2.4.5 ListView简单实用

本节引言：

1.自定义BaseAdapter，然后绑定ListView的最简单例子

先看看我们要实现的效果图：

一个很简单的ListView，自己写下Item，然后加载点数据这样~ 下面贴下关键代码：

Animal.java:

/**
 * Created by Jay on 2015/9/18 0018.
 */
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;
    }
}

AnimalAdapter.java：自定义的BaseAdapter：

/**
 * Created by Jay on 2015/9/18 0018.
 */
public class AnimalAdapter extends BaseAdapter {

    private LinkedList<Animal> mData;
    private Context mContext;

    public AnimalAdapter(LinkedList<Animal> 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) {
        convertView = LayoutInflater.from(mContext).inflate(R.layout.item_list_animal,parent,false);
        ImageView img_icon = (ImageView) convertView.findViewById(R.id.img_icon);
        TextView txt_aName = (TextView) convertView.findViewById(R.id.txt_aName);
        TextView txt_aSpeak = (TextView) convertView.findViewById(R.id.txt_aSpeak);
        img_icon.setBackgroundResource(mData.get(position).getaIcon());
        txt_aName.setText(mData.get(position).getaName());
        txt_aSpeak.setText(mData.get(position).getaSpeak());
        return convertView;
    }
}

最后是MainActivity.java：

public class MainActivity extends AppCompatActivity {

    private List<Animal> 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);
        mData = new LinkedList<Animal>();
        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<Animal>) mData, mContext);
        list_animal.setAdapter(mAdapter);
    }

}

好的，自定义BaseAdapter以及完成数据绑定就是这么简单~
别问我拿示例的代码，刚开始学就会写出这些代码，我只是演示下流程，让大家熟悉 熟悉而已~另外，也是为下面的属性验证做准备~

2.表头表尾分割线的设置：

使用示例：

运行效果图：

代码实现：

先编写下表头与表尾的布局：

view_header.xml(表头),表尾一样，就不贴了：

<?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"
    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"/>
</LinearLayout>

MainActivty.java:

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener{

    private List<Animal> mData = null;
    private Context mContext;
    private AnimalAdapter mAdapter = null;
    private ListView list_animal;
    private LinearLayout ly_content;

    @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<Animal>();
        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<Animal>) 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();
    }
}

好的，代码还是比较简单的，从上面我们看出来一个要注意的问题，就是：

3.列表从底部开始显示：stackFromBottom

4.设置点击颜色cacheColorHint

5.隐藏滑动条

本节小结：