ListViewDemo

来源：互联网发布：生物竞赛题库软件编辑：程序博客网时间：2024/06/05 09:35

//布局activity_main.xml：

//#########################布局item.xml：######################################

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"
android:orientation="horizontal">
<ImageView
android:id="@+id/image"
android:layout_width="50dp"
android:layout_height="50dp"
android:background="@drawable/ic_launcher"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginLeft="10dp"
android:layout_gravity="center"
android:orientation="vertical">
<TextView
android:id="@+id/name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="遇见"
android:textSize="13dp"/>
<TextView
android:id="@+id/content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="在哪里啊现在"
android:textSize="13dp"/>

</LinearLayout>
</LinearLayout>

</LinearLayout>

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

package com.listviewdemo.demo;

import java.util.List;

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;

public class ListAdapter extends BaseAdapter {

private List<ListBean> list;
private Context context;
private ListBean bean;

public ListAdapter(Context context,List<ListBean> list){

this.context=context;
this.list=list;
}

@Override
public int getCount() {
if (list!=null)
return list.size();
return 0;
}

@Override
public Object getItem(int position) {
return null;
}

@Override
public long getItemId(int position) {
return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

ViewHolder holder=null;
if (convertView==null){
holder=new ViewHolder();
convertView= LayoutInflater.from(context).inflate(R.layout.item,null);
holder.image=(ImageView)convertView.findViewById(R.id.image);
holder.name=(TextView)convertView.findViewById(R.id.name);
holder.content=(TextView)convertView.findViewById(R.id.content);
convertView.setTag(holder);
}else{

holder=(ViewHolder)convertView.getTag();
}

bean=list.get(position);
holder.image.setTag(bean.getImage());
holder.name.setTag(bean.getTitle());
holder.content.setTag(bean.getContent());

return convertView;
}

class ViewHolder{
private ImageView image;
private TextView name,content;
}
}

####################

###############

package com.listviewdemo.demo;

public class ListBean {

private String image;
private String title;
private String content;
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}

}

#################

###################################

package com.listviewdemo.demo;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.widget.ListView;

public class MainActivity extends Activity {
private ListView listView;
private ListAdapter adapter;
private List<ListBean> list=new ArrayList<ListBean>();
private ListBean bean;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

AddData();
}

public void AddData() {
listView=(ListView)findViewById(R.id.listview);
bean=new ListBean();
bean.getContent();
bean.getImage();
bean.getTitle();
for(int i=0;i<20;i++) {

list.add(bean);
}
adapter=new ListAdapter(this, list);
listView.setAdapter(adapter);
}
}

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