Customize the TintSpinner style and tintspinner Style

Customize the TintSpinner style and tintspinner Style

First, why should we use TintSpinner instead of a Spinner?

See several compatibility issues when using AppCompat_v7 21.0.0d

Then, the effect we want to customize is

That is to say, the selected style is white text, and the drop-down style is black text. Such a small need also requires skill.

First, the TintSpinner adapter needs to use the ArrayAdapter instead of the BaseAdapter. The previous detour was to use the BaseAdapter and then find

adapter.setDropDownViewResource(R.layout.drop_down_item);

Method, the result is obviously easy to see, BaseAdapter does not have this method, why?

BaseAdapter implements the ListAdapter and SpinnerAdapter interfaces:

Public abstract class BaseAdapter implements ListAdapter, SpinnerAdapter

The ArrayAdapter is a subclass of BaseAdapter.

Public class ArrayAdapter <T> extends BaseAdapter implements Filterable

Therefore, the setDropDownViewResource method cannot be found.

The problem is solved. Let's see how to implement this adapter:

Model is

public class EndemicArea {    @JsonField("description")    private String description;    @JsonField("name")    private String name;    @JsonField("pk")    private int pk;    public EndemicArea(String description, String name, int pk) {        this.description = description;        this.name = name;        this.pk = pk;    }    public String getDescription() {        return description;    }    public void setDescription(String description) {        this.description = description;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getPk() {        return pk;    }    public void setPk(int pk) {        this.pk = pk;    }}

Adapter:

public class EndemicAreaSpinnerAdapter extends ArrayAdapter<EndemicArea> {    private LayoutInflater layoutInflater;    public EndemicAreaSpinnerAdapter(Context context, int resource, List<EndemicArea> endemicAreaList) {        super(context, resource, endemicAreaList);        layoutInflater = LayoutInflater.from(context);    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        View view = layoutInflater.inflate(R.layout.choose_bed_item, null);        TextView areaName = (TextView) view.findViewById(R.id.choose_bed_item_name);        areaName.setText(getItem(position).getName());        return view;    }    @Override    public View getDropDownView(int position, View convertView, ViewGroup parent) {        View view = layoutInflater.inflate(android.R.layout.simple_spinner_dropdown_item, parent, false);        CheckedTextView areaName = (CheckedTextView) view.findViewById(android.R.id.text1);        areaName.setText(getItem(position).getName());        return view;    }}

Choose_bed_item.xml is

<?xml version="1.0" encoding="utf-8"?><TextView xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/choose_bed_item_name"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:layout_margin="4dp"    android:gravity="center"    android:paddingBottom="10dp"    android:layout_marginRight="8dp"    android:paddingTop="10dp"    android:textColor="@color/white"    android:textSize="20sp"></TextView>

Finally:

 tintSpinner = new TintSpinner(getActivity());        tintSpinner.setBackgroundResource(R.drawable.abc_spinner_mtrl_am_alpha);        tintSpinner.setAdapter(spinnerAdapter);

Note: TintSpinner is used to import android. support. v7.internal. widget. TintSpinner;

It seems that the Spinner needs ArrayAdapter to customize the drop-down style, and then it can be completely customized.