android listview滑动 示例代码

【核心代码】

package com.example.fdfdfdf;





import java.util.ArrayList;



import za.co.immedia.pinnedheaderlistview.PinnedHeaderListView;
import za.co.immedia.pinnedheaderlistview.PinnedHeaderListView.OnItemClickListener;
import za.co.immedia.pinnedheaderlistview.SectionedBaseAdapter;
import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnScrollListener {
	private PinnedHeaderListView mListView;
	private int visibleLastIndex = 0;   //最后的可视项索引    
    private int visibleItemCount;       // 当前窗口可见项总数   
	private View loadMoreView; 
	private Button loadMoreButton;   
	private Handler handler = new Handler(); 
	private MySectionAdapter adapter;
	private ArrayList<String> mineInfoList = new ArrayList<String>();;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		
		loadMoreView = getLayoutInflater().inflate(R.layout.load_more, null);    
        
        
        mListView = (PinnedHeaderListView) findViewById(R.id.list_warningdetials);
        mListView.addFooterView(loadMoreView);   //设置列表底部视图   
		adapter=new MySectionAdapter();
		mineInfoList.add("1");
		mineInfoList.add("2");
		mineInfoList.add("3");
		mListView.setAdapter(adapter);
		
		mListView.setOnScrollListener(this);     //添加滑动监听    
		mListView.setOnItemClickListener(new OnItemClickListener() {  

             

			

			@Override
			public void onSectionClick(AdapterView<?> adapterView, View view,
					int section, long id) {
				// TODO Auto-generated method stub
				
			}



			@Override
			public void onItemClick(AdapterView<?> adapterView, View view,
					int section, int position, long id) {
				// TODO Auto-generated method stub
				
			}  
         });  
		loadMoreButton = (Button) loadMoreView.findViewById(R.id.loadMoreButton);    
        loadMoreButton.setOnClickListener(new OnClickListener() {  
              
            @Override  
            public void onClick(View v) {  
                // TODO Auto-generated method stub  
                loadMoreButton.setText("正在加载...");   //设置按钮文字loading    
                handler.postDelayed(new Runnable() {    
                    @Override    
                    public void run() {    
                            
                        loadData();    
                            
                        adapter.notifyDataSetChanged(); //数据集变化后,通知adapter    
                        mListView.setSelection(visibleLastIndex - visibleItemCount   1); //设置选中项    
                            
                        loadMoreButton.setText("加载更多");    //恢复按钮文字    
                    }    
                }, 1000);    
            }  
        });  
	}
	/**   
     * 模拟加载数据   
     */    
    private void loadData() {    
        //int count = adapter.getCount();    
        //for (int i = count; i < count   20; i  ) {    
        	mineInfoList.add("4");    
        //}    
    } 
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	
	private class MySectionAdapter extends SectionedBaseAdapter{

		@Override
		public Object getItem(int section, int position) {
			// TODO Auto-generated method stub
			return null;
		}

		@Override
		public long getItemId(int section, int position) {
			// TODO Auto-generated method stub
			return 0;
		}

		@Override
		public int getSectionCount() {
			// TODO Auto-generated method stub
			return mineInfoList.size();
		}

		@Override
		public int getCountForSection(int section) {
			// TODO Auto-generated method stub
			return mineInfoList.size();
		}

		@Override
		public View getItemView(int section, int position, View convertView,
				ViewGroup parent) {
			// TODO Auto-generated method stub
			View layout=getLayoutInflater().inflate(R.layout.layout_list_warningdetials, null);
			TextView tv_warningarea=(TextView) layout.findViewById(R.id.tv_warning_area);
			tv_warningarea.setText(mineInfoList.get(position));
			return layout;
		}

		@Override
		public View getSectionHeaderView(int section, View convertView,
				ViewGroup parent) {
			// TODO Auto-generated method stub
			View layout=getLayoutInflater().inflate(R.layout.item_section, null);
			return layout;
		}
		
	}

	@Override
	public void onScroll(AbsListView view, int firstVisibleItem,
			int visibleItemCount, int totalItemCount) {
		// TODO Auto-generated method stub
		 this.visibleItemCount = visibleItemCount;    
         visibleLastIndex = firstVisibleItem   visibleItemCount - 1;  
		
	}

	@Override
	public void onScrollStateChanged(AbsListView view, int scrollState) {
		// TODO Auto-generated method stub
		int itemsLastIndex = adapter.getCount() - 1;    //数据集最后一项的索引    
        int lastIndex = itemsLastIndex   1;             //加上底部的loadMoreView项    
        if (scrollState == OnScrollListener.SCROLL_STATE_IDLE && visibleLastIndex == lastIndex) {    
            //如果是自动加载,可以在这里放置异步加载数据的代码    
            Log.i("LOADMORE", "loading...");    
        }    
	}


}