ListView简单使用

package com.example.simplelistviewdemo;


public class Animal {

    private String aName;

    private String aSpeak;

    private int aIcon;


    public Animal() {

    }


    public Animal(String aName, String aSpeak, int aIcon) {

        this.aName = aName;

        this.aSpeak = aSpeak;

        this.aIcon = aIcon;

    }


    public String getaName() {

        return aName;

    }


    public String getaSpeak() {

        return aSpeak;

    }


    public int getaIcon() {

        return aIcon;

    }


    public void setaName(String aName) {

        this.aName = aName;

    }


    public void setaSpeak(String aSpeak) {

        this.aSpeak = aSpeak;

    }


    public void setaIcon(int aIcon) {

        this.aIcon = aIcon;

    }

}

package com.example.simplelistviewdemo;


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 java.util.LinkedList;


public class AnimalAdapter extends BaseAdapter {


    private LinkedList mData;

    private Context mContext;


    public AnimalAdapter(LinkedList mData, Context mContext) {

        this.mData = mData;

        this.mCOntext= mContext;

    }


    @Override

    public int getCount() {

        return mData.size();

    }


    @Override

    public Object getItem(int position) {

        return null;

    }


    @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 = LayoutInflater.from(mContext).inflate(R.layout.item_list_animal,parent,false);

            holder = new ViewHolder();

            holder.img_icon = (ImageView) convertView.findViewById(R.id.img_icon);

            holder.txt_aName = (TextView) convertView.findViewById(R.id.txt_aName);

            holder.txt_aSpeak = (TextView) convertView.findViewById(R.id.txt_aSpeak);

            convertView.setTag(holder);   //将Holder存储到convertView中

        }else{

            holder = (ViewHolder) convertView.getTag();

        }

        holder.img_icon.setBackgroundResource(mData.get(position).getaIcon());

        holder.txt_aName.setText(mData.get(position).getaName());

        holder.txt_aSpeak.setText(mData.get(position).getaSpeak());

        return convertView;

    }


    static class ViewHolder{

        ImageView img_icon;

        TextView txt_aName;

        TextView txt_aSpeak;

    }

}

package com.example.simplelistviewdemo;


import android.content.Context;

import android.net.Uri;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.view.LayoutInflater;

import android.view.View;

import android.widget.AdapterView;

import android.widget.LinearLayout;

import android.widget.ListView;

import android.widget.Toast;



import java.util.LinkedList;

import java.util.List;


public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener{


    private List mData = null;

    private Context mContext;

    private AnimalAdapter mAdapter = null;

    private ListView list_animal;


    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        mContext = MainActivity.this;

        list_animal = (ListView) findViewById(R.id.list_animal);


        //动态加载顶部View和底部View

        final LayoutInflater inflater = LayoutInflater.from(this);

        View headView = inflater.inflate(R.layout.view_header, null, false);

        View footView = inflater.inflate(R.layout.view_footer, null, false);


        mData = new LinkedList();

        mData.add(new Animal("狗说", "你是狗么?", R.mipmap.ic_icon_dog));

        mData.add(new Animal("牛说", "你是牛么?", R.mipmap.ic_icon_cow));

        mData.add(new Animal("鸭说", "你是鸭么?", R.mipmap.ic_icon_duck));

        mData.add(new Animal("鱼说", "你是鱼么?", R.mipmap.ic_icon_fish));

        mData.add(new Animal("马说", "你是马么?", R.mipmap.ic_icon_horse));

        mAdapter = new AnimalAdapter((LinkedList) mData, mContext);


        //添加表头和表尾需要写在setAdapter方法调用之前！！！

        list_animal.addHeaderView(headView);

        list_animal.addFooterView(footView);


        list_animal.setAdapter(mAdapter);

        list_animal.setOnItemClickListener(this);

    }

    @Override

    public void onItemClick(AdapterView parent, View view, int position, long id) {

        Toast.makeText(mContext, "你点击了第" + position + "项", Toast.LENGTH_SHORT).show();

    }

}

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    tools:context="com.example.simplelistviewdemo.MainActivity">


    <TextView

        android:layout_width="match_parent"

        android:layout_height="48dp"

        android:textSize="18sp"

        android:text="动物的世界你们不懂"

        android:gravity="center"

        />

    <ListView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/list_animal"

        android:layout_gravity="center_horizontal" />

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="horizontal">


    

    <ImageView

        android:id="@+id/img_icon"

        android:layout_width="64dp"

        android:layout_height="64dp"

        android:baselineAlignBottom="true"

        android:paddingLeft="8dp" />


    

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:orientation="vertical">


        <TextView

            android:id="@+id/txt_aName"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:paddingLeft="8dp"

            android:textColor="#1D1D1C"

            android:textSize="20sp" />


        <TextView

            android:id="@+id/txt_aSpeak"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:paddingLeft="8px"

            android:textColor="#B4B4B9"

            android:textSize="14sp" />


    

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    android:gravity="center">

    <TextView

        android:layout_width="match_parent"

        android:layout_height="48dp"

        android:textSize="18sp"

        android:text="表头"

        android:gravity="center"

        android:background="#43BBEB"

        android:textColor="#FFFFFF"/>

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    android:gravity="center">

    <TextView

        android:layout_width="match_parent"

        android:layout_height="48dp"

        android:textSize="18sp"

        android:text="表尾"

        android:gravity="center"

        android:background="#43BBEB"

        android:textColor="#FFFFFF"/>