这期内容当中小编将会给大家带来有关Android开发中利用ListView怎么实现一个分页加载功能,文章内容丰富且以专业的角度为大家分析和叙述,阅读完这篇文章希望大家可以有所收获。具体如下:package eoe.listview;impo
这期内容当中小编将会给大家带来有关Android开发中利用ListView怎么实现一个分页加载功能,文章内容丰富且以专业的角度为大家分析和叙述,阅读完这篇文章希望大家可以有所收获。
具体如下:
package eoe.listview;import android.app.Activity;import android.database.Cursor;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.widget.AdapterView;import android.widget.ListView;import android.widget.ProgressBar;import android.widget.TextView;import android.widget.AdapterView.OnItemSelectedListener;public class MainActivity extends Activity { private ListView listview; private ProgressBar loadBar; private TextView loadText; private ShopAdapter adapter; private int start=0; //开始数量 private int limit=3; //每页数量 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); listview=(ListView)findViewById(R.id.main_ListView); loadBar=(ProgressBar)findViewById(R.id.main_loadBar); loadText=(TextView)findViewById(R.id.main_loadText); adapter=new ShopAdapter(this); listview.setAdapter(adapter); listview.setOnItemSelectedListener(new OnItemSelectedListener(){ @Override public void onItemSelected(AdapterView arg0, View arg1, int count, long arg3) { if(adapter.getCount()==count+1){ loadText.setText("下载中..."); loadBar.setVisibility(View.VISIBLE); new Thread(mRunnable).start(); } } @Override public void onNothingSelected(AdapterView arg0) { } }); new Thread(mRunnable).start(); } private Runnable mRunnable=new Runnable(){ public void run(){ try { Thread.sleep(1500); mHandler.sendMessage(mHandler.obtainMessage()); } catch (InterruptedException e) { //System.out.println("Error-"+e.getMessage()); } } }; Handler mHandler=new Handler(){ public void handleMessage(Message msg){ super.handleMessage(msg); loadHotShop(limit); } }; public void loadHotShop(int limit){ DBLocalService db=new DBLocalService(this); Cursor cursor=db.querysql("select * from "+db.TABLE_SHOP+" limit "+start+","+limit,null); if(cursor.getCount()>0) this.start+=limit; while(cursor.moveToNext()){ Shop s=new Shop(); s.setId(cursor.getString(cursor.getColumnIndex("id"))); s.setTitle(cursor.getString(cursor.getColumnIndex("title"))); adapter.addShop(s); } loadText.setText(""); loadBar.setVisibility(View.GoNE); }}
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本文标题: Android开发中利用ListView怎么实现一个分页加载功能
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