private void setRefreshing(boolean refreshing, final boolean notify) {
if (mRefreshing != refreshing) {
mNotify = notify;
ensureTarget();
mRefreshing = refreshing;
if (mRefreshing) {
mRefreshDrawable.setPercent(1f);
animateOffsetToCorrectPosition();
} else {
animateOffsetToStartPosition();
}
}
}
@Override
public void onAnimationEnd(Animation animation) {
if (mRefreshing) {
mRefreshDrawable.start();
if (mNotify) {
if (mListener != null) {
mListener.onRefresh();
}
}
} else {
mRefreshDrawable.stop();
mRefreshView.setVisibility(View.GONE);
animateOffsetToStartPosition();
}
mCurrentOffsetTop = mTarget.getTop();
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
if (!mIsBeingDragged) {
return super.onTouchEvent(ev);
}
final int action = MotionEventCompat.getActionMasked(ev);
switch (action) {
case MotionEvent.ACTION_MOVE:
{
final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
if (pointerIndex < 0) {
return false;
}
final float y = MotionEventCompat.getY(ev, pointerIndex);
// final float yDiff = Math.abs(y - mInitialMotionY);
final float yDiff = y - mInitialMotionY;
final float scrollTop = yDiff * DRAG_RATE;
float originalDragPercent = scrollTop / mTotalDragDistance;
if (originalDragPercent < 0) {
return false;
}
float dragPercent = Math.min(1f, Math.abs(originalDragPercent));
// float adjustedPercent = (float) Math.max(dragPercent - .4, 0) * 5 / 3;
// float adjustedPercent = dragPercent;
float extraOS = Math.abs(scrollTop) - mTotalDragDistance;
float slingshotDist = mSpinnerFinalOffset;
float tensionSlingshotPercent =
Math.max(0, Math.min(extraOS, slingshotDist * 2) / slingshotDist);
float tensionPercent =
(float) ((tensionSlingshotPercent / 4) - Math.pow((tensionSlingshotPercent / 4), 2))
* 2f;
float extraMove = (slingshotDist) * tensionPercent * 2;
int targetY = (int) ((slingshotDist * dragPercent) + extraMove);
if (mRefreshView.getVisibility() != View.VISIBLE) {
mRefreshView.setVisibility(View.VISIBLE);
}
if (scrollTop < mTotalDragDistance) {
mRefreshDrawable.setPercent(dragPercent);
}
setTargetOffsetTop(targetY - mCurrentOffsetTop, true);
break;
}
case MotionEventCompat.ACTION_POINTER_DOWN:
final int index = MotionEventCompat.getActionIndex(ev);
mActivePointerId = MotionEventCompat.getPointerId(ev, index);
break;
case MotionEventCompat.ACTION_POINTER_UP:
onSecondaryPointerUp(ev);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
{
if (mActivePointerId == INVALID_POINTER) {
return false;
}
final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
final float y = MotionEventCompat.getY(ev, pointerIndex);
final float overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
mIsBeingDragged = false;
if (overscrollTop > mTotalDragDistance) {
setRefreshing(true, true);
} else {
mRefreshing = false;
animateOffsetToStartPosition();
}
mActivePointerId = INVALID_POINTER;
return false;
}
}
return true;
}