Select a spinner from the list

1. Only use xml configuration to display the list

Add arrays. XML to RES \ values

1 <? XML version = "1.0" encoding = "UTF-8"?> 2 <resources> 3 4 <string-array name = "books"> 5 <item> odd words </item> 6 <item> highlight </item> 7 <item> rain currently, </item> 8 <item> is becoming more and more consistent in </item> 9 </string-array> 10 11 </resources>

Add a spinner to the XML file on the home page.

1     <Spinner2         android:id="@+id/spi3"3         android:layout_width="match_parent"4         android:layout_height="wrap_content"5         android:entries="@array/books" >6     </Spinner>

Effect

 

2. Use the background to dynamically add

Layout:

1     <Spinner2         android:id="@+id/spi"3         android:layout_width="match_parent"4         android:layout_height="wrap_content" >5     </Spinner>

Add data class

1 package COM. example. myadapter; 2 3 Import Java. util. arraylist; 4 Import Java. util. hashmap; 5 import Java. util. list; 6 Import Java. util. map; 7 8 Import COM. example. androidspinner. r; 9 10 public class myadapter {11 12 public myadapter () {13 // todo auto-generated constructor stub14} 15 16 public static list <string> getdata () {17 list <string> List = new arraylist <string> (); 18 list. add ("Beijing"); 19 list. add ("Wuhan"); 20 list. add ("Guangzhou"); 21 return list; 22} 23 24}

Add data binding in the main program

 1 package com.example.androidspinner; 2  3 import java.util.List; 4 import java.util.Map; 5  6 import com.example.myadapter.Myadapter; 7  8 import android.os.Bundle; 9 import android.app.Activity;10 import android.view.Menu;11 import android.view.View;12 import android.widget.AdapterView;13 import android.widget.AdapterView.OnItemSelectedListener;14 import android.widget.ArrayAdapter;15 import android.widget.SimpleAdapter;16 import android.widget.Spinner;17 18 public class AndroidSpinnerActivity extends Activity {19     private Spinner spi;20 21     @Override22     protected void onCreate(Bundle savedInstanceState) {23         super.onCreate(savedInstanceState);24         setContentView(R.layout.activity_android_spinner);25         spi = (Spinner) this.findViewById(R.id.spi);26         List<String> list = Myadapter.getData();27         ArrayAdapter<String> adapter = new ArrayAdapter<String>(28                 AndroidSpinnerActivity.this,29                 android.R.layout.simple_spinner_item, list);30         spi.setAdapter(adapter);31 32                 }33 34           
40     }41 42     @Override43     public boolean onCreateOptionsMenu(Menu menu) {44         // Inflate the menu; this adds items to the action bar if it is present.45         getMenuInflater().inflate(R.menu.activity_android_spinner, menu);46         return true;47     }48 49 }

3. Add the option icon

Layout:

1     <Spinner2         android:id="@+id/spi2"3         android:layout_width="match_parent"4         android:layout_height="wrap_content" >5     </Spinner>

Add data class

1 package COM. example. myadapter; 2 3 Import Java. util. arraylist; 4 Import Java. util. hashmap; 5 import Java. util. list; 6 Import Java. util. map; 7 8 Import COM. example. androidspinner. r; 9 10 public class myadapter {11 12 public myadapter () {13 // todo auto-generated constructor stub14} 15 16 17 public static list <Map <string, object> getmapdata () {18 list <Map <string, Object> List = new arraylist <Map <string, Object> (); 19 Map <string, object> map1 = new hashmap <string, Object> (); 20 map1.put ("logo", R. drawable. add); 21 map1.put ("appname", "Beijing"); 22 list. add (map1); 23 24 Map <string, Object> MAP2 = new hashmap <string, Object> (); 25 map2.put ("logo", R. drawable. application); 26 map2.put ("appname", "Wuhan"); 27 List. add (MAP2); 28 return list; 29 30} 31 32}

Add data binding in the main program

 1 package com.example.androidspinner; 2  3 import java.util.List; 4 import java.util.Map; 5  6 import com.example.myadapter.Myadapter; 7  8 import android.os.Bundle; 9 import android.app.Activity;10 import android.view.Menu;11 import android.view.View;12 import android.widget.AdapterView;13 import android.widget.AdapterView.OnItemSelectedListener;14 import android.widget.ArrayAdapter;15 import android.widget.SimpleAdapter;16 import android.widget.Spinner;17 18 public class AndroidSpinnerActivity extends Activity {19         private Spinner spi2;20 21     @Override22     protected void onCreate(Bundle savedInstanceState) {23         super.onCreate(savedInstanceState);24         setContentView(R.layout.activity_android_spinner);25 26         spi2 = (Spinner) this.findViewById(R.id.spi2);27 28         List<Map<String, Object>> listMap = Myadapter.getMapData();29 30         SimpleAdapter simpleAdapter = new SimpleAdapter(31                 AndroidSpinnerActivity.this, listMap, R.layout.items,32                 new String[] { "logo", "appname" }, new int[] { R.id.imgview,33                         R.id.labview });34         spi2.setAdapter(simpleAdapter);35         36         spi2.setOnItemSelectedListener(new OnItemSelectedListener() {37 38             @Override39             public void onItemSelected(AdapterView<?> parent, View arg1,40                     int position, long id) {41                 String appname=((Map<String,Object>)spi2.getItemAtPosition(position)).get("appname").toString();42                 setTitle(appname);43             }44 45             @Override46             public void onNothingSelected(AdapterView<?> arg0) {47                 // TODO Auto-generated method stub48                 49             }50         });51     }52 53     @Override54     public boolean onCreateOptionsMenu(Menu menu) {55         // Inflate the menu; this adds items to the action bar if it is present.56         getMenuInflater().inflate(R.menu.activity_android_spinner, menu);57         return true;58     }59 60 }

Select a spinner from the list