android級聯下拉菜單

這裏我使用3層級聯菜單

這裏就給示例把，不做過多的解釋，代碼中基本的註釋

activity_main.xml代碼

<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="match_parent"
    android:orientation="horizontal"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.spinner.MainActivity" >

    <Spinner 
        android:layout_weight="1"
        android:id="@+id/spinner_1"
        android:layout_height="30dp"
        android:layout_width="wrap_content"/>

     <Spinner 
        android:id="@+id/spinner_2"
        android:layout_weight="1"
        android:layout_height="30dp"
        android:layout_width="wrap_content"/>
      <Spinner 
        android:id="@+id/spinner_3"
        android:layout_weight="1"
        android:layout_height="30dp"
        android:layout_width="wrap_content"/>
</LinearLayout>

MainActivity.java代碼

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 {

	//設置三級菜單
	private Spinner spinner_1;//1
	private Spinner spinner_2;//2
	private Spinner spinner_3;//3
	private ArrayAdapter<String> adapter1,adapter2,adapter3;//對應的適配器
	private int provinceNum = 0;
	
	//下拉單數據的初始化
	private String province[] = {"江西省","上海市","江蘇"};
	private String city[][] = {{"南昌","贛州"},{"上海1","上海2"},{"江蘇","南京"}};
	private String area[][][] = {{{"南昌市","紅谷灘","新建區"},{"章貢區","贛縣"}},{{"上海11","上海111"},
		{"上海22"}},{{"江蘇11","江蘇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，這裏使用ArrayAdapter
		adapter1 = new ArrayAdapter<String>(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]);
		//設置選擇事件
		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級菜單position，爲3級菜單顯示的準備
				provinceNum = position;
			}

			@Override
			public void onNothingSelected(AdapterView<?> parent) {
				// TODO Auto-generated method stub
				
			}
			
		});
		//2級菜單的選擇事件
		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);
		
	}
}

結果圖：