android级联下拉菜单

这里我使用3层级联菜单

这里就给示例把，不做过多的解释，代码中基本的注释

activity_main.xml代码

MainActivity.java代码

package com.example.spinner;

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 MainActivity extends Activity {

	//设置三级菜单
	private Spinner spinner_1;//1
	private Spinner spinner_2;//2
	private Spinner spinner_3;//3
	private ArrayAdapter adapter1,adapter2,adapter3;//对应的适配器
	private int provinceNum = 0;
	
	//下拉单数据的初始化
	private String province[] = {"江西省","上海市","江苏"};
	private String city[][] = {{"南昌","赣州"},{"上海1","上海2"},{"江苏","南京"}};
	private String area[][][] = {{{"南昌市","红谷滩","新建区"},{"章贡区","赣县"}},{{"上海11","上海111"},
		{"上海22"}},{{"江苏11","江苏22"},{"南京11","南京22"}}};
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		spinner_1 = (Spinner)findViewById(R.id.spinner_1);
		spinner_2 = (Spinner)findViewById(R.id.spinner_2);
		spinner_3 = (Spinner)findViewById(R.id.spinner_3);
		//初始化，这里使用ArrayAdapter
		adapter1 = new ArrayAdapter(this, android.R.layout.simple_dropdown_item_1line, province);
		adapter2 = new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line, city[0]);
		adapter3 = new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line, area[0][0]);
		//设置选择事件
		spinner_1.setOnItemSelectedListener(new OnItemSelectedListener() {

			@Override
			public void onItemSelected(AdapterView parent, View view, int position, long id) {
				// TODO Auto-generated method stub
				adapter2 = new ArrayAdapter<>(MainActivity.this, 
						android.R.layout.simple_dropdown_item_1line, city[position]);
				spinner_2.setAdapter(adapter2);
				//保存1级菜单position，为3级菜单显示的准备
				provinceNum = position;
			}

			@Override
			public void onNothingSelected(AdapterView parent) {
				// TODO Auto-generated method stub
				
			}
			
		});
		//2级菜单的选择事件
		spinner_2.setOnItemSelectedListener(new OnItemSelectedListener() {
			@Override
			public void onItemSelected(AdapterView parent, View view, int position, long id) {
				// TODO Auto-generated method stub
				adapter3 = new ArrayAdapter<>(MainActivity.this, 
						android.R.layout.simple_dropdown_item_1line,area[provinceNum][position]);
				spinner_3.setAdapter(adapter3);
			}
			@Override
			public void onNothingSelected(AdapterView parent) {
				// TODO Auto-generated method stub
				
			}
		});
		
		spinner_1.setAdapter(adapter1);
		spinner_2.setAdapter(adapter2);
		spinner_3.setAdapter(adapter3);
		
	}
}

结果图：