前言：
在我们输入信息是经常会让我们输入户籍所在地，此时省市级三级联动就很有必要了
正文：
首先在xml文件中添加如下代码
1 <?xml version="1.0" encoding="utf-8"?> 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 xmlns:tools="http://schemas.android.com/tools" 4 android:layout_width="match_parent" 5 android:layout_height="match_parent" 6 android:paddingBottom="@dimen/activity_vertical_margin" 7 android:paddingLeft="@dimen/activity_horizontal_margin" 8 android:paddingRight="@dimen/activity_horizontal_margin" 9 android:paddingTop="@dimen/activity_vertical_margin" 10 11 12 tools:context="com.example.aaaaa.sp.MainActivity"> 13 14 <TextView 15 android:id="@+id/textview1" 16 android:layout_width="match_parent" 17 android:layout_height="wrap_content" 18 android:text="请选择您所在的城市" 19 android:textSize="20sp" /> 20 21 <LinearLayout 22 android:layout_width="match_parent" 23 android:layout_height="wrap_content" 24 android:layout_marginTop="30dp" 25 26 > 27 28 <Spinner 29 30 android:id="@+id/provicespinner" 31 android:layout_width="match_parent" 32 android:layout_height="wrap_content" 33 android:layout_weight="1"> 34 35 </Spinner> 36 37 <Spinner 38 android:id="@+id/cityspinner" 39 android:layout_width="match_parent" 40 android:layout_height="wrap_content" 41 android:layout_toRightOf="@id/provicespinner" 42 android:layout_weight="1"> 43 44 </Spinner> 45 46 <Spinner 47 android:id="@+id/countyspinner" 48 android:layout_width="match_parent" 49 android:layout_height="wrap_content" 50 android:layout_toRightOf="@id/cityspinner" 51 android:layout_weight="1"> 52 53 </Spinner> 54 </LinearLayout> 55 56 <TextView 57 android:id="@+id/textview" 58 android:layout_width="match_parent" 59 android:layout_height="wrap_content" 60 android:layout_alignParentLeft="true" 61 android:layout_alignParentStart="true" 62 android:layout_centerVertical="true" 63 android:gravity="center_horizontal" 64 android:text="显示城市" 65 android:textSize="20sp" /> 66 </RelativeLayout>
Java代码如：
1 import android.support.v7.app.AppCompatActivity;
2 import android.os.Bundle;
3 import android.view.View;
4 import android.widget.AdapterView;
5 import android.widget.ArrayAdapter;
6 import android.widget.Spinner;
7 import android.widget.TextView;
8
9 import java.util.ArrayList;
10 import java.util.List;
11
12 public class MainActivity extends AppCompatActivity {
13 private Spinner provicespinner;
14 private Spinner cityspinner;
15 private Spinner countyspinner;
16 private ArrayAdapter<String> priviceAdapter;
17 private ArrayAdapter cityAdapter;
18 private ArrayAdapter contyAdapter;
19 private int privicePosition;
20 private int cityPosition;
21 private int countyPosition;
22 private String[] provice = {"山西", "江苏", "安徽"};
23 private String[][] city = {{"太原", "大同", "阳泉"}, {"徐州", "南京", "苏州"}, {"宿州", "合肥", "淮北"}};
24 private String[][][] county = {{{"小店区", "迎泽区", "尖草坪区"}, {"阳高县", "天镇县", "浑源县"}, {"城区",
25 "郊区", "矿区"}}, {{"沛县", "丰县", "临空新城"}, {"玄武", "鼓楼", "下关"}, {"虎丘区", "吴中区",
26 "吴江区"}}, {{"砀山", "萧县", "涌泉区"}, {"肥东县", "肥西县", "长丰县"}, {"杜集区", "相山区", "烈山区"}}};
27 private TextView textView;
28
29 @Override
30 protected void onCreate(Bundle savedInstanceState) {
31 super.onCreate(savedInstanceState);
32 setContentView(R.layout.activity_main);
33 textView = (TextView) findViewById(R.id.textview);
34 provicespinner = (Spinner) findViewById(R.id.provicespinner);
35 cityspinner = (Spinner) findViewById(R.id.cityspinner);
36 countyspinner = (Spinner) findViewById(R.id.countyspinner);
37 //显示省
38 priviceAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, provice);
39 provicespinner.setAdapter(priviceAdapter);
40 //设置省级的监听器--目的是在你选择省后直接显示对应的市，最主要的是应用position
41 provicespinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
42 @Override
43 public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
44 cityAdapter = new ArrayAdapter(MainActivity.this, android.R.layout.simple_list_item_1, city[position]);
45 cityspinner.setAdapter(cityAdapter);
46 privicePosition = position;
47
48 }
49
50 @Override
51 public void onNothingSelected(AdapterView<?> parent) {
52
53 }
54 });
55 //给市spinner设置监听器
56 cityspinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
57 @Override
58 public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
59 contyAdapter = new ArrayAdapter(MainActivity.this, android.R.layout.simple_list_item_1, county[privicePosition][position]);
60 countyspinner.setAdapter(contyAdapter);
61 //为能把此时的position传出去
62 cityPosition = position;
63
64
65 }
66
67 @Override
68 public void onNothingSelected(AdapterView<?> parent) {
69
70 }
71 });
72 //为县设置适配器目的是为了显示你算选的省市县
73 countyspinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
74 @Override
75 public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
76 //在下面所选内容显示
77 textView.setText("选择的城市为" + " " + provice[privicePosition] + " " + city[privicePosition][cityPosition] + " " + county[privicePosition][cityPosition][position]);
78 }
79
80 @Override
81 public void onNothingSelected(AdapterView<?> parent) {
82
83 }
84 });
85 }
86 }
这样实现其实就是练练手，在实际的操作中可以说用到的东西复杂的多，上面注释解释的很详细就不一步步的解释，重要的就是运用spinner的监听器里面的参数position，从而提取出上面定义的几个数组中数据
原文地址：https://www.cnblogs.com/z-cg/p/12348535.html
时间： 2024-10-22 12:25:55