Android-Spinner [使用C# And java实现]

效果如下：

C#实现代码

using Android.App;using Android.OS;using Android.Widget;namespace SpinnerDemo{    [Activity(Label = "@string/applicationName", MainLauncher = true, Icon = "@drawable/icon")]    public class MainActivity : Activity    {        PRivate Spinner _citySpinner;        private TextView _cityNameView;        private ArrayAdapter<string> _cityInfos;              protected override void OnCreate(Bundle bundle)        {            base.OnCreate(bundle);            SetContentView(Resource.Layout.Main);            _citySpinner = FindViewById<Spinner>(Resource.Id.sp_city);            _cityNameView = FindViewById<TextView>(Resource.Id.txt_cityName);            _cityInfos = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleSpinnerDropDownItem);            _cityInfos.Add("成都");            _cityInfos.Add("兰州");            _cityInfos.Add("武汉");            _cityInfos.Add("上海");            _citySpinner.Adapter = _cityInfos;            _citySpinner.ItemSelected += CitySelectedEvent;        }        private void CitySelectedEvent(object sender, AdapterView.ItemSelectedEventArgs e)        {            _cityNameView.Text = _cityInfos.GetItem(e.Position);        }    }}

Java实现代码

package com.example.halower.spinnerdemo;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.TextView;public class MainActivity extends ActionBarActivity {    private Spinner _citySpinner;    private TextView _cityNameView;    private ArrayAdapter<String> _cityInfo;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        _citySpinner =(Spinner)findViewById(R.id.sp_city);        _cityNameView =(TextView) findViewById(R.id.txt_cityName);        _cityInfo =new ArrayAdapter<>(this,R.layout.support_simple_spinner_dropdown_item);        _cityInfo.add("成都");        _cityInfo.add("兰州");        _cityInfo.add("武汉");        _cityInfo.add("上海");        _citySpinner.setAdapter(_cityInfo);        _citySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {                _cityNameView.setText(_cityInfo.getItem(position));            }            @Override            public void onNothingSelected(AdapterView<?> parent) {            }        });    }}

LayOut

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">    <Spinner        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/sp_city"        android:layout_alignParentTop="true"        android:layout_alignParentRight="true"        android:layout_alignParentEnd="true"        android:layout_toEndOf="@+id/txt_cityName"        android:layout_toRightOf="@+id/txt_cityName" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="城市"        android:id="@+id/txt_cityName"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true" /></RelativeLayout>