Android实现(省、市、县)三级联动下拉框 下拉列表spinner
主要实现办法:动态加载各级下拉值的适配器
在监听本级下拉框,当本级下拉框的选中值改变时,随之修改下级的适配器的绑定值
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>
实现代码:
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; //省级(省、直辖市) private Spinner citySpinner = null; //地级市 private Spinner countySpinner = null; //县级(区、县、县级市) ArrayAdapter<String> provinceAdapter = null; //省级适配器 ArrayAdapter<String> cityAdapter = null; //地级适配器 ArrayAdapter<String> countyAdapter = null; //县级适配器 static int provincePosition = 3; //省级选项值 private String[] province = new String[] {"北京","上海","天津","广东"};//,"重庆","黑龙江","江苏","山东","浙江","香港","澳门"}; //地级选项值 private String[][] city = new String[][] { { "东城区", "西城区", "崇文区", "宣武区", "朝阳区", "海淀区", "丰台区", "石景山区", "门头沟区", "房山区", "通州区", "顺义区", "大兴区", "昌平区", "平谷区", "怀柔区", "密云县", "延庆县" }, { "长宁区", "静安区", "普陀区", "闸北区", "虹口区" }, { "和平区", "河东区", "河西区", "南开区", "河北区", "红桥区", "塘沽区", "汉沽区", "大港区", "东丽区" }, { "广州", "深圳", "韶关" // ,"珠海","汕头","佛山","湛江","肇庆","江门","茂名","惠州","梅州", // "汕尾","河源","阳江","清远","东莞","中山","潮州","揭阳","云浮" } }; //县级选项值 private String[][][] county = new String[][][] { { //北京 {"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"}, {"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"} }, { //上海 {"无"},{"无"},{"无"},{"无"},{"无"} }, { //天津 {"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"} }, { //广东 {"海珠区","荔湾区","越秀区","白云区","萝岗区","天河区","黄埔区","花都区","从化市","增城市","番禺区","南沙区"}, //广州 {"宝安区","福田区","龙岗区","罗湖区","南山区","盐田区"}, //深圳 {"武江区","浈江区","曲江区","乐昌市","南雄市","始兴县","仁化县","翁源县","新丰县","乳源县"} //韶关 } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); setSpinner(); } /* * 设置下拉框 */ private void setSpinner() { provinceSpinner = (Spinner)findViewById(R.id.spin_province); citySpinner = (Spinner)findViewById(R.id.spin_city); countySpinner = (Spinner)findViewById(R.id.spin_county); //绑定适配器和值 provinceAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_item, province); provinceSpinner.setAdapter(provinceAdapter); provinceSpinner.setSelection(3,true); //设置默认选中项,此处为默认选中第4个值 cityAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_item, city[3]); citySpinner.setAdapter(cityAdapter); citySpinner.setSelection(0,true); //默认选中第0个 countyAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_item, county[3][0]); countySpinner.setAdapter(countyAdapter); countySpinner.setSelection(0, true); //省级下拉框监听 provinceSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { // 表示选项被改变的时候触发此方法,主要实现办法:动态改变地级适配器的绑定值 @Override public void onItemSelected(AdapterView<?> arg0, View arg1, int position, long arg3) { //position为当前省级选中的值的序号 //将地级适配器的值改变为city[position]中的值 cityAdapter = new ArrayAdapter<String>( MainActivity.this, android.R.layout.simple_spinner_item, city[position]); // 设置二级下拉列表的选项内容适配器 citySpinner.setAdapter(cityAdapter); provincePosition = position; //记录当前省级序号,留给下面修改县级适配器时用 } @Override public void onNothingSelected(AdapterView<?> arg0) { } }); //地级下拉监听 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) { } }); } }
要获取下拉框spinner中选中的值,用下面这方法就OK了
provinceSpinner.getSelectedItem().toString();
citySpinner.getSelectedItem().toString();
countySpinner.getSelectedItem().toString();
THE END