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使用ListView来模仿微博随便看看栏
【分析】
要完成这个效果，我们需要：
1.ListView及ListView_Item
2.实体类的编写
3.自定义适配器的书写
4.ListView的绑定数据源与控件
【编码】
package cn.edu.bzu.adapter;
import java.util.List;
import cn.edu.bzu.entity.Information;
import cn.edu.bzu.weibo.R;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
/**
* 自定义Adapter实现listView的显示
* @author monster
* @date : 2015-04-28
*/
public class MyAdapter extends BaseAdapter {
private List<Information> list;
private Context mContext;
private LayoutInflater mInflater;
//定义构造方法
public MyAdapter(List<Information> list, Context mContext) {
super();
this.list = list;
this.mContext = mContext;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder=null;
if(convertView==null){
convertView=mInflater.from(mContext).inflate(R.layout.listview_item,null); //布局转换成视图
holder=new ViewHolder();
//实例化控件
holder.Image=(ImageView)convertView.findViewById(R.id.Iv);
holder.Name=(TextView)convertView.findViewById(R.id.Name);
holder.Time=(TextView)convertView.findViewById(R.id.Time);
holder.Contents=(TextView)convertView.findViewById(R.id.Contents);
convertView.setTag(holder); //设置setTag使得程序得以优化
}else{
holder=(ViewHolder) convertView.getTag();
}
//给控件赋值
holder.Image.setBackgroundResource(list.get(position).getImgId());
holder.Name.setText(list.get(position).getName());
holder.Time.setText(list.get(position).getDate());
holder.Contents.setText(list.get(position).getContent());
return convertView;
}
class ViewHolder{
ImageView Image;
TextView Name;
TextView Time;
TextView Contents;
}
}
MainActivity：
package cn.edu.bzu.weibo;import java.util.ArrayList;import java.util.List;import cn.edu.bzu.adapter.MyAdapter;import cn.edu.bzu.entity.Information;import android.os.Bundle;import android.widget.ListView;import android.app.Activity;public class MainActivity extends Activity { private ListView listView; private MyAdapter adapter; private List<Information> list; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); setData();//数据源 initView(); } private void initView() { // 初始化控件 listView=(ListView) findViewById(R.id.Lv); listView.setAdapter(adapter); //绑定适配器 } private void setData() { // 设置数据源 list=new ArrayList<Information>(); list.add(new Information(R.drawable.img1,"孙浩","2015-05-02","好好学习")); list.add(new Information(R.drawable.img2, "华华", "2015-05-02", "天天向上")); list.add(new Information(R.drawable.img3,"天天","2015-05-02","五一来了呀")); list.add(new Information(R.drawable.img4,"小云","2015-05-02","五一放假啦")); list.add(new Information(R.drawable.img5,"小雨","2015-05-02","开学开学了")); list.add(new Information(R.drawable.img6, "小张", "2015-05-02", "啦啦啦")); list.add(new Information(R.drawable.img7, "小新", "2015-05-02", "今天和闺蜜去超市，买了好多好多好吃的##")); adapter=new MyAdapter(list, MainActivity.this); } }
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原文地址：http://www.cnblogs.com/sh791165672/p/4477864.html
