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);
    }

}