Spinner2

MainActivity.java

package com.example.spinnertest2;import java.util.ArrayDeque;import java.util.ArrayList;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.widget.ArrayAdapter;import android.widget.Spinner;/*简单实现了ArrayAdapter实例 * */public class MainActivity extends Activity {    private Spinner mSpinner_city;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mSpinner_city = (Spinner) findViewById(R.id.spn_city);        ArrayList<String> list = new ArrayList<String>();        list.add("fuqing");        list.add("quanzhou");        list.add("xiamen");//        主要第三个参数的item必须在在第二个参数的layout中，否则会报错        ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this, R.layout.item,                R.id.tv_item, list);        mSpinner_city.setAdapter(adapter);        mSpinner_city.setPrompt("city");    }}**activity_main**

<?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" >    <TextView         android:id="@+id/tv_item"        android:layout_width="match_parent"        android:layout_height="wrap_content"/></LinearLayout>