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：
复制代码 代码如下:
<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：
复制代码 代码如下:
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
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