ListViewHandler.java

package com.shizhefei.mvc.viewhandler;

import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ListAdapter;
import android.widget.ListView;

import com.shizhefei.mvc.ILoadViewFactory.FootViewAdder;
import com.shizhefei.mvc.ILoadViewFactory.ILoadMoreView;
import com.shizhefei.mvc.MVCHelper.OnScrollBottomListener;

public class ListViewHandler implements ViewHandler {

    @Override
    public boolean handleSetAdapter(View contentView, Object viewAdapter, ILoadMoreView loadMoreView, OnClickListener onClickLoadMoreListener) {
        final ListView listView = (ListView) contentView;
        boolean hasInit = false;
        if (loadMoreView != null) {
            loadMoreView.init(new ListViewFootViewAdder(listView), onClickLoadMoreListener);
            hasInit = true;
        }
        if (listView instanceof ExpandableListView) {
            ((ExpandableListView) listView).setAdapter((ExpandableListAdapter) viewAdapter);
        } else {
            listView.setAdapter((ListAdapter) viewAdapter);
        }
        return hasInit;
    }

    @Override
    public void setOnScrollBottomListener(View contentView, OnScrollBottomListener onScrollBottomListener) {
        ListView listView = (ListView) contentView;
        listView.setOnScrollListener(new ListViewOnScrollListener(onScrollBottomListener));
        listView.setOnItemSelectedListener(new ListViewOnItemSelectedListener(onScrollBottomListener));
    }

    /**
     * 针对于电视 选择到了底部项的时候自动加载更多数据
     */
    private static class ListViewOnItemSelectedListener implements OnItemSelectedListener {
        private OnScrollBottomListener onScrollBottomListener;

        public ListViewOnItemSelectedListener(OnScrollBottomListener onScrollBottomListener) {
            super();
            this.onScrollBottomListener = onScrollBottomListener;
        }

        @Override
        public void onItemSelected(AdapterView<?> listView, View view, int position, long id) {
            if (listView.getLastVisiblePosition() + 1 == listView.getCount()) {// 如果滚动到最后一行
                if (onScrollBottomListener != null) {
                    onScrollBottomListener.onScorllBootom();
                }
            }
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    }

    ;

    /**
     * 滚动到底部自动加载更多数据
     */
    private static class ListViewOnScrollListener implements OnScrollListener {
        private OnScrollBottomListener onScrollBottomListener;

        public ListViewOnScrollListener(OnScrollBottomListener onScrollBottomListener) {
            super();
            this.onScrollBottomListener = onScrollBottomListener;
        }

        @Override
        public void onScrollStateChanged(AbsListView listView, int scrollState) {
            if (scrollState == OnScrollListener.SCROLL_STATE_IDLE && listView.getLastVisiblePosition() + 1 == listView.getCount()) {// 如果滚动到最后一行
                if (onScrollBottomListener != null) {
                    onScrollBottomListener.onScorllBootom();
                }
            }
        }

        @Override
        public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {

        }
    }

    ;

    private static class ListViewFootViewAdder implements FootViewAdder {
        private ListView listView;

        public ListViewFootViewAdder(ListView listView) {
            super();
            this.listView = listView;
        }

        @Override
        public View addFootView(int layoutId) {
            View view = LayoutInflater.from(listView.getContext()).inflate(layoutId, listView, false);
            return addFootView(view);
        }

        @Override
        public View addFootView(View view) {
            listView.addFooterView(view);
            return view;
        }

        @Override
        public View getContentView() {
            return listView;
        }

    }
}