Question

我有一个小问题，我的微调器不会使应用程序崩溃，但同时不会在其中显示我的自定义适配器。我花了很多年没有试图找出问题所在，但我似乎仍然无法找到它，有人能发现我的错误吗？

我的适配器

public class AccomdationAdapter extends ArrayAdapter <String> {

Context c;
String[] roomType;
int[] images;





public AccomdationAdapter(Context ctx, String[] roomType, int[] images) {

    super(ctx, R.layout.custom_room_spinner);
    this.c=ctx;
    this.roomType=roomType;
    this.images=images;






}

@Override
public View getDropDownView(int position, View convertView, ViewGroup parent) {


    if(convertView==null){


        LayoutInflater inflater = (LayoutInflater)c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.custom_room_spinner,null);


    }

    TextView roomTypes = (TextView) convertView.findViewById(R.id.txtRoom);
    ImageView roomIcon = (ImageView) convertView.findViewById(R.id.imgRoom);

    //set data
    roomTypes.setText(roomType[position]);
    roomIcon.setImageResource(images[position]);

    return convertView;

}


@Override
public View getView(int position, View convertView, ViewGroup parent) {
    if(convertView==null){


        LayoutInflater inflater = (LayoutInflater)c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.custom_room_spinner,null);


    }

    TextView roomTypes = (TextView) convertView.findViewById(R.id.txtRoom);
    ImageView roomIcon = (ImageView) convertView.findViewById(R.id.imgRoom);

    //set data
    roomTypes.setText(roomType[position]);
    roomIcon.setImageResource(images[position]);

    return convertView;

}


}

主要活动

Spinner roomTypeSpinner;

String[]roomType = {"Single", "Double"};
int[] roomimages = {R.drawable.ic_menu_camera, R.drawable.ic_menu_gallery};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);



    roomTypeSpinner = (Spinner) findViewById(R.id.spinner);


    AccomdationAdapter adapter = new AccomdationAdapter(this, roomType, roomimages);
    roomTypeSpinner.setAdapter(adapter);

自定义房间微调器xml

    <ImageView
    android:layout_width="50dp"
    android:layout_height="50dp"
    android:id="@+id/imgRoom"
    android:background="@drawable/abc_ic_star_black_16dp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:text="Medium Text"
    android:id="@+id/txtRoom"
    android:layout_alignParentTop="true"
    android:layout_toEndOf="@+id/imgRoom"
    android:textSize="50dp" />
  </RelativeLayout>

内容主要

<Spinner
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/spinner" />

Answer 1

您的适配器已经有方法，只需添加getCount一个：

public class AccomdationAdapter extends ArrayAdapter <String> {
  Context c;
  String[] roomType;
  int[] images;
  @Override
  public int getCount() {
    return (roomType == null ? 0 : roomType.length);
  }

Answer 2

在自定义arrayAdapter中，您应该传递项目列表以填充到构造函数 super 实现。这样做：

public AccomdationAdapter(Context ctx, String[] roomType, int[] images) {

super(ctx, R.layout.custom_room_spinner,roomType);
this.c=ctx;
this.roomType=roomType;
this.images=images; }

Android自定义微调器适配器不显示内容

2 个答案: