Android 开发笔记___spinner__适配器基础_arrayadapter

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
     android:padding="20dp" >

     <Spinner
         android:id="@+id/sp_dialog"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:spinnerMode="dialog" />
 </LinearLayout>

 <TextView xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/tv_name"
     android:layout_width="match_parent"
     android:layout_height="40dp"
     android:singleLine="true"
     android:gravity="center"
     android:textSize="17sp"
     android:textColor="#ff0000" />

 package com.example.alimjan.hello_world;

 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
 import android.widget.Spinner;
 import android.widget.Toast;

 /**
  * Created by alimjan on 7/2/2017.
  */

 public class class_3_3_1_1 extends AppCompatActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.code_3_3_1_1);

         ArrayAdapter<String> starAdapter = new ArrayAdapter<String>(this,
                 R.layout.item_select, starArray);
         starAdapter.setDropDownViewResource(R.layout.item_dropdown);

         Spinner sp = (Spinner) findViewById(R.id.sp_dialog);
         sp.setPrompt("请选择行星");
         sp.setAdapter(starAdapter);
         sp.setSelection(0);
         sp.setOnItemSelectedListener(new MySelectedListener());
     }

     private String[] starArray = {"水星", "金星", "地球", "火星", "木星", "土星"};
     class MySelectedListener implements AdapterView.OnItemSelectedListener {
         public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
             Toast.makeText(class_3_3_1_1.this, "您选择的是"+starArray[arg2], Toast.LENGTH_LONG).show();
         }

         public void onNothingSelected(AdapterView<?> arg0) {
         }
     }
     public static void startHome(Context mContext) {
         Intent intent = new Intent(mContext, class_3_3_1_1.class);
         mContext.startActivity(intent);
     }

 }

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
     android:padding="20dp" >

     <Spinner
         android:id="@+id/sp_icon"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:spinnerMode="dialog" />

 </LinearLayout>

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="horizontal" >

     <ImageView
         android:id="@+id/iv_icon"
         android:layout_width="0dp"
         android:layout_height="50dp"
         android:layout_weight="1"
         android:gravity="center" />

     <TextView
         android:id="@+id/tv_name"
         android:layout_width="0dp"
         android:layout_height="match_parent"
         android:layout_weight="3"
         android:gravity="center"
         android:textSize="17sp"
         android:textColor="#ff0000" />

 </LinearLayout>

 package com.example.alimjan.hello_world;

 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.SimpleAdapter;
 import android.widget.Spinner;
 import android.widget.Toast;

 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

 /**
  * Created by alimjan on 7/2/2017.
  */

 public class class_3_3_1_2 extends AppCompatActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.code_3_3_1_2);

         List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
         for (int i = 0; i < iconArray.length; i++) {
             Map<String, Object> item = new HashMap<String, Object>();
             item.put("icon", iconArray[i]);
             item.put("name", starArray[i]);
             list.add(item);
         }
         SimpleAdapter starAdapter = new SimpleAdapter(this, list,
                 R.layout.item_select, new String[] { "icon", "name" },
                 new int[] {R.id.iv_icon, R.id.tv_name});
         starAdapter.setDropDownViewResource(R.layout.item_simple);

         Spinner sp = (Spinner) findViewById(R.id.sp_icon);
         sp.setPrompt("请选择行星");
         sp.setAdapter(starAdapter);
         sp.setSelection(0);
         sp.setOnItemSelectedListener(new MySelectedListener());
     }

     private int[] iconArray = {R.drawable.shuixing, R.drawable.jinxing, R.drawable.diqiu,
             R.drawable.huoxing, R.drawable.muxing, R.drawable.tuxing};
     private String[] starArray = {"水星", "金星", "地球", "火星", "木星", "土星"};
     class MySelectedListener implements AdapterView.OnItemSelectedListener {
         public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
             Toast.makeText(class_3_3_1_2.this, "您选择的是"+starArray[arg2], Toast.LENGTH_LONG).show();
         }

         public void onNothingSelected(AdapterView<?> arg0) {
         }
     }

     public static void startHome(Context mContext) {
         Intent intent = new Intent(mContext, class_3_3_1_2.class);
         mContext.startActivity(intent);
     }

 }

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
     android:padding="20dp" >

     <Spinner
         android:id="@+id/sp_dropdown"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:spinnerMode="dropdown" />

 </LinearLayout>

 package com.example.alimjan.hello_world;

 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
 import android.widget.Spinner;
 import android.widget.Toast;

 /**
  * Created by alimjan on 7/2/2017.
  */

 public class class_3_3_1_3 extends AppCompatActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.code_3_3_1_3);

         ArrayAdapter<String> starAdapter = new ArrayAdapter<String>(this,
                 R.layout.item_select, starArray);
         starAdapter.setDropDownViewResource(R.layout.item_dropdown);

         Spinner sp = (Spinner) findViewById(R.id.sp_dropdown);
         sp.setPrompt("请选择行星");
         sp.setAdapter(starAdapter);
         sp.setSelection(0);
         sp.setOnItemSelectedListener(new MySelectedListener());
     }

     private String[] starArray = {"水星", "金星", "地球", "火星", "木星", "土星"};
     class MySelectedListener implements AdapterView.OnItemSelectedListener {
         public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
             Toast.makeText(class_3_3_1_3.this, "您选择的是"+starArray[arg2], Toast.LENGTH_LONG).show();
         }

         public void onNothingSelected(AdapterView<?> arg0) {
         }
     }
     public static void startHome(Context mContext) {
         Intent intent = new Intent(mContext, class_3_3_1_3.class);
         mContext.startActivity(intent);
     }

 }