public void moveView(int deltaY) {
mHolder.move(deltaY);
mHeaderView.offsetTopAndBottom(deltaY);
mContentView.offsetTopAndBottom(deltaY);
if (needAddFooterView()) {
mFooterView.offsetTopAndBottom(deltaY);
}
invalidate();
if (mRefreshViewListener != null && (mContentView.isTop() || mPullRefreshing)) {
double offset = 1.0 * mHolder.mOffsetY / mHeaderViewHeight;
offset = offset > 1 ? 1 : offset;
mRefreshViewListener.onHeaderMove(offset, mHolder.mOffsetY);
mHeaderCallBack.onHeaderMove(offset, mHolder.mOffsetY);
}
}
public void startRefresh() {
if (mHolder.mOffsetY != 0 || mContentView.isLoading() || !isEnabled()) {
return;
}
// 如果条件成立，代表布局还没有初始化完成，改变标记，等待该方法再次调用，完成开始刷新
if (mHeaderCallBack == null) {
this.autoRefresh = true;
} else {
mPullRefreshing = true;
if (mRefreshViewListener != null) {
mRefreshViewListener.onRefresh();
}
mContentView.scrollToTop();
updateHeaderHeight(0, mHeaderViewHeight, 0);
}
}
private void startLoadMore() {
mPullLoading = true;
if (mRefreshViewListener != null) {
mRefreshViewListener.onLoadMore(false);
}
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
final int action = ev.getAction();
int deltaY = 0;
int deltaX = 0;
switch (action) {
case MotionEvent.ACTION_DOWN:
mHasSendCancelEvent = false;
mHasSendDownEvent = false;
mLastY = (int) ev.getRawY();
mLastX = (int) ev.getRawX();
mInitialMotionY = mLastY;
// if (!mScroller.isFinished() && !mPullRefreshing && !mPullLoading)
// {
// mScroller.forceFinished(true);
// }
break;
case MotionEvent.ACTION_MOVE:
mLastMoveEvent = ev;
if (mPullLoading
|| mPullRefreshing
|| !isEnabled()
|| mIsIntercept
|| mHasScrollBack
|| mContentView.isLoading()) {
if (mIsPinnedContentWhenRefreshing) {
return super.dispatchTouchEvent(ev);
} else {
sendCancelEvent();
return true;
}
}
int currentY = (int) ev.getRawY();
int currentX = (int) ev.getRawX();
deltaY = currentY - mLastY;
deltaX = currentX - mLastX;
mLastY = currentY;
mLastX = currentX;
// intercept the MotionEvent only when user is not scrolling
if (!isIntercepted && (Math.abs(deltaY) < mTouchSlop)) {
isIntercepted = true;
return super.dispatchTouchEvent(ev);
}
if (isForHorizontalMove
&& !mMoveForHorizontal
&& Math.abs(deltaX) > mTouchSlop
&& Math.abs(deltaX) > Math.abs(deltaY)) {
if (mHolder.mOffsetY == 0) {
mMoveForHorizontal = true;
}
}
if (mMoveForHorizontal) {
return super.dispatchTouchEvent(ev);
}
LogUtils.d("isTop=" + mContentView.isTop() + ";isBottom=" + mContentView.isBottom());
if (deltaY > 0 && mHolder.mOffsetY <= mHeadMoveDistence || deltaY < 0) {
deltaY = (int) (deltaY / OFFSET_RADIO);
} else {
deltaY = 0;
}
if (mContentView.isTop() && (deltaY > 0 || (deltaY < 0 && mHolder.hasHeaderPullDown()))) {
sendCancelEvent();
updateHeaderHeight(currentY, deltaY);
} else if (needAddFooterView()
&& mContentView.isBottom()
&& (deltaY < 0 || deltaY > 0 && mHolder.hasFooterPullUp())) {
sendCancelEvent();
updateFooterHeight(deltaY);
} else if (mContentView.isTop() && !mHolder.hasHeaderPullDown()
|| mContentView.isBottom() && !mHolder.hasFooterPullUp()) {
if (Math.abs(deltaY) > 0) sendDownEvent();
}
break;
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
// if (mHolder.mOffsetY != 0 && mRefreshViewListener != null
// && !mPullRefreshing && !mPullLoading) {
// mRefreshViewListener.onRelease(mHolder.mOffsetY);
// }
if (mHolder.hasHeaderPullDown() && !mHasScrollBack) {
// invoke refresh
if (mEnablePullRefresh && mHolder.mOffsetY > mHeaderViewHeight) {
mPullRefreshing = true;
mHeaderCallBack.onStateRefreshing();
mState = XRefreshViewState.STATE_REFRESHING;
if (mRefreshViewListener != null) {
mRefreshViewListener.onRefresh();
}
}
resetHeaderHeight();
} else if (mHolder.hasFooterPullUp()) {
if (mEnablePullLoad && needAddFooterView() && !mHasLoadComplete) {
invoketLoadMore();
} else {
int offset = 0 - mHolder.mOffsetY;
startScroll(offset, SCROLL_DURATION);
}
}
mLastY = -1; // reset
mInitialMotionY = 0;
isIntercepted = true;
mMoveForHorizontal = false;
mIsIntercept = false;
break;
}
return super.dispatchTouchEvent(ev);
}