.createCircularReveal(previewView,
            getCenterX(previewView),
            getCenterY(previewView),
            startRadius,
            endRadius);
    morphAnimator.setTarget(previewView);
    morphAnimator.setInterpolator(new AccelerateInterpolator());
    morphAnimator.setDuration(duration);
    morphAnimator.addListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            super.onAnimationEnd(animation);
            isMorphingToShow = false;
            isShowing = false;
            overlayView.setAlpha(0.0f);
            overlayView.setVisibility(View.INVISIBLE);
        }
    });
    morphAnimator.start();
    previewView.setVisibility(View.VISIBLE);
    overlayView.setVisibility(View.VISIBLE);
    morphView.setVisibility(View.INVISIBLE);
    overlayView.animate()
            .alpha(0f)
            .setDuration(morphShowDuration / 2);

}
 

private void startReverseCircularReveal(final FrameLayout previewView,
                                        final PreviewBar previewBar,
                                        final View overlayView,
                                        final View morphView) {
    isMorphingToHide = true;

    float startRadius = getRadius(previewView);
    float endRadius = previewView.getHeight() / 2f;
    long duration = morphHideDuration;

    morphAnimator = ViewAnimationUtils.createCircularReveal(previewView,
            getCenterX(previewView),
            getCenterY(previewView),
            startRadius,
            endRadius);
    morphAnimator.setDuration(duration);
    morphAnimator.setInterpolator(new AccelerateInterpolator());
    morphAnimator.setTarget(previewView);
    morphAnimator.addListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            super.onAnimationEnd(animation);
            isMorphingToHide = false;
            startHideTranslation(previewView, previewBar, overlayView, morphView);
        }
    });
    overlayView.setVisibility(View.VISIBLE);
    overlayView.animate().alpha(1f).setDuration(morphHideDuration / 2)
            .setInterpolator(new AccelerateInterpolator()).start();
    morphAnimator.start();
}
 

@Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup fcontainer, @Nullable Bundle savedInstanceState) {

        if (savedInstanceState == null) {
            getChildFragmentManager().beginTransaction()
                    .add(new MediaPickerFragment(), "picker")
                    .commitNow();
        }

        root = new FrameLayout(getContext()) {
            @Override
            protected void onSizeChanged(int w, int h, int oldw, int oldh) {
                super.onSizeChanged(w, h, oldw, oldh);
                if (h != oldh && shareButtons != null) {
                    shareButtons.getLayoutParams().height = root.getHeight() - Screen.dp(135);
                    shareButtons.requestLayout();
                }
            }
        };
        root.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.MATCH_PARENT));
        root.setBackgroundColor(getActivity().getResources().getColor(R.color.dialog_overlay));
        root.setVisibility(View.INVISIBLE);

        isLoaded = false;
//        messenger().getGalleryScannerActor().send(new GalleryScannerActor.Show());
//        messenger().getGalleryScannerActor().send(new GalleryScannerActor.Hide());

        return root;
    }
 

public static final CurtainViewController.SlidingStatus getSlidingStatus(
        CurtainViewController mCurtainViewController) {

    FrameLayout slidingParent = mCurtainViewController.getSlidingParent();
    FrameLayout.LayoutParams slidingLayoutParams = (FrameLayout.LayoutParams) slidingParent
            .getLayoutParams();

    if (mCurtainViewController.getSlidingItem().getSlidingType() == SlidingType.SIZE) {

        int currentSlidingHeight = slidingParent.getHeight();

        if (currentSlidingHeight == 0) {
            return CurtainViewController.SlidingStatus.COLLAPSED;

        } else if (currentSlidingHeight >= mCurtainViewController
                .getSlidingHeight()) {
            return CurtainViewController.SlidingStatus.EXPANDED;

        } else {
            return CurtainViewController.SlidingStatus.ANIMATING;
        }

    } else if (mCurtainViewController.getSlidingItem().getSlidingType() == SlidingType.MOVE) {

        int currentSlidingTop = slidingLayoutParams.topMargin;

        if (currentSlidingTop <= -mCurtainViewController.getSlidingHeight()) {
            return CurtainViewController.SlidingStatus.COLLAPSED;

        } else if (currentSlidingTop >= 0) {
            return CurtainViewController.SlidingStatus.EXPANDED;

        } else {
            return CurtainViewController.SlidingStatus.ANIMATING;
        }

    } else {
        return CurtainViewController.SlidingStatus.ANIMATING;
    }
}
 

private float getMorphScale(FrameLayout previewView, View morphView) {
    return (float) (previewView.getHeight() / morphView.getLayoutParams().height);
}
 

/**
 * The destination Y of the view that'll morph into the preview
 */
private float getMorphEndY(FrameLayout previewView, View morphView) {
    return (int) (previewView.getY()
            + previewView.getHeight() / 2f)
            - morphView.getHeight() / 2f;
}