看到答案与轻量级和高可定制的库:

https://stackoverflow.com/a/73085435/6694920

<com.innowisegroup.hintedspinner.HintedSpinner
android:id="@+id/hintedSpinner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="20dp"
app:hintTextSize="24sp"
app:hintTextColor="@color/red"
app:hint="Custom hint"
app:withDivider="true"
app:dividerColor="@color/dark_green"
app:arrowDrawable="@drawable/example_arrow_4"
app:arrowTint="@color/colorAccent"
app:popupBackground="@color/light_blue"
app:items="@array/text" />

倒塌的微调器:

扩大转轮:

When extending SpinnerAdapter, you override two View-producing methods, getView(int, View, ViewGroup) and getDropDownView(int, View, ViewGroup). The first one supplies the View inserted into the Spinner itself; the second supplies the View in the drop-down list (as the name suggests). You can override the getView(...) so that, until an item has been selected, it displays a TextView containing a prompt; then, when you detect an item has been selected, you change it to display a TextView corresponding to that.

public class PromptingAdapter extends SpinnerAdapter {

    //... various code ...

    private boolean selectionmade = false;

    //call this method from the OnItemSelectedListener for your Spinner
    public setSelectionState(boolean b) {
        selectionmade = b;
    }

    @Override
    public View getView(int position, View recycle, ViewGroup container) {
        if(selectionmade) {
            //your existing code to supply a View for the Spinner
            //you could even put "return getDropDownView(position, recycle, container);"
        }
        else {
            View output;
            if(recycle instanceof TextView) {
                 output = recycle;
            }
            else {
                 output = new TextView();
                 //and layout stuff
            }
            output.setText(R.string.please_select_one);
            //put a string "please_select_one" in res/values/strings.xml
            return output;
        }
    }

//...
}

我最终使用了Button。虽然Button不是旋转器，但其行为很容易自定义。

首先像往常一样创建适配器:

String[] items = new String[] {"One", "Two", "Three"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
        android.R.layout.simple_spinner_dropdown_item, items);

注意，我使用simple_spinner_dropdown_item作为布局id。这将有助于创建一个更好的外观时，创建警报对话框。

在onClick处理我的按钮，我有:

public void onClick(View w) {
  new AlertDialog.Builder(this)
  .setTitle("the prompt")
  .setAdapter(adapter, new DialogInterface.OnClickListener() {

    @Override
    public void onClick(DialogInterface dialog, int which) {

      // TODO: user specific action

      dialog.dismiss();
    }
  }).create().show();
}

就是这样!

你可以把它变成一个文本视图，并使用这个:

android:style="@android:style/Widget.DeviceDefault.Light.Spinner"

然后定义android:text属性。

我通过使用按钮而不是旋转器来处理这个问题。我在GitHub上有样本项目。

在项目中，我同时显示旋转器和按钮，以显示它们确实看起来相同。除了按钮，你可以将初始文本设置为任何你想要的。

下面是活动的样子:

package com.stevebergamini.spinnerbutton;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Spinner;

public class MainActivity extends Activity {

    Spinner spinner1;
    Button button1;
    AlertDialog ad;
    String[] countries;

    int selected = -1;

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

        spinner1 = (Spinner) findViewById(R.id.spinner1);
        button1 = (Button) findViewById(R.id.button1);

        countries = getResources().getStringArray(R.array.country_names);

        //  You can also use an adapter for the allert dialog if you'd like
        //  ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, countries);        

        ad = new AlertDialog.Builder(MainActivity.this).setSingleChoiceItems(countries, selected,  
                new  DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            button1.setText(countries[which]);
                            selected = which;
                            ad.dismiss();

                        }}).setTitle(R.string.select_country).create(); 


        button1.setOnClickListener( new OnClickListener(){

            @Override
            public void onClick(View v) {
                ad.getListView().setSelection(selected);
                ad.show();              
            }});

    }

}

注意:是的，我意识到这是依赖于应用的主题和外观将略有不同，如果使用Theme. holo。但是，如果您使用的是遗留主题之一，如Theme。黑色，你可以开始了。

对我来说，它是这样工作的。有改进，只改变文本在某些选项，而不是全部。

首先，我采用旋转器的名称并创建带有自定义视图的arrayadapter，但现在这并不重要，关键是覆盖getView，并在内部更改你需要更改的值。在我的情况下只有第一个，其余的我离开原来的

public void rellenarSpinnerCompeticiones(){
        spinnerArrayCompeticiones = new ArrayList<String>();
        for(Competicion c: ((Controlador)getApplication()).getCompeticiones()){
            spinnerArrayCompeticiones.add(c.getNombre());
        }
        //ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this,R.layout.spinner_item_competicion,spinnerArrayCompeticiones);
        ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this, R.layout.spinner_item_competicion, spinnerArrayCompeticiones){
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                final View v = vi.inflate(R.layout.spinner_item_competicion, null);
                final TextView t = (TextView)v.findViewById(R.id.tvCompeticion);
                if(spinnerCompeticion.getSelectedItemPosition()>0){
                    t.setText(spinnerArrayCompeticiones.get(spinnerCompeticion.getSelectedItemPosition()));
                }else{
                    t.setText("Competiciones");
                }
                return v;
            }
        };
        spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinnerCompeticion.setAdapter(spinnerArrayAdapter);
    }