AdapterView(ListView)

AdapterView(Image View用int类型)

1.先创建一个实体类

    public class Fruit {    private String name;    //注意图片为int类型    private int imageId;    private String str;    public String getStr() {        return str;    }    public void setStr(String str) {        this.str = str;    }    public Fruit(String name, int imageId) {        this.name = name;        this.imageId = imageId;    }    public Fruit(String name, int imageId, String str) {        this.name = name;        this.imageId = imageId;        this.str = str;    }    public int getImageId() {        return imageId;    }    public void setImageId(int imageId) {        this.imageId = imageId;    }    public Fruit(String name) {        this.name = name;    }    public String getName() {        return name;    }

2.在创建布局

//为自定义布局文件    <?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"     >      <ImageView         android:id="@+id/fruit_image"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        />    <TextView         android:id="@+id/fruit_name"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:gravity="center"        android:layout_marginLeft="10dip" /></LinearLayout>

3.自定义适配器

    import java.util.ArrayList;import java.util.Collection;import java.util.List;import android.content.Context;import android.support.v4.widget.ViewDragHelper;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ArrayAdapter;import android.widget.ImageView;import android.widget.TextView;public class FruitAdapter extends ArrayAdapter<Fruit> {    private int resourcedId;    public FruitAdapter(Context context,int textViewResourceId,List<Fruit> objecs){        super(context,textViewResourceId,objecs);        resourcedId = textViewResourceId;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        View view;        Fruit fruit = getItem(position);        if(convertView == null){            view = LayoutInflater.from(getContext()).inflate(resourcedId, null);        }else{            view=convertView;        }        //得到自定义布局中的控件，为其赋值        ImageView fruitImage=(ImageView) view.findViewById(R.id.fruit_image);        TextView fruitView = (TextView) view.findViewById(R.id.fruit_name);        fruitImage.setImageResource(fruit.getImageId());        fruitView.setText(fruit.getName());        return view;    }}

优化

    public class FruitAdapter extends ArrayAdapter<Fruit> {    private int resourcedId;    public FruitAdapter(Context context,int textViewResourceId,List<Fruit> objecs){        super(context,textViewResourceId,objecs);        resourcedId = textViewResourceId;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        View view;        //ViewHolder viewHolder;        Fruit fruit = getItem(position);        if(convertView == null){            view = LayoutInflater.from(getContext()).inflate(resourcedId, null);            viewHolder = new ViewHolder();            viewHolder.fruitImage = (ImageView) view.findViewById(R.id.fruit_image);            viewHolder.fruitName = (TextView) view.findViewById(R.id.fruit_name);            view.setTag(viewHolder);        }else{            view=convertView;            viewHolder = (ViewHolder) view.getTag();        }        //得到自定义布局中的控件，为其赋值        viewHolder.fruitImage.setImageResource(fruit.getImageId());        viewHolder.fruitName.setText(Fruit.getName());        return view;    }    "重点"    //创建自己的缓存类    class ViewHolder{    ImageView fruitImage;    TextView fruitName;    }}   

4.主程序

    public class MainActivity extends Activity {    private List<Fruit> fruitList=new ArrayList<Fruit>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);        //main布局中只有listView,此博客中没有写这个布局        setContentView(R.layout.activity_main);        initFruits();        //传入的为自定义布局        FruitAdapter adapter = new FruitAdapter(MainActivity.this, R.layout.fruit_item, fruitList);        //得到布局中的listView控件        ListView listView = (ListView) findViewById(R.id.list_view);        listView.setAdapter(adapter);        //给每条添加点击事件，注意为Item点击事件        listView.setOnItemClickListener(new OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {            //用position得到每条记录                Fruit fruit = fruitList.get(position);                Toast.makeText(MainActivity.this, fruit.getStr(), Toast.LENGTH_SHORT).show();            }        });    }//初始化list中的数据    private void initFruits(){        Fruit apple =new Fruit("apple",R.drawable.a,"你好");        fruitList.add(apple);        Fruit banana = new Fruit("banana",R.drawable.e,"你好，你吃饱了没？");        fruitList.add(banana);        Fruit orange = new Fruit("orange",R.drawable.f,"你猜，我吃了没？");        fruitList.add(orange);        Fruit watermelon= new Fruit("watermelon",R.drawable.fg,"猜你妹啊，找打是吧！");        fruitList.add(watermelon);        Fruit pear=new Fruit("pear",R.drawable.g,"嗯哼，要动手");        fruitList.add(pear);        Fruit grape = new Fruit("grape",R.drawable.i1,"动手咋地");        fruitList.add(grape);        Fruit pineapple = new Fruit("pineapple",R.drawable.i2,"咋地，打残你");        fruitList.add(pineapple);        Fruit strawberry = new Fruit("strawberry",R.drawable.ic_launcher,"呦呦，好怕");        fruitList.add(strawberry);        Fruit cherry = new Fruit("Cherry",R.drawable.m,"怕就好");        fruitList.add(cherry);        Fruit mango= new Fruit("mango",R.drawable.r,"....");        fruitList.add(mango);        Fruit pineapple1 = new Fruit("pineapple1",R.drawable.v,"脑残");        fruitList.add(pineapple1);        Fruit strawberry1 = new Fruit("strawberry1",R.drawable.w,"脑残你妹");        fruitList.add(strawberry1);        Fruit cherry1 = new Fruit("Cherry1",R.drawable.ic_launcher,"....");        fruitList.add(cherry1);        Fruit mango1= new Fruit("mango1",R.drawable.ic_launcher,"咋地，打残你");        fruitList.add(mango1);    }}

5.使用

 setContentView(R.layout.list_layout);         init();         //只是使用一个list布局的框架        mListView_view = (ListView) findViewById(R.id.list_view);        SimpleAdapter adapter=new SimpleAdapter(this,list,R.layout.simple_layout,new String[]{"name","pass"},new int[]{R.id.name,R.id.pass});        mListView_view.setAdapter(adapter);

BaseAdapter

1.创建listView(list_view.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">    <ListView        android:id="@+id/list_view"        android:layout_width="wrap_content"        android:layout_height="wrap_content"/></LinearLayout>

2.创建要添加到list上的布局(student.xml)

单条student的布局

    <?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"><TextView    android:id="@+id/name"    android:layout_width="wrap_content"    android:layout_height="wrap_content" />    <TextView        android:id="@+id/sex"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:id="@+id/age"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>

创建Student类

    package com.test.dukang.baseview;//写出set()和get()方法public class Student {    private String age;    private String sex;    private String name;    public Student(String age, String sex, String name) {        this.age = age;        this.sex = sex;        this.name = name;    }    public String getSex() {        return sex;    }    public void setSex(String sex) {        this.sex = sex;    }    public String getAge() {        return age;    }    public void setAge(String age) {        this.age = age;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }}

4.创建StudentAdapter

    package com.test.dukang.baseview;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;import java.util.List;/** * Created by Administrator on 2015/8/24. */public class StudentAdapter extends BaseAdapter {    private List<Student> list;    private LayoutInflater inflater;    //通过构造器传入所需要传递的值    public StudentAdapter(List<Student> list, LayoutInflater inflater) {        this.list = list;        this.inflater = inflater;    }    @Override    public int getCount() {        return list.size();    }    @Override    public Object getItem(int position) {        return position;    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        //加载单个student的布局文件        View view=inflater.inflate(R.layout.student,null);        //得到单个student的指针        Student student=list.get(position);        //得到布局中的控件，注意用的view.find        TextView name= (TextView) view.findViewById(R.id.name);        TextView sex= (TextView) view.findViewById(R.id.sex);        TextView age= (TextView) view.findViewById(R.id.age);        //给控件设置相应的值        name.setText(student.getName());        sex.setText(student.getSex());        age.setText(student.getAge());        return view;    }}

5.创建主类（在主类中创建List）

    package com.test.dukang.baseview;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.widget.ListView;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private List<Student> list;    private LayoutInflater inflater;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        //注意加载list_view布局文件        setContentView(R.layout.list_view);        //初始化        init();      "得到布局填充，相当于上面的from(getContext()),用于得到上下文"        inflater=getLayoutInflater();        StudentAdapter adapter=new StudentAdapter(list,inflater);        //找到list_view        ListView listView=(ListView)findViewById(R.id.list_view);        listView.setAdapter(adapter);    }    public void init(){        //在使用类中创建list        list=new ArrayList<>();        Student xiaoming=new Student("18","男","小明");        Student xiaozhao=new Student("18","男","小LI");        Student xiaoli=new Student("18","男","小HONG");        list.add(xiaoming);        list.add(xiaozhao);        list.add(xiaoli);    }}

SimpleAdapter

        private ListView mListView_view;   //创建List对象    private List<HashMap<String,String>> list;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        "***导入只含有listView布局的xml文件***"        setContentView(R.layout.list_layout);         init();        //从布局文件中的到相应的控件id        mListView_view = (ListView) findViewById(R.id.list_view);        //这次导入的为自己定义的布局文件        final SimpleAdapter adapter=new SimpleAdapter(this,list,R.layout.simple_layout,new String[]{"name","pass"},new int[]{R.id.name,R.id.pass});        mListView_view.setAdapter(adapter);        mListView_view.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {            //得到其中的单条数据                HashMap<String,String> item=list.get(position);              Log.d("date"," "+item.get("name"));            }        });}//初始化public void init(){        "在主文件中创建List,然后为list添加对象"        list=new ArrayList<>();        HashMap<String,String> zhansan=creatHashmap("战三","123");        list.add(zhansan);        HashMap<String,String> lisi=creatHashmap("李四","123");        list.add( lisi);        HashMap<String,String> wangwu=creatHashmap("王五","123");        list.add(wangwu);        HashMap<String,String> zhaoliu=creatHashmap("赵六","123");        list.add(zhaoliu);    }               "因为传入的为hash表的形式" private  HashMap<String,String> creatHashmap (String name,String pass){        HashMap<String,String> zhansan =new HashMap<>();        zhansan.put("name",name);        zhansan.put("pass",pass);        return zhansan;    }