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

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.harry.refresh.SwipyRefreshLayout.java

public boolean canChildScrollDown() {
    if (android.os.Build.VERSION.SDK_INT < 14) {
        if (mTarget instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) mTarget;
            try {
                if (absListView.getCount() > 0) {
                    if (absListView.getLastVisiblePosition() + 1 == absListView.getCount()) {
                        int lastIndex = absListView.getLastVisiblePosition() - absListView.getFirstVisiblePosition();
                        return absListView.getChildAt(lastIndex).getBottom() == absListView.getPaddingBottom();
                    }//  w ww .ja  v  a2  s  .  c  o  m
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return true;
        } else {
            return true;
        }
    } else {
        return ViewCompat.canScrollVertically(mTarget, 1);
    }
}

From source file:com.taobao.weex.ui.view.refresh.core.WXSwipeLayout.java

/**
 * Whether child view can scroll up/*w  w w .ja  va2  s .co m*/
 * @return
 */
public boolean canChildScrollUp() {
    if (mTargetView == null) {
        return false;
    }
    if (Build.VERSION.SDK_INT < 14) {
        if (mTargetView instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) mTargetView;
            return absListView.getChildCount() > 0 && (absListView.getFirstVisiblePosition() > 0
                    || absListView.getChildAt(0).getTop() < absListView.getPaddingTop());
        } else {
            return ViewCompat.canScrollVertically(mTargetView, -1) || mTargetView.getScrollY() > 0;
        }
    } else {
        return ViewCompat.canScrollVertically(mTargetView, -1);
    }
}

From source file:com.canyinghao.canrefresh.CanRefreshLayout.java

/**
 * ?/*from   w w w.  j  a  v a2  s. c om*/
 *
 * @return
 */
protected boolean canChildScrollDown() {
    if (android.os.Build.VERSION.SDK_INT < 14) {
        if (mContentView instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) mContentView;
            return absListView.getChildCount() > 0
                    && (absListView.getLastVisiblePosition() < absListView.getChildCount() - 1
                            || absListView.getChildAt(absListView.getChildCount() - 1).getBottom() > absListView
                                    .getPaddingBottom());
        } else {
            return ViewCompat.canScrollVertically(mContentView, 1) || mContentView.getScrollY() < 0;
        }
    } else {
        return ViewCompat.canScrollVertically(mContentView, 1);
    }
}

From source file:com.taobao.weex.ui.view.refresh.core.WXSwipeLayout.java

/**
 * Whether child view can scroll down//w  ww.  j a va  2  s .com
 * @return
 */
public boolean canChildScrollDown() {
    if (mTargetView == null) {
        return false;
    }
    if (Build.VERSION.SDK_INT < 14) {
        if (mTargetView instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) mTargetView;
            if (absListView.getChildCount() > 0) {
                int lastChildBottom = absListView.getChildAt(absListView.getChildCount() - 1).getBottom();
                return absListView.getLastVisiblePosition() == absListView.getAdapter().getCount() - 1
                        && lastChildBottom <= absListView.getMeasuredHeight();
            } else {
                return false;
            }

        } else {
            return ViewCompat.canScrollVertically(mTargetView, 1) || mTargetView.getScrollY() > 0;
        }
    } else {
        return ViewCompat.canScrollVertically(mTargetView, 1);
    }
}

From source file:org.alex.refreshlayout.RefreshLayout.java

/**
 * SwipeRefreshLayout ????/*from w w  w. jav a2 s .  co m*/
 *  RecyclerView.canScrollVertically(-1);  //true??false?
 *
 * @return true  ? ? 
 */
public boolean canChildScrollUp() {
    if (childScrollUpCallback != null) {
        return childScrollUpCallback.canChildScrollUp(this, targetView);
    }
    if (android.os.Build.VERSION.SDK_INT < 14) {
        if (targetView instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) targetView;
            return absListView.getChildCount() > 0 && (absListView.getFirstVisiblePosition() > 0
                    || absListView.getChildAt(0).getTop() < absListView.getPaddingTop());
        } else {
            return ViewCompat.canScrollVertically(targetView, -1) || targetView.getScrollY() > 0;
        }
    } else {
        return ViewCompat.canScrollVertically(targetView, -1);
    }
}

From source file:com.wunderlist.slidinglayer.SlidingLayer.java

protected boolean canScroll(View v, boolean checkV, int dx, int dy, int x, int y) {

    if (v instanceof ViewGroup) {
        final ViewGroup group = (ViewGroup) v;
        final int scrollX = v.getScrollX();
        final int scrollY = v.getScrollY();

        final int count = group.getChildCount();
        // Count backwards - let topmost views consume scroll distance first.
        for (int i = count - 1; i >= 0; i--) {
            // TODO: Add versioned support here for transformed views.
            // This will not work for transformed views in Honeycomb+
            final View child = group.getChildAt(i);
            if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight()
                    && y + scrollY >= child.getTop() && y + scrollY < child.getBottom() && canScroll(child,
                            true, dx, dy, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }/*from   ww w. j  av a 2 s .c o  m*/
        }
    }

    return checkV && ((allowedDirection() == HORIZONTAL && ViewCompat.canScrollHorizontally(v, -dx)
            || allowedDirection() == VERTICAL && ViewCompat.canScrollVertically(v, -dy)));
}

From source file:com.gu.swiperefresh.SwipeRefreshPlush.java

/**
 * targrt view ??/*  w  w  w .  j a va2s  .com*/
 *
 * @return target view ??
 */
private boolean canChildScrollUp() {
    if (android.os.Build.VERSION.SDK_INT < 14) {
        if (mTarget instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) mTarget;
            return absListView.getChildCount() > 0 && (absListView.getFirstVisiblePosition() > 0
                    || absListView.getChildAt(0).getTop() < absListView.getPaddingTop());
        } else {
            return ViewCompat.canScrollVertically(mTarget, -1) || mTarget.getScrollY() > 0;
        }
    } else {
        return mTarget.canScrollVertically(-1);
    }
}

From source file:org.alex.refreshlayout.RefreshLayout.java

/**
 * SwipeRefreshLayout ?? ?//w w  w.  j a  va2 s . com
 *  RecyclerView.canScrollVertically(1);  //true??false?
 */
public boolean canChildScrollDown() {
    if (childScrollDownCallback != null) {
        return childScrollDownCallback.canChildScrollDown(this, targetView);
    }
    if (android.os.Build.VERSION.SDK_INT < 14) {
        if (targetView instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) targetView;
            if (absListView.getChildCount() > 0) {
                int lastChildBottom = absListView.getChildAt(absListView.getChildCount() - 1).getBottom();
                return absListView.getLastVisiblePosition() == absListView.getAdapter().getCount() - 1
                        && lastChildBottom <= absListView.getMeasuredHeight();
            } else {
                return false;
            }

        } else {
            return ViewCompat.canScrollVertically(targetView, 1) || targetView.getScrollY() > 0;
        }
    } else {
        return ViewCompat.canScrollVertically(targetView, 1);
    }
}

From source file:com.gu.swiperefresh.SwipeRefreshPlush.java

/**
 * target view ??/*www .  j  av a 2s.  c o m*/
 *
 * @return
 */
private boolean canChildScrollDown() {
    if (android.os.Build.VERSION.SDK_INT < 14) {
        if (mTarget instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) mTarget;
            int count = absListView.getChildCount();
            //return absListView.canScrollList(-1);
            int position = absListView.getLastVisiblePosition();
            return (count > position + 1)
                    || absListView.getChildAt(position).getBottom() <= absListView.getPaddingBottom();
        } else {
            return ViewCompat.canScrollVertically(mTarget, 1);
        }
    } else {
        return mTarget.canScrollVertically(1);
    }
}

From source file:com.usabusi.swiperefreshlayoutupdown.view.SwipeRefreshLayoutUpDown.java

public boolean canChildScrollDown() {
    if (android.os.Build.VERSION.SDK_INT < 14) {
        if (mTarget instanceof AbsListView) {
            final AbsListView absListView = (AbsListView) mTarget;
            View lastChild = absListView.getChildAt(absListView.getChildCount() - 1);
            if (lastChild != null) {
                return (absListView.getLastVisiblePosition() == (absListView.getCount() - 1))
                        && lastChild.getBottom() > absListView.getPaddingBottom();
            } else {
                return false;
            }/*from w  w w  . j  ava 2  s.  c  om*/
        } else {
            //return mTarget.getHeight() - mTarget.getScrollY() > 0;
            return mTarget.getScrollY() < 0;
        }
    } else {
        return ViewCompat.canScrollVertically(mTarget, 1);
    }
}