ListView是Android中最经常使用的控件之中的一个，也是最难用的控件。

ListView的作用是展示大量的数据，只是ListView并非直接和数据打交道。而是通过适配器作为中间桥梁。

1.首先在layout中建立ListView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" >

    <ListView

        android:id="@+id/list_view"

        android:layout_width="match_parent"

        android:layout_height="match_parent" >

    </ListView>

</LinearLayout>

2.然后。建立ListView的子项布局

<?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" >

    <ImageView

        android:id="@+id/num_image"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" />

    <TextView

        android:id="@+id/num_name"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:layout_marginLeft="10dip" />

</LinearLayout>

3.接着定义一个实体类， 作为 ListView 适配器的适配类型

public class Number {

    private String name;

    private int imageId;

    public Number(String name, int imageId) {

        this.name = name;

        this.imageId = imageId;

    }

    public String getName() {

        return name;

    }

    public int getImageId() {

        return imageId;

    }

}

4.建立适配器

public class NumberAdapter extends ArrayAdapter<Number> {

    private int rsId;

    public NumberAdapter(Context context, int itemid, List<Number> Numlist) {

        super(context, itemid, Numlist);

        rsId = itemid;

    }

    @Override

    public View getView(int position, View convertView, ViewGroup parent) {

        // TODO Auto-generated method stub

        Number num = getItem(position);

        View view;

        ViewHolder viewHolder;//建立一个类保存ImageView和TextView的实例，不用每次都又一次生成实例

        if (convertView == null) {

            view = LayoutInflater.from(getContext()).inflate(rsId, null);

            viewHolder = new ViewHolder();

            viewHolder.image = (ImageView) view.findViewById(R.id.num_image);

            viewHolder.name = (TextView) view.findViewById(R.id.num_name);

            view.setTag(viewHolder);

        } else {

            view = convertView;

            viewHolder = (ViewHolder) view.getTag();

        }

        viewHolder.image.setImageResource(num.getImageId());

        viewHolder.name.setText(num.getName());

        return view;

    }

    class ViewHolder {

        ImageView image;

        TextView name;

    }

}

5.活动的代码

public class MainActivity extends ActionBarActivity {

    private List<Number> numlist = new ArrayList<Number>();

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.list_layout);

        initNumber();

        NumberAdapter adapter = new NumberAdapter(MainActivity.this,

                R.layout.item, numlist);

        ListView list = (ListView) findViewById(R.id.list_view);

        list.setAdapter(adapter);

        list.setOnItemClickListener(new OnItemClickListener() {

            @Override

            public void onItemClick(AdapterView<?> parent, View view,

            int position, long id) {

            Number num = numlist.get(position);

            Toast.makeText(MainActivity.this, num.getName(),

            Toast.LENGTH_SHORT).show();

            }

            });

    }

    private void initNumber() {

        Number n1 = new Number("n1", R.drawable.n1);

        numlist.add(n1);

        Number n2 = new Number("n2", R.drawable.n2);

        numlist.add(n2);

        Number n3 = new Number("n3", R.drawable.n3);

        numlist.add(n3);

        Number n4 = new Number("n4", R.drawable.n4);

        numlist.add(n4);

        Number n5 = new Number("n5", R.drawable.n5);

        numlist.add(n5);

        Number n6 = new Number("n6", R.drawable.n6);

        numlist.add(n6);

        Number n7 = new Number("n7", R.drawable.n7);

        numlist.add(n7);

        Number n8 = new Number("n8", R.drawable.n8);

        numlist.add(n8);

        Number n9 = new Number("n9", R.drawable.n9);

        numlist.add(n9);

        Number n10 = new Number("n10", R.drawable.n10);

        numlist.add(n10);

             }

    }

6.最后实现的截图