Android實現三級聯動下拉框 下拉式清單spinner的執行個體

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主要實現辦法：動態載入各級下拉值的適配器

在監聽本級下拉框，當本級下拉框的選中值改變時，隨之修改下級的適配器的綁定值

      

    

XML布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="horizontal"    android:padding="8dp" >    <Spinner        android:id="@+id/spin_province"        android:layout_width="80dp"        android:layout_height="wrap_content" />    <Spinner        android:id="@+id/spin_city"        android:layout_width="112dp"        android:layout_height="wrap_content" />    <Spinner        android:id="@+id/spin_county"        android:layout_width="100dp"        android:layout_height="wrap_content" /></LinearLayout>

實現代碼：

package com.example.android.demo.spinner;import android.os.Bundle;import android.app.Activity;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Spinner;public class MainActivity extends Activity{    private Spinner provinceSpinner = null;  //省級（省、直轄市）    private Spinner citySpinner = null;     //地級市    private Spinner countySpinner = null;    //縣級（區、縣、縣級市）    ArrayAdapter<String> provinceAdapter = null;  //省級適配器    ArrayAdapter<String> cityAdapter = null;    //地級適配器    ArrayAdapter<String> countyAdapter = null;    //縣級適配器    static int provincePosition = 3;        //省級選項值    private String[] province = new String[] {"北京","上海","天津","廣東"};//,"重慶","黑龍江","江蘇","山東","浙江","香港","澳門"};    //地級選項值    private String[][] city = new String[][]             {                    { "東城區", "西城區", "崇文區", "宣武區", "朝陽區", "海澱區", "丰台區", "石景山區", "門頭溝區",                            "房山區", "通州區", "順義區", "大興區", "昌平區", "平穀區", "懷柔區", "密雲縣",                            "延慶縣" },                    { "長寧區", "靜安區", "普陀區", "閘北區", "虹口區" },                    { "和平區", "河東區", "河西區", "南開區", "河北區", "紅橋區", "塘沽區", "漢沽區", "大港區",                            "東麗區" },                    { "廣州", "深圳", "韶關" // ,"珠海","汕頭","佛山","湛江","肇慶","江門","茂名","惠州","梅州",                    // "汕尾","河源","陽江","清遠","東莞","中山","潮州","揭陽","雲浮"                    }            };    //縣級選項值    private String[][][] county = new String[][][]             {                    {   //北京                        {"無"},{"無"},{"無"},{"無"},{"無"},{"無"},{"無"},{"無"},{"無"},{"無"},                        {"無"},{"無"},{"無"},{"無"},{"無"},{"無"},{"無"},{"無"}                    },                    {    //上海                        {"無"},{"無"},{"無"},{"無"},{"無"}                    },                    {    //天津                        {"無"},{"無"},{"無"},{"無"},{"無"},{"無"},{"無"},{"無"},{"無"},{"無"}                    },                    {    //廣東                        {"海珠區","荔灣區","越秀區","白雲區","蘿崗區","天河區","黃埔區","花都區","從化市","增城市","番禺區","南沙區"}, //廣州                        {"寶安區","福田區","龍崗區","羅湖區","南山區","鹽田區"}, //深圳                        {"武江區","湞江區","曲江區","樂昌市","南雄市","始興縣","仁化縣","翁源縣","新豐縣","乳源縣"}  //韶關                    }            };        @Override    protected void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        setSpinner();    }        /*     * 設定下拉框     */    private void setSpinner()    {                provinceSpinner = (Spinner)findViewById(R.id.spin_province);        citySpinner = (Spinner)findViewById(R.id.spin_city);        countySpinner = (Spinner)findViewById(R.id.spin_county);        //綁定適配器和值        provinceAdapter = new ArrayAdapter<String>(MainActivity.this,                android.R.layout.simple_spinner_item, province);        provinceSpinner.setAdapter(provinceAdapter);        provinceSpinner.setSelection(3,true);  //設定預設選中項，此處為預設選中第4個值        cityAdapter = new ArrayAdapter<String>(MainActivity.this,                 android.R.layout.simple_spinner_item, city[3]);        citySpinner.setAdapter(cityAdapter);        citySpinner.setSelection(0,true);  //預設選中第0個        countyAdapter = new ArrayAdapter<String>(MainActivity.this,                android.R.layout.simple_spinner_item, county[3][0]);        countySpinner.setAdapter(countyAdapter);        countySpinner.setSelection(0, true);                //省級下拉框監聽        provinceSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()        {            // 表示選項被改變的時候觸發此方法，主要實現辦法：動態改變地級適配器的綁定值            @Override            public void onItemSelected(AdapterView<?> arg0, View arg1, int position, long arg3)            {                //position為當前省級選中的值的序號                //將地級適配器的值改變為city[position]中的值                cityAdapter = new ArrayAdapter<String>(                        MainActivity.this, android.R.layout.simple_spinner_item, city[position]);                // 設定二級下拉式清單的選項內容適配器                citySpinner.setAdapter(cityAdapter);                provincePosition = position;    //記錄當前省級序號，留給下面修改縣級適配器時用            }            @Override            public void onNothingSelected(AdapterView<?> arg0)            {            }        });                //地級下拉監聽        citySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()        {            @Override            public void onItemSelected(AdapterView<?> arg0, View arg1,                    int position, long arg3)            {                countyAdapter = new ArrayAdapter<String>(MainActivity.this,                        android.R.layout.simple_spinner_item, county[provincePosition][position]);                countySpinner.setAdapter(countyAdapter);            }            @Override            public void onNothingSelected(AdapterView<?> arg0)            {            }        });    }}

要擷取下拉框spinner中選中的值，用下面這方法就OK了

provinceSpinner.getSelectedItem().toString();

citySpinner.getSelectedItem().toString();

countySpinner.getSelectedItem().toString();

THE END

Android實現三級聯動下拉框 下拉式清單spinner的執行個體