// Returns the distance that over the scroll limit.
public int startScroll(int distance, int min, int max) {
int currPosition = mScroller.getCurrX();
int finalPosition = mScroller.isFinished() ? currPosition : mScroller.getFinalX();
int newPosition = Utils.clamp(finalPosition + distance, min, max);
if (newPosition != currPosition) {
mScroller.startScroll(currPosition, 0, newPosition - currPosition, 0, 0);
}
return finalPosition + distance - newPosition;
}
public void fling(int velocityX) {
if (getChildCount() > 0) {
int width = getWidth() - getPaddingRight() - getPaddingLeft();
int right = getChildAt(0).getWidth();
if (DEBUG) {
Log.d(TAG, "fling -> velocityX = " + velocityX);
Log.d(TAG, "fling -> getScrollX() = " + getScrollX());
}
mScroller.fling(
getScrollX(),
getScrollY(),
velocityX,
0,
0,
Math.max(0, right - width),
0,
0,
width / 2,
0);
int finalX = mScroller.getFinalX();
int overX = 0;
if (finalX <= 0 || finalX >= scrollPositionOfMostRecent()) {
overX = width / 2;
}
finalX = getScrollXFromFinalX(finalX);
if (DEBUG) {
Log.d(TAG, "fling -> finalX = " + finalX);
}
mScroller.startScroll(
getScrollX(), getScrollY(), finalX - getScrollX(), 0, getScrollTime(finalX));
final boolean movingRight = velocityX > 0;
postInvalidateOnAnimation();
}
}