private void fireRefreshEvent() {
final RefreshEvent event = new RefreshEvent(this);
expungeRefreshListeners();
for (final Reference<RefreshListener> reference : refreshListeners) {
final RefreshListener listener = reference.get();
if (listener != null) listener.onRefresh(event);
}
}
/**
* this is used when someone hits the "refresh" button
*
* @param e
*/
@Override
public void actionPerformed(ActionEvent e) {
// the button has been pressed
// how many refresh listeners?
this.outstandingRefreshActions = refreshListeners.size();
setRefreshButtonRed(this.outstandingRefreshActions);
for (RefreshListener refreshListener : refreshListeners) {
refreshListener.refreshAction();
}
}
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case REFRESH_BACKING: // 反弹中
mHeaderLinearLayout.setPadding(
mHeaderLinearLayout.getPaddingLeft(),
(int) (mHeaderLinearLayout.getPaddingTop() * 0.75f),
mHeaderLinearLayout.getPaddingRight(),
mHeaderLinearLayout.getPaddingBottom());
showProgressBar();
break;
case REFRESH_BACED: // 达到刷新界限，反弹结束后,加载数据
headerInfo.setText("正在加载...");
rotateArrow(ROTATE_DOWN);
showProgressBar();
mPullRefreshState = EXIT_PULL_REFRESH;
new Thread() {
public void run() {
if (mRefreshListener != null) {
mRefreshObject = mRefreshListener.refreshing();
}
Message msg = mHandler.obtainMessage();
msg.what = REFRESH_DONE;
msg.sendToTarget();
};
}.start();
break;
case REFRESH_RETURN: // 没有达到刷新界限，返回
headerInfo.setText("下拉刷新");
rotateArrow(ROTATE_DOWN);
showArrow();
mHeaderLinearLayout.setPadding(
mHeaderLinearLayout.getPaddingLeft(),
0,
mHeaderLinearLayout.getPaddingRight(),
mHeaderLinearLayout.getPaddingBottom());
mPullRefreshState = NONE_PULL_REFRESH;
setSelection(1);
break;
case REFRESH_DONE: // 加载数据结束
headerInfo.setText("下拉刷新");
headerTime.setText("更新时间为: " + mSimpleDateFormat.format(new Date()));
rotateArrow(ROTATE_DOWN);
showArrow();
mHeaderLinearLayout.setPadding(
mHeaderLinearLayout.getPaddingLeft(),
0,
mHeaderLinearLayout.getPaddingRight(),
mHeaderLinearLayout.getPaddingBottom());
mPullRefreshState = NONE_PULL_REFRESH;
setSelection(1);
if (mRefreshListener != null) {
mRefreshListener.refreshed(mRefreshObject);
}
break;
}
};
private void refresh() {
// TODO Auto-generated method stub
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) this.refreshView.getLayoutParams();
int i = lp.topMargin;
reFreshTimeLayout.setVisibility(View.GONE);
refreshIndicatorView.setVisibility(View.GONE);
bar.setVisibility(View.VISIBLE);
timeTextView.setVisibility(View.GONE);
downTextView.setVisibility(View.GONE);
scroller.startScroll(0, i, 0, 0 - i);
invalidate();
if (refreshListener != null) {
refreshListener.onRefresh(this);
isRefreshing = true;
}
}
@Override
public boolean onTouch(View v, MotionEvent event) {
if (refreshListener.isAbleToPull() == false) {
return false;
}
int action = event.getAction();
if (action == MotionEvent.ACTION_DOWN) {
downY = event.getRawY();
} else if (action == MotionEvent.ACTION_MOVE) {
float curY = event.getRawY();
int deltaY = (int) (curY - downY);
if (deltaY < touchSlop) {
status = IDLE;
isSlop = true;
return false;
}
isSlop = false;
int topMargin = deltaY / 2;
int top = topMargin + hideHeaderTop;
if (top < hideHeaderTop) {
top = hideHeaderTop;
}
if (top > 0) {
status = RELEASE_TO_REFRESH;
} else if (top < 0) {
status = PULL_TO_REFRESH;
}
setMargin(top);
if (status == PULL_TO_REFRESH || status == RELEASE_TO_REFRESH) {
updateHeaderView();
attachedView.setFocusable(false);
attachedView.setFocusableInTouchMode(false);
attachedView.setPressed(false);
lastStatus = status;
}
} else if (action == MotionEvent.ACTION_UP) {
if (status == RELEASE_TO_REFRESH) {
new RefreshingTask().execute();
} else if (status == PULL_TO_REFRESH) {
new HideHeaderTask().execute();
}
}
if (isSlop) {
return false;
}
return true;
}