package com.exampleandroid.xiong.listviewpages;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
public class DbSqliteNews extends SQLiteOpenHelper {
public DbSqliteNews(Context context, String name, CursorFactory factory,
int version) {
super(context, name, factory, version);
}
// 创建数据库表
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table tb_newstile(news_id integer ,news_title varchar(100))");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
package com.exampleandroid.xiong.listviewpages;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity {
private ListView newShow_list;
private Button loadmore, adddata;
// ListView加载的数据
private List<News> shownews;
private GetNews getnews;
private DbSqliteNews dbnews;
// 加载的页数
private int pagecount = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
newShow_list = (ListView) findViewById(R.id.newsShow_list);
loadmore = (Button) findViewById(R.id.loadmore_bt);
adddata = (Button) findViewById(R.id.adddata);
dbnews = new DbSqliteNews(this, "new.db", null, 1);
getnews = new GetNews();
final ListAdpaterNews listadpter=new ListAdpaterNews();
//此按钮只为添加测试数据
adddata.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//插入数据
getnews.insertData(dbnews);
//获取数据
shownews = getnews.getListNews(pagecount, dbnews);
//显示数据
newShow_list.setAdapter(listadpter);
}
});
loadmore.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
pagecount++;
//将数据追加到原集合
shownews.addAll(getnews.getListNews(pagecount, dbnews));
//刷新数据
listadpter.notifyDataSetInvalidated();
}
});
// 第一次加载的数据
shownews = getnews.getListNews(pagecount, dbnews);
newShow_list.setAdapter(listadpter);
}
class ListAdpaterNews extends BaseAdapter {
@Override
public int getCount() {
return pagecount * 5;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = LayoutInflater.from(MainActivity.this).inflate(
R.layout.news_title, null);
TextView txttitle = (TextView) view.findViewById(R.id.txt_title);
ImageView images = (ImageView) view
.findViewById(R.id.showimage_title);
images.setBackgroundResource(R.drawable.n_me_l);
txttitle.setText(shownews.get(position).getTitle());
return view;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
