标签：
Android——ListView与适配器
1.抽屉布局 Drawer
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.jreduch7292.MyDrawerActivity"
android:id="@+id/drawer_layout"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tv"
android:gravity="center"
android:text="我的主布局"
/>
</RelativeLayout>
<LinearLayout
android:layout_width="300dp"
android:layout_height="match_parent"
android:background="#f9f113"
android:layout_gravity="start"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#b9b9c4"
android:orientation="horizontal">
<ImageView
android:layout_width="50dp"
android:layout_height="50dp"
android:src="@mipmap/zyfzyf"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="抽屉1"
/>
</LinearLayout>
</LinearLayout>
</android.support.v4.widget.DrawerLayout>
2.ListView新闻列表
package com.example.jreduch7292.listdemo;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import com.example.jreduch7292.R;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class ListActivity extends AppCompatActivity {
private ListView lv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list);
lv=(ListView)findViewById(R.id.lv);
// List list=new ArrayList();
// list.add("张三 123");
// list.add("张四 1234");
// list.add("张五 12345");
// list.add("张六 123456");
// list.add("张三 123");
// list.add("张四 1234");
// list.add("张五 12345");
// list.add("张六 123456");
// list.add("张三 123");
// list.add("张四 1234");
// list.add("张五 12345");
// list.add("张六 123456");
// list.add("张三 123");
// list.add("张四 1234");
// list.add("张五 12345");
// list.add("张六 123456");
// ArrayAdapter aa=new ArrayAdapter(this,
// android.R.layout.simple_list_item_1,list);
// lv.setAdapter(aa);
final List list=new ArrayList();
Map map=new HashMap();
map.put("img",R.mipmap.a);
map.put("name","字母A张三 1121132323");
list.add(map);
map=new HashMap();
map.put("img",R.mipmap.b);
map.put("name","字母B张四 123444434");
list.add(map);
map=new HashMap();
map.put("img",R.mipmap.c);
map.put("name","字母C张五 12334233");
list.add(map);
map=new HashMap();
map.put("img",R.mipmap.d);
map.put("name","字母D张六 11323456");
list.add(map);
map=new HashMap();
map.put("img",R.mipmap.e);
map.put("name","字母E张五 12323445");
list.add(map);
map=new HashMap();
map.put("img",R.mipmap.f);
map.put("name","字母F张四 12324424");
list.add(map);
map=new HashMap();
map.put("img",R.mipmap.g);
map.put("name","字母G张五 12322445");
list.add(map);
map=new HashMap();
map.put("img",R.mipmap.h);
map.put("name","字母H张六 12233456");
list.add(map);
/*
1.simpleAdapter使用的数据源必须继承Map接口
2.from参数的意思是指向数据源Map中的键
3.to 参数的意思是为布局中的控件Id赋值
*/
SimpleAdapter sa=new SimpleAdapter(this,list,
R.layout.lll,
new String[]{"img","name"},
new int[]{R.id.iv,R.id.tv});
lv.setAdapter(sa);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getBaseContext(),"点击行："+id,Toast.LENGTH_SHORT).show();
}
});
}
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.jreduch7292.listdemo.ListActivity">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:dividerHeight="5dp"
android:divider="@color/colorPrimary"
android:id="@+id/lv"
android:scrollbars="none"
android:listSelector="@color/colorAccent"
>
</ListView>
</RelativeLayout>
图片+汉子布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:scaleType="centerCrop"
android:id="@+id/iv"
android:src="@mipmap/ic_launcher"
/><!--android:scaleType="centerCrop"等比例缩放-->
<TextView
android:layout_width="match_parent"
android:layout_height="100dp"
android:id="@+id/tv"
android:textSize="40sp"
android:gravity="center"
android:text="测试"
/>
</LinearLayout>
ListView多布局
ListView优化-----分段显示
新闻ListView---------------------重点重点重点
package com.example.jreduch7292.entity;
/**
* Created by 冲天之峰 on 2016/8/3.
*/
public class News {
private String title;
private String pubDate;
private String newId;
private int img;
private String from;
public News(String title, String pubDate, String newId, int img, String from) {
this.title = title;
this.pubDate = pubDate;
this.newId = newId;
this.img = img;
this.from = from;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getFrom() {
return from;
}
public void setFrom(String from) {
this.from = from;
}
public int getImg() {
return img;
}
public void setImg(int img) {
this.img = img;
}
public String getNewId() {
return newId;
}
public void setNewId(String newId) {
this.newId = newId;
}
public String getPubDate() {
return pubDate;
}
public void setPubDate(String pubDate) {
this.pubDate = pubDate;
}
}
package com.example.jreduch7292.entity;
/**
* Created by 冲天之峰 on 2016/8/3.
*/
public class News {
private String title;
private String pubDate;
private String newId;
private int img;
private String from;
public News(String title, String pubDate, String newId, int img, String from) {
this.title = title;
this.pubDate = pubDate;
this.newId = newId;
this.img = img;
this.from = from;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getFrom() {
return from;
}
public void setFrom(String from) {
this.from = from;
}
public int getImg() {
return img;
}
public void setImg(int img) {
this.img = img;
}
public String getNewId() {
return newId;
}
public void setNewId(String newId) {
this.newId = newId;
}
public String getPubDate() {
return pubDate;
}
public void setPubDate(String pubDate) {
this.pubDate = pubDate;
}
}
布局程序
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="我是标题"
android:gravity="center"
android:id="@+id/title"
android:layout_alignParentTop="true"
android:layout_alignBottom="@+id/img"
android:layout_alignParentStart="true"
android:layout_toStartOf="@+id/img" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="未来网"
android:gravity="center"
android:id="@+id/from"
android:layout_below="@+id/img"
android:layout_alignParentStart="true" />
<ImageView
android:layout_width="60dp"
android:layout_height="60dp"
android:src="@mipmap/ic_launcher"
android:id="@+id/img"
android:scaleType="centerCrop"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="今天"
android:gravity="center"
android:id="@+id/time"
android:layout_below="@+id/img"
android:layout_alignStart="@+id/img" />
</RelativeLayout>package com.example.jreduch7292.listdemo;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ListView;
import com.example.jreduch7292.R;
import com.example.jreduch7292.adapter.MyListAdapter;
import com.example.jreduch7292.entity.News;
import java.util.ArrayList;
import java.util.List;
public class List3Activity extends AppCompatActivity {
private ListView lv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list3);
lv=(ListView)findViewById(R.id.lv);
List list=new ArrayList();
News ns=new News("新闻1","刚刚","n001",R.mipmap.a,"人民网");
list.add(ns);
ns=new News("新闻2","1小时前","n002",R.mipmap.b,"新浪网");
list.add(ns);
ns=new News("新闻3","刚刚","n003",R.mipmap.c,"搜狐网");
list.add(ns);
ns=new News("新闻4","刚刚","n004",R.mipmap.d,"谷歌网");
list.add(ns);
ns=new News("新闻5","1小时前","n005",R.mipmap.e,"新浪网");
list.add(ns);
ns=new News("新闻6","3小时前","n006",R.mipmap.f,"百度网");
list.add(ns);
ns=new News("新闻7","刚刚","n007",R.mipmap.g,"新浪网");
list.add(ns);
ns=new News("新闻8","1小时前","n008",R.mipmap.h,"新浪网");
list.add(ns);
ns=new News("新闻9","刚刚","n009",R.mipmap.zyf,"天涯网");
list.add(ns);
ns=new News("新闻10","5小时前","n0010",R.mipmap.zyfzyf,"新浪网");
list.add(ns);
ns=new News("新闻1","刚刚","n001",R.mipmap.a,"人民网");
list.add(ns);
ns=new News("新闻2","1小时前","n002",R.mipmap.b,"新浪网");
list.add(ns);
ns=new News("新闻3","刚刚","n003",R.mipmap.c,"搜狐网");
list.add(ns);
lv.setAdapter(new MyListAdapter(this,list));
}
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.jreduch7292.listdemo.List3Activity">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/lv"
>
</ListView>
</RelativeLayout>
1.News2代码
package com.example.jreduch7292.entity;
/**
* Created by 冲天之峰 on 2016/8/3.
*/
public class News2 {
private String title;
private String pubDate;
private String newId;
private int img1;
private int img2;
private int img3;
private String from;
private String pinglun;
private String jian;
private String x;
// private int goodCount;
public News2( String jian, String x, String pinglun, String from, int img3, int img2, int img1, String newId, String pubDate, String title) {
this.jian = jian;
this.x = x;
this.pinglun = pinglun;
this.from = from;
this.img3 = img3;
this.img2 = img2;
this.img1 = img1;
this.newId = newId;
this.pubDate = pubDate;
this.title = title;
}
public String getX() {
return x;
}
public void setX(String x) {
this.x = x;
}
public String getJian() {
return jian;
}
public void setJian(String jian) {
this.jian = jian;
}
public String getPinglun() {
return pinglun;
}
public void setPinglun(String pinglun) {
this.pinglun = pinglun;
}
public String getFrom() {
return from;
}
public void setFrom(String from) {
this.from = from;
}
public int getImg3() {
return img3;
}
public void setImg3(int img3) {
this.img3 = img3;
}
public int getImg2() {
return img2;
}
public void setImg2(int img2) {
this.img2 = img2;
}
public int getImg1() {
return img1;
}
public void setImg1(int img1) {
this.img1 = img1;
}
public String getNewId() {
return newId;
}
public void setNewId(String newId) {
this.newId = newId;
}
public String getPubDate() {
return pubDate;
}
public void setPubDate(String pubDate) {
this.pubDate = pubDate;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
}
2.MyList2Adapter代码
package com.example.jreduch7292.adapter;
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;
import android.widget.Toast;
import com.example.jreduch7292.R;
import com.example.jreduch7292.entity.News2;
import java.util.List;
/**
* Created by 冲天之峰 on 2016/8/3.
*/
public class MyList2Adapter extends BaseAdapter {
private List<News2> myData;
private Context context;
public MyList2Adapter( Context context,List<News2> myData){
this.context=context;
this.myData=myData;
}
@Override
public int getCount() {
return myData.size();
}
@Override
public Object getItem(int position) {
return myData.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder vh;
if(convertView==null){
vh=new ViewHolder();
convertView=LayoutInflater.from(context).inflate(R.layout.list2_base,null);
vh.title=(TextView)convertView.findViewById(R.id.title);
vh.pubDate=(TextView)convertView.findViewById(R.id.time);
vh.from=(TextView) convertView.findViewById(R.id.from);
vh.pinglun=(TextView) convertView.findViewById(R.id.pinglun);
vh.jian=(TextView) convertView.findViewById(R.id.jian);
vh.x=(TextView) convertView.findViewById(R.id.x);
vh.img1=(ImageView)convertView.findViewById(R.id.img1);
vh.img2=(ImageView)convertView.findViewById(R.id.img2);
vh.img3=(ImageView)convertView.findViewById(R.id.img3);
convertView.setTag(vh);
}else{
vh= (ViewHolder)convertView.getTag();
}
vh.img1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context,"点击了图片"+position,Toast.LENGTH_SHORT).show();
}
});
final News2 ns=myData.get(position);
vh.jian.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context,"点击了评论+1",Toast.LENGTH_SHORT).show();
int count=Integer.parseInt(vh.pinglun.getText().toString())+1;
vh.pinglun.setText(count+"");
// vh.pinglun.setTextColor(0xffcc0000);
ns.setPinglun(String.valueOf(count));
}
});
// News2 ns= myData.get(position);
vh.title.setText(ns.getTitle());
vh. img1.setImageResource(ns.getImg1());
vh. img2.setImageResource(ns.getImg2());
vh. img3.setImageResource(ns.getImg3());
vh. jian.setText(ns.getJian());
vh. from.setText(ns.getFrom());
vh. pinglun.setText(ns.getPinglun());
vh. pubDate.setText(ns.getPubDate());
vh. x.setText(ns.getX());
// vh.goodCount.setText(ns.getGoodCount());
return convertView;
}
// View view= LayoutInflater.from(context).inflate(R.layout.list2_base,null);
// TextView title=(TextView) view.findViewById(R.id.title);
// TextView pubDate=(TextView) view.findViewById(R.id.time);
// TextView from=(TextView) view.findViewById(R.id.from);
// TextView pinglun=(TextView) view.findViewById(R.id.pinglun);
// TextView jian=(TextView) view.findViewById(R.id.jian);
// TextView x=(TextView) view.findViewById(R.id.x);
// ImageView img1=(ImageView)view.findViewById(R.id.img1);
// ImageView img2=(ImageView)view.findViewById(R.id.img2);
// ImageView img3=(ImageView)view.findViewById(R.id.img3);
//
// News2 news=myData.get(position);
// title.setText(news.getTitle());
// img1.setImageResource(news.getImg1());
// img2.setImageResource(news.getImg2());
// img3.setImageResource(news.getImg3());
// jian.setText(news.getJian());
// from.setText(news.getFrom());
// pinglun.setText(news.getPinglun());
// pubDate.setText(news.getPubDate());
// x.setText(news.getX());
public class ViewHolder{
TextView title;
ImageView img1;
TextView pubDate;
TextView from;
TextView pinglun;
TextView jian;
TextView x;
ImageView img2;
ImageView img3;
// TextView goodCount;
}
}
3(R.layout.list2_base,null);布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="我是标题"
android:gravity="center"
android:id="@+id/title"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_below="@+id/title"
android:id="@+id/ll1">
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:src="@mipmap/ic_launcher"
android:id="@+id/img1"
android:scaleType="centerCrop"
android:layout_weight="1"
/>
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:src="@mipmap/ic_launcher"
android:id="@+id/img2"
android:scaleType="centerCrop"
android:layout_weight="1"
/>
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:src="@mipmap/ic_launcher"
android:id="@+id/img3"
android:scaleType="centerCrop"
android:layout_weight="1"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:id="@+id/ll2"
android:layout_below="@+id/ll1"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="荐"
android:background="#0920f2"
android:gravity="center"
android:id="@+id/jian"
android:textSize="25sp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="未来网"
android:layout_marginLeft="10dp"
android:gravity="center"
android:id="@+id/from"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="评论291"
android:layout_marginLeft="80dp"
android:gravity="center"
android:id="@+id/pinglun"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="100dp"
android:text="今天"
android:gravity="center"
android:id="@+id/time"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="X"
android:background="#fd8f8686"
android:gravity="center"
android:textSize="25sp"
android:id="@+id/x"
/>
</LinearLayout>
</RelativeLayout>4.List2Activity代码
<pre name="code" class="java">package com.example.jreduch7292.listdemo;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ListView;
import com.example.jreduch7292.R;
import com.example.jreduch7292.adapter.MyList2Adapter;
import com.example.jreduch7292.entity.News2;
import java.util.ArrayList;
import java.util.List;
public class List2Activity extends AppCompatActivity {
private ListView lv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list2);
lv=(ListView)findViewById(R.id.lv);
List list=new ArrayList();
News2 ns=new News2("荐","X","21323","人民网",R.mipmap.a,R.mipmap.b,R.mipmap.c,"n001","刚刚","新闻1");
list.add(ns);
ns=new News2("荐","X","21323","人民网",R.mipmap.d,R.mipmap.e,R.mipmap.f,"n001","刚刚","新闻2");
list.add(ns);
ns=new News2("荐","X","21323","人民网",R.mipmap.a,R.mipmap.b,R.mipmap.c,"n001","刚刚","新闻3");
list.add(ns);
ns=new News2("荐","X","21323","人民网",R.mipmap.d,R.mipmap.e,R.mipmap.f,"n001","刚刚","新闻4");
list.add(ns);
ns=new News2("荐","X","21323","人民网",R.mipmap.a,R.mipmap.b,R.mipmap.c,"n001","刚刚","新闻5");
list.add(ns);
ns=new News2("荐","X","21323","人民网",R.mipmap.d,R.mipmap.e,R.mipmap.f,"n001","刚刚","新闻6");
list.add(ns);
lv.setAdapter(new MyList2Adapter(this,list));
}
}
5.ListView布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.jreduch7292.listdemo.List2Activity">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/lv"
android:dividerHeight="10dp"
></ListView>
</RelativeLayout>
作者：冲天之峰 20160803
标签：
原文地址：http://blog.csdn.net/zhangyufeng0126/article/details/52107335
