ListView实例

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ListView算是比较简单又比较难的控件了，不会的时候感觉真复杂，真麻烦，学会了一个就发现其实都挺简单的。
1、要有个ListView；
2、新建个Adp类去继承BaseAdapter；
3、绑定适配器；
4、在Adp中选择根据不同的需求加载不同的Item元素；

MainActivity.xml文件

<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:background="#FFF"    android:padding="20dp" >    <ListView        android:id="@+id/list"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:background="@drawable/list"        android:dividerHeight="1dp"        android:divider="@color/dvd" /></RelativeLayout>

MainActivity.java文件

package com.gino.listviewtest;import android.os.Bundle;import android.app.Activity;import android.widget.ListView;public class MainActivity extends Activity {    ListView list;    Adp adp;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        list = (ListView) findViewById(R.id.list);        adp  = new Adp(this);        list.setAdapter(adp);    }}

Adp.java文件

package com.gino.listviewtest;import android.content.Context;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;@SuppressWarnings("unused")public class Adp extends BaseAdapter {    LayoutInflater inf;    String[] text = { "AAAAAAA", "BBBBBBB", "CCCCCCC", "DDDDDDD", "EEEEEEE",            "FFFFFFF", "GGGGGGG" };    public Adp(Context context) {        inf = LayoutInflater.from(context);    }    @Override    public int getCount() {        return 7;    }    @Override    public int getViewTypeCount() {        return 2;    }    @Override    public int getItemViewType(int pos) {        return pos < 3 ? 1 : 0;    }    @Override    public Object getItem(int arg0) {        return arg0;    }    @Override    public long getItemId(int arg0) {        return arg0;    }    @Override    public View getView(int pos, View item, ViewGroup list) {        ViewHolder holder;        if (item != null) {            holder = (ViewHolder) item.getTag();        } else {            holder = new ViewHolder();            item = inf.inflate(getItemViewType(pos) == 1 ? R.layout.item1                    : R.layout.item2, null);            holder.go = item.findViewById(R.id.go);            holder.on = item.findViewById(R.id.on);            holder.text = item.findViewById(R.id.text);            item.setTag(holder);            Log.e("get new item", "position: " + pos);        }        ((TextView) holder.text).setText("position: " + pos);        return item;    }    private class ViewHolder {        View go, on, text;    }}

ListView—Item1.xml文件

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="48dp"    android:background="@drawable/item" >    <TextView        android:id="@+id/text"        android:layout_width="wrap_content"        android:layout_height="48dp"        android:gravity="center"        android:padding="3dp"        android:textColor="#000" />    <ToggleButton        android:id="@+id/on"        android:layout_width="60dp"        android:layout_height="36dp"        android:layout_alignParentRight="true"        android:layout_centerVertical="true"/></RelativeLayout>

ListView—Item2.xml文件

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="48dp"    android:background="@drawable/item" >    <TextView        android:id="@+id/text"        android:layout_width="wrap_content"        android:layout_height="48dp"        android:gravity="center_vertical"        android:padding="3dp"        android:text="item content"        android:textColor="#000" />    <ImageView        android:id="@+id/go"        android:layout_width="36dp"        android:layout_height="36dp"        android:layout_alignParentRight="true"        android:layout_centerVertical="true"        android:scaleType="centerCrop"        android:src="@drawable/ic_launcher" /></RelativeLayout>

禁止以任何形式的转载

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