Android(安卓)Spinner

Spinner
Spinner 是从多个选项中选择一个选项的控件，类似于桌面程序中的组合框（ComboBox）
******** android:spinnerMode="dropdown" //制定模型下拉选项和对话框选项模式 android:entries="@array/week_en" //用于设置Spinner的显示内容属性值：要求传递的是一个资源字符串数组的id 布局文件： <RelativeLayoutxmlns: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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.kn_day05_1_spinner.MainActivity">

<TextViewandroid:id="@+id/textview1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"

android:textSize="28sp"
android:text="请选择星期："
/>
<Spinnerandroid:id="@+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"

android:layout_below="@+id/textview1"
android:layout_marginTop="30dp"
android:layout_marginLeft="20dp"
android:layout_marginStart="20dp"

android:spinnerMode="dropdown"
android:entries="@array/week_en"
/>
<Spinnerandroid:id="@+id/spinner2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"

android:layout_below="@+id/spinner1"
android:layout_marginTop="30dp"
android:layout_marginLeft="20dp"
android:layout_marginStart="20dp"

android:spinnerMode="dialog"
android:entries="@array/week_cn"

/>

</RelativeLayout>

@array/week_cn 对应的定义在 res/values/strings.xml中 <?xml version="1.0" encoding="utf-8"?> <resources> <string name="app_name">KN_Day05_1_Spinner</string> <string name="hello_world">Hello world!</string> <string name="action_settings">Settings</string>  <string-array name="week_en"> <item >Monday</item> <item >Tuesday</item> <item >Wednesday</item> <item >Thursday</item> <item >Friday</item> <item >Saturday</item> <item >Sunday</item> </string-array> <string-array name="week_cn"> <item >周一</item> <item >周二</item> <item >周三</item> <item >周四</item> <item >周五</item> <item >周六</item> <item >周日</item> </string-array> </resources>
*************************************** package com.example.kn_day05_1_spinner;
import java.util.ArrayList;
import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.ArrayAdapter; import android.widget.Spinner;
/** * 功能：在页面中添加2个spinner，实现省市联动效果 * 一个spinner中存储省份名字，一个spinner中存储城市名字， * 当某省份被选择后，第二个sipnner中对应显示该省份下的所有城市 * * ArrayAdapter 适配器的绑定使用 * @author KNOWN * */ public class MainActivity extends Activity {
Spinner sp1;//省 Spinner sp2;//市 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); sp1 = (Spinner)findViewById(R.id.spinner1); sp2 = (Spinner)findViewById(R.id.spinner2); ArrayList<String> provinceList= new ArrayList<String>(); provinceList.add("江苏"); provinceList.add("浙江"); //创建适配器 ArrayAdapter<String> provinceadapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, provinceList); //设置下拉样式为下拉 provinceadapter. setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item); sp1.setAdapter(provinceadapter); ArrayList<String> cityList1= new ArrayList<String>(); cityList1.add("南京市"); cityList1.add("苏州市"); cityList1.add("无锡市"); ArrayList<String> cityList2= new ArrayList<String>(); cityList2.add("杭州市"); cityList2.add("宁波市"); cityList2.add("绍兴市"); final ArrayAdapter<String> adapter1= new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, cityList1); final ArrayAdapter<String> adapter2= new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, cityList2); /** * 设置spinner子选项选中事件 */ sp1.s etOnItemSelectedListener(new OnItemSelectedListener() {
@Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { // TODO Auto-generated method stub / /id spinner子选项的序号从0开始 if(id == 0){ sp2.setAdapter(adapter1); }else if (id == 1) { sp2.setAdapter(adapter2); } Log.i("==当前选中的省是：", sp1.getSelectedItem().toString()); }
@Override public void onNothingSelected(AdapterView<?> parent) { // TODO Auto-generated method stub } }); sp2.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { // TODO Auto-generated method stub Log.i("==当前选中的市是：", sp2.getSelectedItem().toString()); }
@Override public void onNothingSelected(AdapterView<?> parent) { // TODO Auto-generated method stub } }); }
} ******************** 布局文件 activity_main.xml:
<RelativeLayoutxmlns: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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.kn_day05_1_spinner.MainActivity">

<TextViewandroid:id="@+id/textview1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:textSize="28sp"
android:text="请选择城市："
/>
<Spinnerandroid:id="@+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"

android:layout_below="@+id/textview1"
android:layout_marginTop="30dp"
android:layout_marginLeft="20dp"
android:layout_marginStart="20dp"

android:spinnerMode="dropdown"
android:entries="@array/week_en"
/>
<Spinnerandroid:id="@+id/spinner2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"

android:layout_below="@+id/spinner1"
android:layout_marginTop="30dp"
android:layout_marginLeft="20dp"
android:layout_marginStart="20dp"

android:spinnerMode="dropdown"
android:entries="@array/week_cn"
/>

</RelativeLayout>

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