Android 實現下拉式清單級聯

標籤：android   級聯   

.xml代碼如下：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="horizontal" android:layout_width="fill_parent"android:layout_height="fill_parent"><Spinnerandroid:id="@+id/city"android:prompt="@string/city_prompt"android:layout_width="wrap_content"android:layout_height="wrap_content"android:entries="@array/city_lables"/><Spinnerandroid:id="@+id/area"android:prompt="@string/city_prompt"android:layout_width="wrap_content"android:layout_height="wrap_content"/></LinearLayout>

.java 代碼如下：

package org.lxh.demo;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.ArrayAdapter;import android.widget.Spinner;public class MySpinnerListenerDemo extends Activity {private Spinner city = null; // 下拉式清單方塊內容private Spinner area = null; // 二級列表private String[][] areaData = new String[][] {{ "東城", "西城", "朝陽", "大興", "平穀" }, // 針對於一級的子資訊{ "黃浦", "楊浦", "閔行" }, // 針對於二級的子資訊{ "廣州" } // 針對於三級的子資訊}; // 子功能表項private ArrayAdapter<CharSequence> adapterArea = null;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);super.setContentView(R.layout.main);this.city = (Spinner) super.findViewById(R.id.city); // 取得下拉式清單方塊this.area = (Spinner) super.findViewById(R.id.area); // 取得下拉式清單方塊this.city.setOnItemSelectedListener(new OnItemSelectedListenerImpl());}private class OnItemSelectedListenerImpl implements OnItemSelectedListener {public void onItemSelected(AdapterView<?> parent, View view,int position, long id) { // 表示選項改變的時候觸發MySpinnerListenerDemo.this.adapterArea = new ArrayAdapter<CharSequence>(MySpinnerListenerDemo.this,android.R.layout.simple_spinner_item,MySpinnerListenerDemo.this.areaData[position]); // 定義所有的清單項目MySpinnerListenerDemo.this.area.setAdapter(MySpinnerListenerDemo.this.adapterArea);// 設定二級下拉式清單的選項內容}public void onNothingSelected(AdapterView<?> arg0) { // 表示沒有選項的時候觸發// 一般此方法現在不關心}}}

效果如下：

源碼下載：http://download.csdn.net/detail/yayun0516/8363843

Android 實現下拉式清單級聯