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android實現(xiàn)下拉菜單三級聯(lián)動

更新時間：2019年10月28日 08:37:37 作者：AirMario

這篇文章主要為大家詳細(xì)介紹了android實現(xiàn)下拉菜單三級聯(lián)動，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價值，感興趣的小伙伴們可以參考一下

android中的下拉菜單聯(lián)動應(yīng)用非常普遍，android中的下拉菜單用Spinner就能實現(xiàn)，以下列子通過簡單的代碼實現(xiàn)三級菜單聯(lián)動。

一樣式文件

<RelativeLayout 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: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_width="match_parent"
    android:layout_height="wrap_content"
    
    android:id="@+id/spn"
    android:dropDownWidth="200dp"/>
  
  <Spinner android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/spn"
    android:id="@+id/city"
    android:dropDownWidth="200dp"/>
  <Spinner android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/city"
    android:id="@+id/counstryside"
    android:dropDownWidth="200dp"/>
 
</RelativeLayout>

二聯(lián)動邏輯代碼

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;
 
/**
 * @author ZMC
 * 三級聯(lián)動主要是靈活的應(yīng)用三維數(shù)組
 */
public class MainActivity extends Activity {
 private String province[] = new String[]{"江西","湖南"};
 private Spinner spinner1,spinner2,spinner3;
 private int provinceindex;
 private String city [][] = {{"南昌","贛州"},{"長沙","湘潭"}};
 private String counstryside [][][] = {{{"青山湖區(qū)","南昌縣"},{"章貢區(qū)","贛縣"}},{{"長沙縣","沙縣"},{"湘潭縣","象限"}}};
 ArrayAdapter<String> adapter1,adapter2,adapter3;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 spinner1 = (Spinner) findViewById(R.id.spn);
 adapter1 = new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line,province);
 spinner1.setAdapter(adapter1);
 
 spinner2 = (Spinner)findViewById(R.id.city);
 adapter2 = new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line,city[0]);
 spinner2.setAdapter(adapter2);
 
 spinner3 = (Spinner)findViewById(R.id.counstryside);
 adapter3 = new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line,counstryside[0][0]);
 spinner3.setAdapter(adapter3);
 spinner1.setOnItemSelectedListener(new OnItemSelectedListener() {
 
  @Override
  public void onItemSelected(AdapterView<?> parent, View view,
   int position, long id) {
  // TODO Auto-generated method stub
  provinceindex = position;
  adapter2 = new ArrayAdapter<>(MainActivity.this, android.R.layout.simple_dropdown_item_1line,city[position]);
  spinner2.setAdapter(adapter2);
  }
 
  @Override
  public void onNothingSelected(AdapterView<?> parent) {
  // TODO Auto-generated method stub
  
  }
 });
 
 spinner2.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,counstryside[provinceindex][position]);
  //adapter3.notifyDataSetChanged();
  spinner3.setAdapter(adapter3);
  }
 
  @Override
  public void onNothingSelected(AdapterView<?> parent) {
  // TODO Auto-generated method stub
  //當(dāng)時據(jù)為空的時候觸發(fā)的
  }
 });
 
 
 }
 
 
}

三結(jié)果

四總結(jié)

三級聯(lián)動主要是靈活的應(yīng)用三維數(shù)組，這樣能很方便的通過數(shù)組索引將三個菜單關(guān)聯(lián)，同時通過設(shè)置Spinner的setOnItemSelectedListener來監(jiān)聽選擇的動作，動態(tài)設(shè)置下拉菜單的內(nèi)容。

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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