yuriyskulskiy

...
    private Bitmap mBitmap;
    ...
    private void initScrollView() {
        ...
        Resources res = getResources();
        mBitmap = BitmapFactory.decodeResource(res, R.drawable.hand_rope);
        mBitmap = Bitmap.createScaledBitmap(mBitmap, mBitmap.getWidth() / 2,
                                            mBitmap.getHeight() / 2, false);
    }

yuriyskulskiy

...
    <com.example.replica.NestedScrollView
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:background="@color/overscroll_background">

        <androidx.cardview.widget.CardView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:elevation="8dp"

yuriyskulskiy

private boolean useEdgeEffect = false;
...

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
      
                    ...
//                  if (canOverscroll) {
                    if (useEdgeEffect) {
                        deltaY -= mScrollConsumed[1];

yuriyskulskiy

boolean overScrollByCompat(int deltaX, int deltaY,
                               int scrollX, int scrollY,
                               int scrollRangeX, int scrollRangeY,
                               int maxOverScrollX, int maxOverScrollY,
                               boolean isTouchEvent) {
        ...
//      if (clampedY && !hasNestedScrollingParent(ViewCompat.TYPE_NON_TOUCH)) {
        if (clampedY && !hasNestedScrollingParent(ViewCompat.TYPE_NON_TOUCH)
                && !mIsBeingDragged) {
            mScroller.springBack(newScrollX, newScrollY, 0, 0, 0, getScrollRange());

yuriyskulskiy

    public void fling(int velocityY) {
        if (getChildCount() > 0) {
//          standart implementation:
//             mScroller.fling(getScrollX(), getScrollY(), // start
//                     0, velocityY, // velocities
//                     0, 0, // x
//                     Integer.MIN_VALUE, Integer.MAX_VALUE, // y
//                     0, 0); // overscroll
//            fixed implementation:
            int height = getHeight() - getPaddingBottom() - getPaddingTop();

yuriyskulskiy

@Override
    public void computeScroll() {
            ...
            overScrollByCompat(0, unconsumed, getScrollX(), 
                    oldScrollY, 0, range, 0, mOverflingDistance, false);
            ...          
    }

yuriyskulskiy

   @Override
    public boolean onTouchEvent(MotionEvent ev) {
            ...
            case MotionEvent.ACTION_MOVE:
                ...
               
                    // Calling overScrollByCompat will call onOverScrolled, which
                    // calls onScrollChanged if applicable.
                    if (overScrollByCompat(0, deltaY, 0, getScrollY(), 0, range, 0,
                            mOverscrollDistance, true) && !hasNestedScrollingParent(ViewCompat.TYPE_TOUCH)) {

yuriyskulskiy

public class NestedScrollView extends FrameLayout implements NestedScrollingParent3,
        NestedScrollingChild3, ScrollingView {
    static final int ANIMATED_SCROLL_GAP = 250;

    static final float MAX_SCROLL_FACTOR = 0.5f;

    private static final String TAG = "NestedScrollView";

    /**
     * Interface definition for a callback to be invoked when the scroll

yuriyskulskiy

public class ExpandableTextView extends AppCompatTextView
        implements View.OnClickListener {

    private final int COLLAPSED_MAX_LINES = 3;
    private final static String POSTFIX = "...see more ";

    private ValueAnimator mAnimator;
    private boolean isCollapsing;
    private CharSequence mOriginalText;

yuriyskulskiy

   @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        if (getLineCount() <= COLLAPSED_MAX_LINES) {
            deEllipsize();  // add to fix current bug
            setClickable(false);
        } else {
            setClickable(true);
            if (!animator.isRunning() && isCollapsed()) {
                ellipsizeColored();