Android ListView 滾動式載入資料

1. 預覽

 

2. 代碼

 

package android.test;<br />import java.util.ArrayList;<br />import android.app.Activity;<br />import android.app.ProgressDialog;<br />import android.os.Bundle;<br />import android.os.Handler;<br />import android.os.Message;<br />import android.widget.AbsListView;<br />import android.widget.ArrayAdapter;<br />import android.widget.ListView;<br />import android.widget.AbsListView.OnScrollListener;<br />public class Main extends Activity implements Runnable {<br />private ListView m_listView;<br />private ArrayList<String> m_data = new ArrayList<String>();<br />private ArrayAdapter<String> m_adapter;<br />private ProgressDialog m_progressDlg;</p><p>private int m_nLastItem = 0;<br />private Handler m_handler = new Handler() {<br />@Override<br />public void handleMessage(Message msg) {<br />m_progressDlg.dismiss();<br />for (int i = m_listView.getCount(); i < m_listView.getCount() + 10; ++i) {<br />m_data.add("test__" + i);<br />}<br />m_adapter.notifyDataSetChanged();<br />m_listView.setSelection(m_nLastItem - 1);<br />}<br />};<br />/** Called when the activity is first created. */<br />@Override<br />public void onCreate(Bundle savedInstanceState) {<br />super.onCreate(savedInstanceState);<br />setContentView(R.layout.main);<br />m_listView = (ListView) findViewById(R.id.listView1);<br />for (int i = 0; i < 10; ++i) {<br />m_data.add("test__" + i);<br />}<br />m_adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, m_data);<br />m_listView.setAdapter(m_adapter);<br />m_listView.setOnScrollListener(new OnScrollListener() {<br />@Override<br />public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {<br />m_nLastItem = firstVisibleItem + visibleItemCount;<br />}<br />@Override<br />public void onScrollStateChanged(AbsListView view, int scrollState) {<br />if (m_nLastItem == m_adapter.getCount() && scrollState == OnScrollListener.SCROLL_STATE_IDLE) {<br />LoadRemainingItems();<br />}<br />}<br />});<br />}<br />private void LoadRemainingItems() {<br />m_progressDlg = ProgressDialog.show(Main.this, "資訊", "正在載入資料...", true);<br />Thread t = new Thread(Main.this);<br />t.start();<br />}<br />@Override<br />public void run() {<br />try {<br />Thread.sleep(3000);<br />m_handler.sendEmptyMessage(0);<br />} catch (InterruptedException e) {<br />e.printStackTrace();<br />}<br />}<br />}