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) {}});