android 下拉列表

layout.xml

<?xmlversion="1.0"encoding="utf-8"?>

<LinearLayout

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

  android:layout_width="fill_parent"

  android:layout_height="fill_parent"

  android:orientation="vertical"

  >

  <TextViewandroid:id="@+id/spinnerText"

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"></TextView>

  <Spinnerandroid:id="@+id/Spinner01"

           android:layout_width="fill_parent"

           android:layout_height="wrap_content"></Spinner>

</LinearLayout>

java代码

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.TextView;

 

public class SpinnerActivity extendsActivity {

     

    privatestatic final String[] m={"A型","B型","O型","AB型","其他"};

    privateTextView view ;

    privateSpinner spinner;

    privateArrayAdapter<String> adapter;

    @Override

    protectedvoid onCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        super.onCreate(savedInstanceState);

        setContentView(R.layout.spinner);

         

        view = (TextView) findViewById(R.id.spinnerText);

        spinner = (Spinner) findViewById(R.id.Spinner01);

        //将可选内容与ArrayAdapter连接起来

        adapter =new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,m);

         

        //设置下拉列表的风格

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

         

        //将adapter 添加到spinner中

        spinner.setAdapter(adapter);

         

        //添加事件Spinner事件监听 

        spinner.setOnItemSelectedListener(newSpinnerSelectedListener());

         

        //设置默认值

        spinner.setVisibility(View.VISIBLE);

         

    }

     

    //使用数组形式操作

    classSpinnerSelectedListener implementsOnItemSelectedListener{

 

        publicvoid onItemSelected(AdapterView<?> arg0, View arg1,int arg2,

                longarg3) {

            view.setText("你的血型是："+m[arg2]);

        }

 

        publicvoid onNothingSelected(AdapterView<?> arg0) {

        }

    }

}