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