初识Adapter

首先得了解Adapter层级关系：

示例，将user对象适配到textview

public class User {

    private String userName;
    private String userAddress;

    public User(String name, String address) {
        // TODO Auto-generated constructor stub

        userAddress = address;
        userName = name;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getUserAddress() {
        return userAddress;
    }

    public void setUserAddress(String userAddress) {
        this.userAddress = userAddress;
    }

}

为user对象定制UserAdapter，并实现BaseAdapter抽象方法

public class UserAdapter extends BaseAdapter {

    List<User> mUsers;

    Context mContext;

    public UserAdapter(Context context, List<User> users) {

        mContext = context;
        mUsers = users;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return mUsers.size();
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return mUsers.get(position);
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        
        convertView = LayoutInflater.from(mContext).inflate(R.layout.user_item, null);
        TextView textView1 = (TextView) convertView.findViewById(R.id.textView1);
        TextView textView2 = (TextView) convertView.findViewById(R.id.textView2);
        textView1.setText(mUsers.get(position).getUserName());
        textView2.setText(mUsers.get(position).getUserAddress());
        
        return convertView;
    }

}

在主activity里调用适配器,注意，onClickListener对Spinner不适用，调用会报错

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_form);

        // showSpinner();
        showUserSpinner();
    }

    public void showUserSpinner() {
        Spinner spinner = (Spinner) findViewById(R.id.spinner3);
        ArrayList<User> users = new ArrayList<User>();
        users.add(new User("Jewelinsie", "重庆"));
        users.add(new User("Chung Shurecy", "内江"));

        UserAdapter userAdapter = new UserAdapter(this, users);
16         spinner.setAdapter(userAdapter);
        
        spinner.setOnItemSelectedListener(new OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> parent, View view,
                    int position, long id) {
                // TODO Auto-generated method stub
                TextView textView2 = (TextView)view.findViewById(R.id.textView2);
                Log.i(TAG, "address is "+textView2.getText().toString());
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
                // TODO Auto-generated method stub
                
            }
        });

    }

Layout配置如下：

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
          android:layout_margin="10dp"
          android:drawableLeft="@drawable/p16"
        />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
         android:layout_margin="10dp"
        />

 实现效果，样式图片虽然丑了点，但是在功能上是成功的。