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>