Android实现三级联动下拉框 下拉列表spinner的实例代码
Android实现三级联动下拉框 下拉列表spinner的实例代码
发布时间:2016-12-28 来源:查字典编辑
摘要: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...

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

Android实现三级联动下拉框 下拉列表spinner的实例代码1 Android实现三级联动下拉框 下拉列表spinner的实例代码2 Android实现三级联动下拉框 下拉列表spinner的实例代码3

Android实现三级联动下拉框 下拉列表spinner的实例代码4 Android实现三级联动下拉框 下拉列表spinner的实例代码5 Android实现三级联动下拉框 下拉列表spinner的实例代码6

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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