package com.kale.spinner;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemSelectedListener;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

import android.widget.Toast;

public class MainActivity extends Activity {

    Spinner spinner01,spinner02,spinner03;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        viewInit();

        String []arr = {"JAVA","Android","xml","ios"};

        //采用android提供的布局来创建

        ArrayAdapter<String> adapter01 = new ArrayAdapter<>(this,

                android.R.layout.simple_list_item_multiple_choice,arr);

        spinner01.setAdapter(adapter01);

        //监听器

        spinner01.setOnItemSelectedListener(new OnItemSelectedListener() {

            @Override

            public void onItemSelected(AdapterView<?> adapterView, View arg1,

                    int position, long id) {

                // TODO 自动生成的方法存根

                String selected = adapterView.getItemAtPosition(position).toString();

                Toast.makeText(getApplicationContext(), selected, 0).show();

            }

            @Override

            public void onNothingSelected(AdapterView<?> arg0) {

            }

        });

//------------------------------------------------------------------------------

        //默认的布局文件设置spinner的样式，用写死的数据来创建的。不是很推荐

        ArrayAdapter<CharSequence> adapter02 = ArrayAdapter.createFromResource(this,

                R.array.item, android.R.layout.simple_spinner_item);

        //设置spinner点开后下拉菜单的样式

        adapter02.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

        spinner02.setAdapter(adapter02);

        //spinner02.setPrompt("test");//设置提示文字,现在的界面中已经不显示了。所以可以说是没用了

//------------------------------------------------------------------------------

        //采用动态的数据，布局文件是自己定义的item

        ArrayAdapter<String> adapter03 = new ArrayAdapter<>(this, R.layout.item,

                R.id.textView_id, arr);

        spinner03.setAdapter(adapter03);

    }

    private void viewInit() {

        spinner01 = (Spinner) findViewById(R.id.spinner01_id);

        spinner02 = (Spinner) findViewById(R.id.spinner02_id);

        spinner03 = (Spinner) findViewById(R.id.spinner03_id);

    }

}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    android:padding="16dp">

    <!--

    android:dropDownWidth                  下拉列表宽度

    android:dropDownHorizontalOffset    下拉列表距离左边的距离

    android:dropDownVerticalOffset      下拉菜单和文本之间的垂直偏移量

    android:popupBackground              下拉列表中的背景色

    android:prompt                         下拉列表中的提示信息

     -->

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="用代码填充数据的spinner(用android自带的布局)"

        android:layout_marginTop="16dp"

        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Spinner

        android:id="@+id/spinner01_id"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:popupBackground="#ade9ee"

        android:dropDownVerticalOffset="3dp"

         android:prompt="@string/hello_world"/>

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="数据写到array中的spinner（用android提供的布局）"

        android:layout_marginTop="26dp"

        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Spinner

        android:id="@+id/spinner02_id"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_marginTop="16dp"

        android:dropDownVerticalOffset="3dp"

         android:prompt="@string/hello_world"/>

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="使用自定义布局并动态填入数据的spinner"

        android:layout_marginTop="26dp"

        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Spinner

        android:id="@+id/spinner03_id"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"/>    

 </LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<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="8dp">

    <TextView
android:id="@+id/textView_id"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Large Text"

        android:textColor="#0000ff"

        android:gravity="center_horizontal"

        android:textAppearance="?android:attr/textAppearanceLarge" />

</LinearLayout>