Java AbsListView.OnScrollListener方法代码示例

import android.widget.AbsListView; //导入方法依赖的package包/类
private void setAbsListViewOnScrollListener(AbsListView absListView) {
    if (absListView != null) {
        try {
            // 通过反射获取滚动监听器，设置自己的滚动监听器后通知之前已有的监听
            Field field = AbsListView.class.getDeclaredField("mOnScrollListener");
            field.setAccessible(true);
            // 开发者自定义的滚动监听器
            AbsListView.OnScrollListener onScrollListener = (AbsListView.OnScrollListener) field.get(absListView);
            if (absListViewScrollListener == null) {
                absListViewScrollListener = new AbsListViewScrollListener();
            }
            if (onScrollListener != absListViewScrollListener){
                absListViewScrollListener.setOriginalListener(onScrollListener);
                absListView.setOnScrollListener(absListViewScrollListener);
            }
        } catch (Exception e) {
            Log.e(TAG, "反射获取AbsListView#OnScrollListener异常", e);
        }
    }
}
 

import android.widget.AbsListView; //导入方法依赖的package包/类
private void setAbsListViewOnScrollListener() {
    if (mAbsListView != null) {
        try {
            // 通过反射获取开发者自定义的滚动监听器，并将其替换成自己的滚动监听器，触发滚动时也要通知开发者自定义的滚动监听器（非侵入式，不让开发者继承特定的控件）
            // mAbsListView.getClass().getDeclaredField("mOnScrollListener")获取不到mOnScrollListener，必须通过AbsListView.class.getDeclaredField("mOnScrollListener")获取
            Field field = AbsListView.class.getDeclaredField("mOnScrollListener");
            field.setAccessible(true);
            // 开发者自定义的滚动监听器
            final AbsListView.OnScrollListener onScrollListener = (AbsListView.OnScrollListener) field.get(mAbsListView);
            mAbsListView.setOnScrollListener(new AbsListView.OnScrollListener() {
                @Override
                public void onScrollStateChanged(AbsListView absListView, int scrollState) {
                    if ((scrollState == SCROLL_STATE_IDLE || scrollState == SCROLL_STATE_FLING) && shouldHandleAbsListViewLoadingMore(mAbsListView)) {
                        beginLoadingMore();
                    }

                    if (onScrollListener != null) {
                        onScrollListener.onScrollStateChanged(absListView, scrollState);
                    }
                }

                @Override
                public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
                    if (onScrollListener != null) {
                        onScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
                    }
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
 

import android.widget.AbsListView; //导入方法依赖的package包/类
public RecyclerToListViewScrollListener(AbsListView.OnScrollListener scrollListener) {
  this.scrollListener = scrollListener;
}
 

import android.widget.AbsListView; //导入方法依赖的package包/类
public void setOnScrollListener(AbsListView.OnScrollListener onScrollListener) {
    this.onScrollListener = onScrollListener;
}
 

import android.widget.AbsListView; //导入方法依赖的package包/类
public void setOnScrollListener(AbsListView.OnScrollListener onScrollListener) {
        mOnScrollListener = onScrollListener;
}
 

import android.widget.AbsListView; //导入方法依赖的package包/类
/**
 * Return ScrollListener for ListView
 *
 * @return OnScrollListener
 */
public AbsListView.OnScrollListener makeScrollListener() {
    return new AbsListView.OnScrollListener() {

        private boolean isFirstItem = false;
        private boolean isLastItem = false;

        @Override
        public void onScrollStateChanged(AbsListView absListView, int scrollState) {
            setEnabled(scrollState != AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL);
            if (swipeClosesAllItemsWhenListMoves && scrollState == SCROLL_STATE_TOUCH_SCROLL) {
                closeOpenedItems();
            }
            if (scrollState == SCROLL_STATE_TOUCH_SCROLL) {
                listViewMoving = true;
                setEnabled(false);
            }
            if (scrollState != AbsListView.OnScrollListener.SCROLL_STATE_FLING && scrollState != SCROLL_STATE_TOUCH_SCROLL) {
                listViewMoving = false;
                downPosition = ListView.INVALID_POSITION;
                swipeListView.resetScrolling();
                new Handler().postDelayed(new Runnable() {
                    public void run() {
                        setEnabled(true);
                    }
                }, 500);
            }
        }

        @Override
        public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
            if (isFirstItem) {
                boolean onSecondItemList = firstVisibleItem == 1;
                if (onSecondItemList) {
                    isFirstItem = false;
                }
            } else {
                boolean onFirstItemList = firstVisibleItem == 0;
                if (onFirstItemList) {
                    isFirstItem = true;
                    swipeListView.onFirstListItem();
                }
            }
            if (isLastItem) {
                boolean onBeforeLastItemList = firstVisibleItem + visibleItemCount == totalItemCount - 1;
                if (onBeforeLastItemList) {
                    isLastItem = false;
                }
            } else {
                boolean onLastItemList = firstVisibleItem + visibleItemCount >= totalItemCount;
                if (onLastItemList) {
                    isLastItem = true;
                    swipeListView.onLastListItem();
                }
            }
        }
    };
}
 

import android.widget.AbsListView; //导入方法依赖的package包/类
public RecyclerToListViewScrollListener(AbsListView.OnScrollListener scrollListener) {
    this.scrollListener = scrollListener;
}
 

import android.widget.AbsListView; //导入方法依赖的package包/类
/**
 * 设置listview的滚动监听
 */
public void setScrollListener(AbsListView.OnScrollListener mScrollListener) {
    this.mScrollListener = mScrollListener;
}
 

import android.widget.AbsListView; //导入方法依赖的package包/类
void setOriginalListener(AbsListView.OnScrollListener originalListener) {
    this.originalListener = originalListener;
}
 

import android.widget.AbsListView; //导入方法依赖的package包/类
public void setOnScrollListener(AbsListView.OnScrollListener l) {
    mExternalOnScrollListener = l;
}