android 动态加载Listview

package rw.listview;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;import android.widget.AbsListView.OnScrollListener;public class listviewActivity extends Activity implements OnScrollListener {    private listViewAdapter adapter ;    ListView listView;    private Thread mThread;    private LayoutInflater layoutInflater;    private View footerView;    List<String> olist = new ArrayList<String>();    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        init();    }    private void init() {           //LayoutInflater是用来找layout下xml布局文件，并且实例化！            layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);            footerView = layoutInflater.inflate(R.layout.list, null);        // 得到一个ListView用来显示条目        listView = (ListView) findViewById(R.id.tv);       // 添加到脚页显示,当光标到最下面的是的时候，出发这个方法        listView.addFooterView(footerView);        olist.add("000000");        olist.add("111111");        olist.add("222222");        olist.add("333333");        olist.add("444444");        olist.add("555555");        olist.add("666666");        olist.add("777777");        olist.add("888888");        olist.add("999999");        olist.add("-------------------");        adapter = new listViewAdapter(this, 0, olist);       // 给ListView添加适配器        listView.setAdapter(adapter);        // 给ListView注册滚动监听        listView.setOnScrollListener(this);    }    /**     * 生成显示数据     */    class listViewAdapter extends ArrayAdapter<String> {            private List<String> myList;                int count = 10;        public String getItem(int pos) {            return myList.get(pos);        }        public listViewAdapter(Context context,  int textViewResourceId, List<String> objects) {                        super(context, textViewResourceId, objects);                        this.myList = objects;                }        public View getView(int pos, View v, ViewGroup p) {            TextView view;            if (v == null) {                view = new TextView(listviewActivity.this);            } else {                view = (TextView) v;            }            view.setText("ListItem" + getItem(pos));            view.setTextSize(20f);            view.setGravity(Gravity.CENTER);            view.setHeight(60);            return view;        }    }    @Override    public void onScroll(AbsListView view, int firstVisibleItem,            int visibleItemCount, int totalItemCount) {        // TODO Auto-generated method stub    //当前页面可以看见的第一个ListItem+当前所有看见的ListItem=适配器上总共的ListItem，说明Scroll到最下面了        if(firstVisibleItem+visibleItemCount==totalItemCount)        {            //开线程去下载网络数据            if (mThread == null || !mThread.isAlive()) {                mThread = new Thread() {                    @Override                    public void run() {                        try {                                if (adapter.count <= 49) {                                    //这里放你网络数据请求的方法，我在这里用线程休眠5秒方法来处理                                        olist.add("1  &" + adapter.count);                                        olist.add("2  &" + adapter.count);                                        olist.add("3  &" + adapter.count);                                        olist.add("4  &" + adapter.count);                                        olist.add("5  &" + adapter.count);                                        olist.add("6  &" + adapter.count);                                        olist.add("7  &" + adapter.count);                                                                        olist.add("8  &" + adapter.count);                                        olist.add("9  &" + adapter.count);                                        olist.add("------------------->");                                }                            Thread.sleep(5000);                        } catch (InterruptedException e) {                            e.printStackTrace();                        }                       //用handler 传递线程                        Message message = new Message();                        message.what = 1;                        handler.sendMessage(message);                    }                };                mThread.start();                            }        }    }    @Override    public void onScrollStateChanged(AbsListView view, int scrollState) {        // TODO Auto-generated method stub            }    private Handler handler = new Handler() {        @Override        public void handleMessage(Message msg) {            // TODO Auto-generated method stub            switch (msg.what) {            case 1:                if (adapter.count <= 49) {                    adapter.count += 10;                    int currentPage = adapter.count / 10;                    Toast.makeText(getApplicationContext(),"第" + currentPage + "页", Toast.LENGTH_LONG).show();                } else {                    listView.removeFooterView(footerView);                    Toast.makeText(getApplicationContext(),"木有数据了！", Toast.LENGTH_LONG).show();                }                //重新刷新Listview的adapter里面数据                adapter.notifyDataSetChanged();                break;            default:                break;            }        }    };   // private List<Map<String, Object>> list=}

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><ListView android:id="@+id/tv"      android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="@string/hello"    /></LinearLayout>

文件list.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:orientation="vertical">    <LinearLayout android:id="@+id/linearLayout1"             android:layout_gravity="top|center_horizontal"             android:layout_height="wrap_content"             android:layout_width="wrap_content"             android:layout_weight="1"             android:baselineAligned="true">        <ProgressBar android:layout_height="wrap_content"                android:id="@+id/progressBar1"                android:layout_width="wrap_content" />        <TextView android:text="加载中.."                android:layout_height="wrap_content"                android:layout_width="wrap_content"                android:layout_gravity="center_vertical"                android:id="@+id/textView1" />    </LinearLayout></LinearLayout>

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