Example usage for android.view ViewGroup getViewTreeObserver

List of usage examples for android.view ViewGroup getViewTreeObserver

Introduction

In this page you can find the example usage for android.view ViewGroup getViewTreeObserver.

Prototype

public ViewTreeObserver getViewTreeObserver() 

Source Link

Document

Returns the ViewTreeObserver for this view's hierarchy.

Usage

From source file:android.support.v17.leanback.app.OnboardingSupportFragment.java

@Nullable
@Override/*from w  w w  .j a v  a  2  s.co  m*/
public View onCreateView(LayoutInflater inflater, final ViewGroup container, Bundle savedInstanceState) {
    resolveTheme();
    LayoutInflater localInflater = getThemeInflater(inflater);
    final ViewGroup view = (ViewGroup) localInflater.inflate(R.layout.lb_onboarding_fragment, container, false);
    mIsLtr = getResources().getConfiguration().getLayoutDirection() == View.LAYOUT_DIRECTION_LTR;
    mPageIndicator = (PagingIndicator) view.findViewById(R.id.page_indicator);
    mPageIndicator.setOnClickListener(mOnClickListener);
    mPageIndicator.setOnKeyListener(mOnKeyListener);
    mStartButton = view.findViewById(R.id.button_start);
    mStartButton.setOnClickListener(mOnClickListener);
    mStartButton.setOnKeyListener(mOnKeyListener);
    mLogoView = (ImageView) view.findViewById(R.id.logo);
    mTitleView = (TextView) view.findViewById(R.id.title);
    mDescriptionView = (TextView) view.findViewById(R.id.description);
    if (sSlideDistance == 0) {
        sSlideDistance = (int) (SLIDE_DISTANCE
                * getActivity().getResources().getDisplayMetrics().scaledDensity);
    }
    if (savedInstanceState == null) {
        mCurrentPageIndex = 0;
        mEnterTransitionFinished = false;
        mPageIndicator.onPageSelected(0, false);
        view.getViewTreeObserver().addOnPreDrawListener(new OnPreDrawListener() {
            @Override
            public boolean onPreDraw() {
                view.getViewTreeObserver().removeOnPreDrawListener(this);
                if (!startLogoAnimation()) {
                    startEnterAnimation();
                }
                return true;
            }
        });
    } else {
        mEnterTransitionFinished = true;
        mCurrentPageIndex = savedInstanceState.getInt(KEY_CURRENT_PAGE_INDEX);
        initializeViews(view);
    }
    view.requestFocus();
    return view;
}

From source file:com.android.tv.settings.dialog.old.BaseDialogFragment.java

public void performEntryTransition(final Activity activity, final ViewGroup contentView, int iconResourceId,
        Uri iconResourceUri, final ImageView icon, final TextView title, final TextView description,
        final TextView breadcrumb) {
    // Pull out the root layout of the dialog and set the background drawable, to be
    // faded in during the transition.
    final ViewGroup twoPane = (ViewGroup) contentView.getChildAt(0);
    twoPane.setVisibility(View.INVISIBLE);

    // If the appropriate data is embedded in the intent and there is an icon specified
    // in the content fragment, we animate the icon from its initial position to the final
    // position. Otherwise, we perform a simpler transition in which the ActionFragment
    // slides in and the ContentFragment text fields slide in.
    mIntroAnimationInProgress = true;//from  ww w. j a  va2s.  c  o  m
    List<TransitionImage> images = TransitionImage.readMultipleFromIntent(activity, activity.getIntent());
    TransitionImageAnimation ltransitionAnimation = null;
    final Uri iconUri;
    final int color;
    if (images != null && images.size() > 0) {
        if (iconResourceId != 0) {
            iconUri = Uri.parse(UriUtils.getAndroidResourceUri(activity, iconResourceId));
        } else if (iconResourceUri != null) {
            iconUri = iconResourceUri;
        } else {
            iconUri = null;
        }
        TransitionImage src = images.get(0);
        color = src.getBackground();
        if (iconUri != null) {
            ltransitionAnimation = new TransitionImageAnimation(contentView);
            ltransitionAnimation.addTransitionSource(src);
            ltransitionAnimation.transitionDurationMs(ANIMATE_IN_DURATION).transitionStartDelayMs(0)
                    .interpolator(new DecelerateInterpolator(1f));
        }
    } else {
        iconUri = null;
        color = 0;
    }
    final TransitionImageAnimation transitionAnimation = ltransitionAnimation;

    // Fade out the old activity, and hard cut the new activity.
    activity.overridePendingTransition(R.anim.hard_cut_in, R.anim.fade_out);

    int bgColor = mFragment.getResources().getColor(R.color.dialog_activity_background);
    mBgDrawable.setColor(bgColor);
    mBgDrawable.setAlpha(0);
    twoPane.setBackground(mBgDrawable);

    // If we're animating the icon, we create a new ImageView in which to place the embedded
    // bitmap. We place it in the root layout to match its location in the previous activity.
    mShadowLayer = (FrameLayoutWithShadows) twoPane.findViewById(R.id.shadow_layout);
    if (transitionAnimation != null) {
        transitionAnimation.listener(new TransitionImageAnimation.Listener() {
            @Override
            public void onRemovedView(TransitionImage src, TransitionImage dst) {
                if (icon != null) {
                    //want to make sure that users still see at least the source image
                    // if the dst image is too large to finish downloading before the
                    // animation is done. Check if the icon is not visible. This mean
                    // BaseContentFragement have not finish downloading the image yet.
                    if (icon.getVisibility() != View.VISIBLE) {
                        icon.setImageDrawable(src.getBitmap());
                        int intrinsicWidth = icon.getDrawable().getIntrinsicWidth();
                        LayoutParams lp = icon.getLayoutParams();
                        lp.height = lp.width * icon.getDrawable().getIntrinsicHeight() / intrinsicWidth;
                        icon.setVisibility(View.VISIBLE);
                    }
                    icon.setAlpha(1f);
                }
                if (mShadowLayer != null) {
                    mShadowLayer.setShadowsAlpha(1f);
                }
                onIntroAnimationFinished();
            }
        });
        icon.setAlpha(0f);
        if (mShadowLayer != null) {
            mShadowLayer.setShadowsAlpha(0f);
        }
    }

    // We need to defer the remainder of the animation preparation until the first
    // layout has occurred, as we don't yet know the final location of the icon.
    twoPane.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            twoPane.getViewTreeObserver().removeOnGlobalLayoutListener(this);
            // if we buildLayer() at this time,  the texture is actually not created
            // delay a little so we can make sure all hardware layer is created before
            // animation, in that way we can avoid the jittering of start animation
            twoPane.postOnAnimationDelayed(mEntryAnimationRunnable, ANIMATE_DELAY);
        }

        final Runnable mEntryAnimationRunnable = new Runnable() {
            @Override
            public void run() {
                if (!mFragment.isAdded()) {
                    // We have been detached before this could run, so just bail
                    return;
                }

                twoPane.setVisibility(View.VISIBLE);
                final int secondaryDelay = SLIDE_IN_DISTANCE;

                // Fade in the activity background protection
                ObjectAnimator oa = ObjectAnimator.ofInt(mBgDrawable, "alpha", 255);
                oa.setDuration(ANIMATE_IN_DURATION);
                oa.setStartDelay(secondaryDelay);
                oa.setInterpolator(new DecelerateInterpolator(1.0f));
                oa.start();

                View actionFragmentView = activity.findViewById(mActionAreaId);
                boolean isRtl = ViewCompat.getLayoutDirection(contentView) == ViewCompat.LAYOUT_DIRECTION_RTL;
                int startDist = isRtl ? SLIDE_IN_DISTANCE : -SLIDE_IN_DISTANCE;
                int endDist = isRtl ? -actionFragmentView.getMeasuredWidth()
                        : actionFragmentView.getMeasuredWidth();

                // Fade in and slide in the ContentFragment TextViews from the start.
                prepareAndAnimateView(title, 0, startDist, secondaryDelay, ANIMATE_IN_DURATION,
                        new DecelerateInterpolator(1.0f), false);
                prepareAndAnimateView(breadcrumb, 0, startDist, secondaryDelay, ANIMATE_IN_DURATION,
                        new DecelerateInterpolator(1.0f), false);
                prepareAndAnimateView(description, 0, startDist, secondaryDelay, ANIMATE_IN_DURATION,
                        new DecelerateInterpolator(1.0f), false);

                // Fade in and slide in the ActionFragment from the end.
                prepareAndAnimateView(actionFragmentView, 0, endDist, secondaryDelay, ANIMATE_IN_DURATION,
                        new DecelerateInterpolator(1.0f), false);

                if (icon != null && transitionAnimation != null) {
                    // now we get the icon view in place,  update the transition target
                    TransitionImage target = new TransitionImage();
                    target.setUri(iconUri);
                    target.createFromImageView(icon);
                    if (icon.getBackground() instanceof ColorDrawable) {
                        ColorDrawable d = (ColorDrawable) icon.getBackground();
                        target.setBackground(d.getColor());
                    }
                    transitionAnimation.addTransitionTarget(target);
                    transitionAnimation.startTransition();
                } else if (icon != null) {
                    prepareAndAnimateView(icon, 0, startDist, secondaryDelay, ANIMATE_IN_DURATION,
                            new DecelerateInterpolator(1.0f), true /* is the icon */);
                    if (mShadowLayer != null) {
                        mShadowLayer.setShadowsAlpha(0f);
                    }
                }
            }
        };
    });
}