Android_listview_scrollListener

layout.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <ListView 
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        ></ListView>

</RelativeLayout>

listview_item_name.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView 
        android:id="@+id/tv_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20sp"/>

</LinearLayout>

main.java

package com.example.day09_listview_scrolllistener;

import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity {

    protected static final String TAG = "MainActivity";
    private ListView listView;
    private List<String> data;
    private boolean isBottom = false;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView = (ListView) findViewById(R.id.listView);
        data = getData();
        MyAdapter myAdapter = new MyAdapter();
        //设置适配器
        listView.setAdapter(myAdapter);
        //设置滚动监听
        listView.setOnScrollListener(new OnScrollListener() {
            /**
             * 当滚动状态改变的时候调用
             * AbsListView view, listView的父类 
             * int scrollState 滚动状态
             */
            @Override
            public void onScrollStateChanged(AbsListView view, int scrollState) {
//                SCROLL_STATE_FLING 表示惯性滑动--2
//                SCROLL_STATE_IDLE   表示停止滑动--0
//                SCROLL_STATE_TOUCH_SCROLL 表示正在滑动--1
//                Log.i(TAG, "onScrollStateChanged----scrollState"+scrollState);
                //1.滑动到屏幕最底部2.停止滚动
                if(scrollState == OnScrollListener.SCROLL_STATE_IDLE && isBottom ==true){
                    Log.i(TAG, isBottom+"");
                    
                }
            }
            /**
             * 当listView滚动的时候调用,第一次加载时也会调用
             * int firstVisibleItem, 表示当前屏幕显示的第一条数据索引
             * int visibleItemCount, 表示当前屏幕显示的总数量
             *    int totalItemCount 表示的是数据的总数量
             */
            @Override
            public void onScroll(AbsListView view, int firstVisibleItem,
                    int visibleItemCount, int totalItemCount) {
                Log.i(TAG, "onScroll----firstVisibleItem-"+firstVisibleItem+"---visibleItemCount-"+visibleItemCount+"---totalItemCount"+totalItemCount);
                isBottom = (firstVisibleItem + visibleItemCount == totalItemCount);
            }
        });
    }
    private List<String> getData(){
        List<String> list = new ArrayList<String>();
        for (int i = 0; i < 100; i++) {
            list.add("杭州----"+i);
        }
        return list;
        
    }
    class MyAdapter extends BaseAdapter{

        @Override
        public int getCount() {
            return data.size();
        }

        @Override
        public Object getItem(int position) {
            return data.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            View view = convertView;
            ViewHolder viewHolder;
            if(view == null){
                view = View.inflate(MainActivity.this, R.layout.listview_item_name,null);            
                viewHolder = new ViewHolder();
                viewHolder.name = (TextView)view.findViewById(R.id.tv_name);
                view.setTag(viewHolder);
            }else{
                viewHolder = (ViewHolder) view.getTag();
            }
            viewHolder.name.setText(data.get(position));
        return view;
        }
    
    }
    class ViewHolder{
        private TextView name;
    }

}