Example usage for android.support.v4.widget NestedScrollView getHeight

Introduction

In this page you can find the example usage for android.support.v4.widget NestedScrollView getHeight.

Prototype

@ViewDebug.ExportedProperty(category = "layout")
public final int getHeight() 

Source Link

Document

Return the height of your view.

Usage

From source file:com.android.argb.edhlc.Utils.java

public static void makeViewVisible(View view) {
    int viewTop = view.getTop();
    int viewBottom = view.getBottom();

    for (;;) {/*from ww w. j  a va  2 s  . c o  m*/
        ViewParent viewParent = view.getParent();
        if (viewParent == null || !(viewParent instanceof ViewGroup))
            break;

        ViewGroup viewGroupParent = (ViewGroup) viewParent;
        if (viewGroupParent instanceof NestedScrollView) {

            NestedScrollView nestedScrollView = (NestedScrollView) viewGroupParent;
            int height = nestedScrollView.getHeight();
            int screenTop = nestedScrollView.getScrollY();
            int screenBottom = screenTop + height;
            int fadingEdge = nestedScrollView.getVerticalFadingEdgeLength();

            // leave room for top fading edge as long as rect isn't at very top
            if (viewTop > 0)
                screenTop += fadingEdge;

            // leave room for bottom fading edge as long as rect isn't at very bottom
            if (viewBottom < nestedScrollView.getChildAt(0).getHeight())
                screenBottom -= fadingEdge;

            int scrollYDelta = 0;

            if (viewBottom > screenBottom && viewTop > screenTop) {
                // need to move down to get it in view: move down just enough so
                // that the entire rectangle is in view (or at least the first
                // screen size chunk).

                if (viewBottom - viewTop > height) // just enough to get screen size chunk on
                    scrollYDelta += (viewTop - screenTop);
                else // get entire rect at bottom of screen
                    scrollYDelta += (viewBottom - screenBottom);

                // make sure we aren't scrolling beyond the end of our content
                int bottom = nestedScrollView.getChildAt(0).getBottom();
                int distanceToBottom = bottom - screenBottom;
                scrollYDelta = Math.min(scrollYDelta, distanceToBottom);

            } else if (viewTop < screenTop && viewBottom < screenBottom) {
                // need to move up to get it in view: move up just enough so that
                // entire rectangle is in view (or at least the first screen
                // size chunk of it).

                if (viewBottom - viewTop > height) // screen size chunk
                    scrollYDelta -= (screenBottom - viewBottom);
                else // entire rect at top
                    scrollYDelta -= (screenTop - viewTop);

                // make sure we aren't scrolling any further than the top our content
                scrollYDelta = Math.max(scrollYDelta, -nestedScrollView.getScrollY());
            }
            nestedScrollView.smoothScrollBy(0, scrollYDelta);
            break;
        }
        // Transform coordinates to parent:
        int dy = viewGroupParent.getTop() - viewGroupParent.getScrollY();
        viewTop += dy;
        viewBottom += dy;

        view = viewGroupParent;
    }
}

---