Spinner选择框应用

FormActivity.java

package com.example.a20200712;import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.Spinner;import androidx.annotation.Nullable;import androidx.appcompat.app.AppCompatActivity;import java.util.Arrays;import java.util.List;public class FormActivity extends AppCompatActivity {    private Spinner spinner;    private ArrayAdapter arrayAdapter;    private List list = Arrays.asList(new String[]{"请选择","张三","王五","AAA","BBB","CCC","DDD","EEE","FFF","GGG"});    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.form_layout);        spinner = findViewById(R.id.form_layout_simpleSelect);        arrayAdapter = new ArrayAdapter(this,android.R.layout.simple_spinner_item,list);        spinner.setAdapter(arrayAdapter);    }}

form_layout.xml

<?xml version="1.0" encoding="utf-8"?>

风格

android.R.layout.simple_spinner_dropdown_item

android.R.layout.simple_spinner_item

android.R.layout.simple_list_item_1

R.layout.support_simple_spinner_dropdown_item

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