import uk.co.senab.actionbarpulltorefresh.library.listeners.HeaderViewListener; //导入依赖的package包/类
void minimizeHeader() {
    if (isDestroyed()) return;

    mHeaderTransformer.onRefreshMinimized();

    if (mHeaderViewListener != null) {
        mHeaderViewListener.onStateChanged(mHeaderView, HeaderViewListener.STATE_MINIMIZED);
    }
}
 

import uk.co.senab.actionbarpulltorefresh.library.listeners.HeaderViewListener; //导入依赖的package包/类
void showHeaderView() {
    updateHeaderViewPosition(mHeaderView);
    if (mHeaderTransformer.showHeaderView()) {
        if (mHeaderViewListener != null) {
            mHeaderViewListener.onStateChanged(mHeaderView,
                    HeaderViewListener.STATE_VISIBLE);
        }
    }
}
 

import uk.co.senab.actionbarpulltorefresh.library.listeners.HeaderViewListener; //导入依赖的package包/类
void hideHeaderView() {
    if (mHeaderTransformer.hideHeaderView()) {
        if (mHeaderViewListener != null) {
            mHeaderViewListener.onStateChanged(mHeaderView,
                    HeaderViewListener.STATE_HIDDEN);
        }
    }
}
 

import uk.co.senab.actionbarpulltorefresh.library.listeners.HeaderViewListener; //导入依赖的package包/类
/**
 * Set a {@link HeaderViewListener} which is called when the visibility
 * state of the Header View has changed.
 */
final void setHeaderViewListener(HeaderViewListener listener) {
    mHeaderViewListener = listener;
}
 

import uk.co.senab.actionbarpulltorefresh.library.listeners.HeaderViewListener; //导入依赖的package包/类
/**
 * Set a {@link uk.co.senab.actionbarpulltorefresh.library.listeners.HeaderViewListener} which is called when the visibility
 * state of the Header View has changed.
 *
 * @param listener
 */
public final void setHeaderViewListener(HeaderViewListener listener) {
    ensureAttacher();
    mPullToRefreshAttacher.setHeaderViewListener(listener);
}