Example usage for android.support.v4.view ViewCompat canScrollVertically

List of usage examples for android.support.v4.view ViewCompat canScrollVertically

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Introduction

In this page you can find the example usage for android.support.v4.view ViewCompat canScrollVertically.

Prototype

public static boolean canScrollVertically(View v, int direction)

Source Link

Document

Check if this view can be scrolled vertically in a certain direction.

Usage

From source file:com.lanma.customviewproject.utils.ScrollingUtil.java

/**
 * RecyclerView?//from ww w  .  j a  v a 2s  . c o m
 */
public static boolean isRecyclerViewToBottom(RecyclerView recyclerView) {
    if (recyclerView != null) {
        RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
        if (manager == null || manager.getItemCount() == 0) {
            return false;
        }

        if (manager instanceof LinearLayoutManager) {
            // ?item?
            View lastVisibleChild = recyclerView.getChildAt(recyclerView.getChildCount() - 1);
            if (lastVisibleChild != null
                    && lastVisibleChild.getMeasuredHeight() >= recyclerView.getMeasuredHeight()) {
                if (Build.VERSION.SDK_INT < 14) {
                    return !(ViewCompat.canScrollVertically(recyclerView, 1) || recyclerView.getScrollY() < 0);
                } else {
                    return !ViewCompat.canScrollVertically(recyclerView, 1);
                }
            }

            LinearLayoutManager layoutManager = (LinearLayoutManager) manager;
            if (layoutManager.findLastCompletelyVisibleItemPosition() == layoutManager.getItemCount() - 1) {
                return true;
            }
        } else if (manager instanceof StaggeredGridLayoutManager) {
            StaggeredGridLayoutManager layoutManager = (StaggeredGridLayoutManager) manager;

            int[] out = layoutManager.findLastCompletelyVisibleItemPositions(null);
            int lastPosition = layoutManager.getItemCount() - 1;
            for (int position : out) {
                if (position == lastPosition) {
                    return true;
                }
            }
        }
    }
    return false;
}

From source file:cn.liuguangqiang.swipeback.SwipeBackLayout.java

public boolean canChildScrollUp() {
    return ViewCompat.canScrollVertically(scrollChild, -1);
}

From source file:cn.liuguangqiang.swipeback.SwipeBackLayout.java

public boolean canChildScrollDown() {
    return ViewCompat.canScrollVertically(scrollChild, 1);
}

From source file:xyz.hanks.nestedwebview.SSScrollView.java

@Override
public boolean dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed,
        int[] offsetInWindow) {
    Log.e("......", "........." + ViewCompat.canScrollVertically(getChildAt(0), -1));
    Log.e("......",
            ".........webview" + ViewCompat.canScrollVertically(((ViewGroup) getChildAt(0)).getChildAt(0), -1));
    return mChildHelper.dispatchNestedScroll(dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed,
            offsetInWindow);// www .  ja va  2  s  .  co  m
}

From source file:com.ouyangzn.view.DragLayout.java

private boolean isVerticalScrollView(View view) {
    if (view instanceof RecyclerView) {
        RecyclerView recyclerView = (RecyclerView) view;
        RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
        if (layoutManager instanceof LinearLayoutManager) {
            LinearLayoutManager manager = (LinearLayoutManager) layoutManager;
            if (manager.getOrientation() == LinearLayoutManager.VERTICAL) {
                return true;
            }//from ww w .  j av  a  2s . co m
        }
    }
    return view instanceof ScrollView || ViewCompat.canScrollVertically(view, -1)
            || ViewCompat.canScrollVertically(view, 1);
}

From source file:com.google.android.apps.common.testing.accessibility.framework.uielement.ViewHierarchyElement.java

ViewHierarchyElement(int id, @Nullable ViewHierarchyElement parent, View fromView) {
    // Bookkeeping
    this.id = id;
    this.parentId = (parent != null) ? parent.getId() : null;

    // API 16+ properties
    this.scrollable = AT_16 ? fromView.isScrollContainer() : null;

    // API 11+ properties
    this.backgroundDrawableColor = (AT_11 && (fromView != null)
            && (fromView.getBackground() instanceof ColorDrawable))
                    ? ((ColorDrawable) fromView.getBackground()).getColor()
                    : null;// w  w  w.j  av  a  2s. c o m

    // Base properties
    this.visibleToUser = ViewAccessibilityUtils.isVisibleToUser(fromView);
    this.className = fromView.getClass().getName();
    this.accessibilityClassName = null;
    this.packageName = fromView.getContext().getPackageName();
    this.resourceName = (fromView.getId() != View.NO_ID)
            ? ViewAccessibilityUtils.getResourceNameForView(fromView)
            : null;
    this.contentDescription = SpannableString.valueOf(fromView.getContentDescription());
    this.enabled = fromView.isEnabled();
    if (fromView instanceof TextView) {
        TextView textView = (TextView) fromView;
        // Hint text takes precedence if no text is present.
        CharSequence text = textView.getText();
        if (TextUtils.isEmpty(text)) {
            text = textView.getHint();
        }
        this.text = SpannableString.valueOf(text);
        this.textSize = textView.getTextSize();
        this.textColor = textView.getCurrentTextColor();
        this.typefaceStyle = (textView.getTypeface() != null) ? textView.getTypeface().getStyle() : null;
    } else {
        this.text = null;
        this.textSize = null;
        this.textColor = null;
        this.typefaceStyle = null;
    }

    this.importantForAccessibility = ViewAccessibilityUtils.isImportantForAccessibility(fromView);
    this.clickable = fromView.isClickable();
    this.longClickable = fromView.isLongClickable();
    this.focusable = fromView.isFocusable();
    this.editable = ViewAccessibilityUtils.isViewEditable(fromView);
    this.canScrollForward = (ViewCompat.canScrollVertically(fromView, 1)
            || ViewCompat.canScrollHorizontally(fromView, 1));
    this.canScrollBackward = (ViewCompat.canScrollVertically(fromView, -1)
            || ViewCompat.canScrollHorizontally(fromView, -1));
    this.checkable = (fromView instanceof Checkable);
    this.checked = (fromView instanceof Checkable) ? ((Checkable) fromView).isChecked() : null;
    this.hasTouchDelegate = (fromView.getTouchDelegate() != null);

    // There may be subtle differences between the bounds from a View instance compared to that of
    // its AccessibilityNodeInfo. The latter uses a @hide getBoundsOnScreen method, which clips to
    // parent bounds.
    android.graphics.Rect tempRect = new android.graphics.Rect();
    if (fromView.getGlobalVisibleRect(tempRect)) {
        this.boundsInScreen = new Rect(tempRect);
    } else {
        this.boundsInScreen = null;
    }
    this.nonclippedHeight = fromView.getHeight();
    this.nonclippedWidth = fromView.getWidth();
}

From source file:com.google.android.apps.santatracker.map.BottomSheetBehavior.java

@Override
public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, int dy,
        int[] consumed) {
    int currentTop = child.getTop();
    int newTop = currentTop - dy;
    if (dy > 0) { // Upward
        if (newTop < mMinOffset) {
            consumed[1] = currentTop - mMinOffset;
            child.offsetTopAndBottom(-consumed[1]);
            if (NEEDS_INVALIDATING && mState != STATE_EXPANDED) {
                child.invalidate();//w ww. jav a 2s .  c om
            }
            setStateInternal(STATE_EXPANDED);
        } else {
            consumed[1] = dy;
            child.offsetTopAndBottom(-dy);
            setStateInternal(STATE_DRAGGING);
            if (NEEDS_INVALIDATING) {
                child.invalidate();
            }
        }
    } else if (dy < 0) { // Downward
        if (!ViewCompat.canScrollVertically(target, -1)) {
            if (newTop <= mMaxOffset) {
                consumed[1] = dy;
                child.offsetTopAndBottom(-dy);
                setStateInternal(STATE_DRAGGING);
                if (NEEDS_INVALIDATING) {
                    coordinatorLayout.invalidate(child.getLeft(), currentTop, child.getRight(),
                            coordinatorLayout.getHeight());
                }
            } else if (mHideable) {
                if (newTop <= mParentHeight - mHiddenPeekHeight) {
                    consumed[1] = dy;
                    child.offsetTopAndBottom(-dy);
                    setStateInternal(STATE_DRAGGING);
                } else {
                    consumed[1] = currentTop - (mParentHeight - mHiddenPeekHeight);
                    child.offsetTopAndBottom(-consumed[1]);
                    setStateInternal(STATE_HIDDEN);
                }
                if (NEEDS_INVALIDATING) {
                    coordinatorLayout.invalidate(child.getLeft(), currentTop, child.getRight(),
                            coordinatorLayout.getHeight());
                }
            } else {
                consumed[1] = currentTop - mMaxOffset;
                child.offsetTopAndBottom(-consumed[1]);
                setStateInternal(STATE_COLLAPSED);
            }
        }
    }
    dispatchOnSlide(child.getTop());
    mLastNestedScrollDy = dy;
}

From source file:ca.zadrox.dota2esportticker.ui.MatchActivity.java

/**
 * This method overrides the default behaviour of the swipe refresh layout, letting the
 * list in the listfragment scroll first
 *//*w w w  . j  a va2  s .  c om*/
@Override
public boolean canSwipeRefreshChildScrollUp() {

    for (MatchListFragment fragment : mMatchListFragments) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
            if (!fragment.getUserVisibleHint()) {
                continue;
            }
        }
        return ViewCompat.canScrollVertically(fragment.getListView(), -1);
    }

    return false;
}

From source file:org.faudroids.boredrudolf.ui.CustomSwipeRefreshLayout.java

/**
 * @return Whether it is possible for the child view of this layout to
 * scroll up. Override this if the child view is a custom view.
 *///from  w w  w  .j a  v a2s  . com
private boolean canViewScrollUp(View view, MotionEvent event) {
    boolean ret;

    event.offsetLocation(view.getScrollX() - view.getLeft(), view.getScrollY() - view.getTop());
    if (mScrollUpHandler != null) {
        boolean canViewScrollUp = mScrollUpHandler.canScrollUp(view);
        if (canViewScrollUp)
            return true;
    }

    if (android.os.Build.VERSION.SDK_INT < 14) {
        if (view instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) view;
            ret = absListView.getChildCount() > 0 && (absListView.getFirstVisiblePosition() > 0
                    || absListView.getChildAt(0).getTop() < absListView.getPaddingTop());
        } else {
            ret = view.getScrollY() > 0 || canChildrenScrollUp(view, event);
        }
    } else {
        ret = ViewCompat.canScrollVertically(view, -1) || canChildrenScrollUp(view, event);
    }
    if (DEBUG)
        Log.d(TAG, "canViewScrollUp " + view.getClass().getName() + " " + ret);
    return ret;
}

From source file:pl.edu.agh.schedule.myschedule.MyScheduleActivity.java

@Override
public boolean canSwipeRefreshChildScrollUp() {
    for (MyScheduleFragment fragment : mMyScheduleFragments) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
            if (!fragment.getUserVisibleHint()) {
                continue;
            }/*from w w  w  . j ava2s .c  o m*/
        }
        return ViewCompat.canScrollVertically(fragment.getListView(), -1);
    }
    return false;
}