android ListView分页加载

本文主要参考文章：Android数据分批加载-滑动到底部自动加载列表网页里面一般就是有分页控件，然后分别给出pagesize和nowpagenumber就ok了，但是移动端的手机上不能这样做，分页就是通过一个简答的滑动实现的，例如：微信的朋友圈之类的。好了，下面上货==> 1、布局文件：

<?xml version="1.0" encoding="utf-8"?>

2、需要的一些资源（list列表样式和footer底部样式）：
footer.xml

<?xml version="1.0" encoding="utf-8"?>

simple_list.xml

<?xml version="1.0" encoding="utf-8"?>

3、MainActivity.java

package com.example.administrator.datapageload;import android.os.Handler;import android.os.Message;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.AbsListView;import android.widget.ArrayAdapter;import android.widget.ListView;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private final String TAG = MainActivity.class.getSimpleName();    private ListView listView;    private View footer;    private List data = new ArrayList();    ArrayAdapter adapter;    private boolean loadFinishFlag;    private int startIndex;    private int endIndex;    private final int pageSize = 20;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        listView = (ListView) this.findViewById(R.id.listview);        footer = getLayoutInflater().inflate(R.layout.footer, null);        loadFinishFlag = true;        startIndex = 0;        endIndex = pageSize;        data.addAll(getDataService(startIndex, endIndex));        adapter = new ArrayAdapter(this, R.layout.simple_list, R.id.simple_list_text, data);        listView.setAdapter(adapter);        listView.addFooterView(footer);        listView.setOnScrollListener(new ScrollListener());        listView.removeFooterView(footer);    }    /**     * 模拟加载数据     *     * @param from     * @param to     * @return     */    public List getDataService(int from, int to) {        List resList = new ArrayList<>();        for (int i = from; i < to; i++) {            resList.add("测试数据" + i);        }        return resList;    }    public final class ScrollListener implements AbsListView.OnScrollListener {        @Override        public void onScrollStateChanged(AbsListView view, int scrollState) {            Log.i(TAG, "---->" + scrollState);            switch (scrollState) {                case SCROLL_STATE_IDLE:                    break;                case SCROLL_STATE_TOUCH_SCROLL:                    break;                case SCROLL_STATE_FLING:                    break;            }        }        @Override        public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {            //获取屏幕最后Item的ID            int lastVisibleItem = listView.getLastVisiblePosition();            if (lastVisibleItem + 1 == totalItemCount) {                if (loadFinishFlag) {                    //标志位，防止多次加载                    loadFinishFlag = false;                    listView.addFooterView(footer);                    //开线程加载数据                    new Thread() {                        @Override                        public void run() {                            super.run();                            try {                                Thread.sleep(3000);                            } catch (InterruptedException e) {                                e.printStackTrace();                            }                            startIndex += pageSize;                            endIndex += pageSize;                            Message message = handler.obtainMessage(0x123, getDataService(startIndex, endIndex));                            message.sendToTarget();                        }                    }.start();                }            }        }    }    private Handler handler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            if (msg.what == 0x123) {                data.addAll((List) msg.obj);                adapter.notifyDataSetChanged();                listView.removeFooterView(footer);                loadFinishFlag = true;            }        }    };}

4、总结一下，就是监听滑动时间，发现滑动到底端的时候，进行继续加载。当然，加载采用线程和Handler的方式。需要注意的是加入标志位，如果不加，会加载很多次。
下面是运行结果：

在加载20条：
再加载20条：
最后附上项目代码：点我下载，不要你的积分哦！！！

android ListView分页加载

android ListView分页加载

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