学习Android自定义Spinner适配器

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content" android:layout_height="wrap_content"
  android:orientation="horizontal">

  <RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="10dp">

    <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="New Text"
      android:id="@+id/car_brand_name"
      android:layout_gravity="left"
      android:layout_alignParentLeft="true"
      android:layout_marginTop="5dp"
      android:layout_marginBottom="5dp" />

    <ImageView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:id="@+id/car_brand_flag"
      android:layout_gravity="right"
      android:layout_alignParentRight="true" />
  </RelativeLayout>
</LinearLayout>

ArrayAdapter carBrandAdapter=new ArrayAdapter<String>
(
  AddCarActivity.this,
  android.R.layout.simple_spinner_dropdown_item,
  carBrandNameList//是String[],就是所有要显示的brandName
){
  @Override
  public View getDropDownView(int position, View convertView, ViewGroup parent) {
  convertView = View.inflate(AddCarActivity.this,R.layout.car_brand_spinner,null);//获得Spinner布局View
  if(convertView!=null)
  {
    TextView carBrandNameView = (TextView)convertView.findViewById(R.id.car_brand_name);
    ImageView carBrandFlagView = (ImageView)convertView.findViewById(R.id.car_brand_flag);
    try
    {
      JSONObject json = new JSONObject(carBrandList.get(position).get("carBrand").toString());
      carBrandNameView.setText(json.getString("carBrandName"));//设置数据,我这里的数据是从服务器读出来的，所以前面有一个转化取值的过程
      }catch (Exception e){}
      Bitmap bitmap =Common.String2Bitmap(carBrandList.get(position).get("carBrandFlagContent").toString());//这里也一样，图片数据来自于服务器，同时有一个将数据从String转Bitmap的过程
      if(bitmap!=null)
      carBrandFlagView.setImageBitmap(bitmap);//显示图片
      }
      return convertView;
      }
};
//给Spinner set适配器
Spinner carBrandSpinner=(Spinner)findViewById(R.id.carBrandSpinner);
carBrandSpinner.setAdapter(carBrandAdapter);
carBrandSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
{
   @Override//重写Item被选择的事件
   public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {}
   @Override
   public void onNothingSelected(AdapterView<?> parent) {}
});