Android的Listview用法总结和Adapter的使用

在Android中Listview太常用了，不多说。直接说怎么用，代码如下：
一、第一种简单实现
MainActivity.java

import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.ListView;import android.app.Activity;public class MainActivity extends Activity {    private static String[] titles={"1","2","3","4","5","6"};    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ListView lv = (ListView)findViewById(R.id.lsv);        lv.setAdapter(new ArrayAdapter(this, R.layout.list_item,R.id.text,titles));    }}

这里有俩个布局文件，一个是整体的布局文件activity_main.xml，另一个是Listview中每条的样式的布局文件list_item.xml.
activity_main.xml

<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"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" ><ListView     android:id="@+id/lsv"     android:layout_width="match_parent"     android:layout_height="match_parent"    >ListView>RelativeLayout>

list_item.xml

"http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >"@+id/text"     android:layout_width="match_parent"     android:layout_height="match_parent"    /></LinearLayout>

部署显示ok。
二、第二种简单实现，和第一种差不多。SimpleAdapter中可以适配文本和图片，代码如下：
MainActivity.java

import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.app.Activity;import android.os.Bundle;import android.widget.ListView;import android.widget.SimpleAdapter;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ListView lv = (ListView)findViewById(R.id.lsv);        List> data = new ArrayList>();        for(int i=0;i<5;i++){            Map map = new HashMap();            map.put("id", i);            map.put("title", "+++++++++++++"+i);            data.add(map);        }        lv.setAdapter(new SimpleAdapter(this, data, R.layout.list_item, new String[]{"id","title"}, new int[]{R.id.text,R.id.title}));    }}

用到的布局文件
activity_main.xml

<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"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" ><ListView     android:id="@+id/lsv"     android:layout_width="match_parent"     android:layout_height="match_parent"    >ListView>RelativeLayout>

list_item.xml

<LinearLayout 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"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity"     android:orientation="horizontal"><TextView     android:id="@+id/text"     android:layout_width="wrap_content"     android:layout_height="wrap_content"    /><TextView     android:id="@+id/title"     android:layout_width="wrap_content"     android:layout_height="wrap_content"    />LinearLayout>

三、自定义Adapter类继承BaseAdapter，java代码如下：

import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ListView;import android.widget.TextView;public class MainActivity extends Activity {    List> data;    ListView lv;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lv = (ListView)findViewById(R.id.lsv);        data = new ArrayList>();        for(int i=0;i<5;i++){            Map map = new HashMap();            map.put("id", i);            map.put("title", "+++++++++++++"+i);            data.add(map);        }        lv.setAdapter(new MyAdapter());    }    private class MyAdapter extends BaseAdapter{        @Override        public int getCount() {//list里面总共的条目            // TODO Auto-generated method stub            return data.size();        }        @Override        public Object getItem(int position) {            // TODO Auto-generated method stub            return null;        }        @Override        public long getItemId(int position) {            // TODO Auto-generated method stub            return 0;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {//实现显示每条数据            // TODO Auto-generated method stub            Map map = data.get(position);            View view = View.inflate(MainActivity.this, R.layout.list_item, null);            ((TextView)view.findViewById(R.id.text)).setText(map.get("id")+"");            ((TextView)view.findViewById(R.id.title)).setText(map.get("title")+"");            return view;        }    }}

布局文件和上面一样。运行OK

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