Spinner使用一

Spinner使用一

一、使用方法

1、在layout中创建Spinner控件

<Spinner
android:id="@+id/spinner1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>

2、给数据适配器添加数据源和显示格式

String[] city=new String[]{"北京","上海","香港","澳门"};
ArrayAdapter<String> adapter=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, city);

3、给Spinner控件添加数据适配器

spinner1.setAdapter(adapter);

二、效果图及代码

fry.Activity01

package fry;

import com.example.SpinnerDemo.R;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.Spinner;

public class Activity01 extends Activity{
    private Spinner spinner1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity01);

        spinner1=(Spinner) findViewById(R.id.spinner1);

        initSpinner1();
    }
    public void initSpinner1(){
        String[] city=new String[]{"北京","上海","香港","澳门"};
        ArrayAdapter<String> adapter=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, city);
        spinner1.setAdapter(adapter);
    }
}

/SpinnerDemo/res/layout/activity01.xml

 <?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" >

     <Spinner
         android:id="@+id/spinner1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         />

 </LinearLayout>

三、注意点

1、android.R.layout.simple_spinner_dropdown_item

2、String[] city=new String[]{"北京","上海","香港","澳门"};  字符串使用