微调控件Spinner

来源：互联网发布：勤哲软件编辑：程序博客网时间：2024/04/30 06:45

/*activity_main.xml*/

<pre name="code" class="html"><RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.mrwang.spinnerdemo.MainActivity" >    <TextView        android:id="@+id/tvShow"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center"        android:text="@string/hello_world" />    <Spinner         android:layout_below="@id/tvShow"        android:id="@+id/spinner"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:spinnerMode="dialog"<span style="white-space:pre"></span><span style="color:#ff0000;">//下拉方式有两种 ：dialog、Dropdown</span>        /></RelativeLayout>

/*

*MainActivity.java;

/*

package com.mrwang.spinnerdemo;import java.util.ArrayList;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.TextView;public class MainActivity extends Activity {TextView tvShow;Spinner spinner;ArrayList<String> dataList;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);tvShow=(TextView)findViewById(R.id.tvShow);spinner=(Spinner)findViewById(R.id.spinner);dataList=new ArrayList<String>();dataList.add("AAA");dataList.add("BBB");dataList.add("CCC");ArrayAdapter<String> adapter=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,android.R.id.text1,dataList);spinner.setAdapter(adapter);spinner.setOnItemSelectedListener(new Listener());}class Listener implements AdapterView.OnItemSelectedListener{<span style="white-space:pre"></span><span style="color:#ff0000;">//Spinner中的选择触发的是onItemSelect事件，不是onClick</span>@Overridepublic void onItemSelected(AdapterView<?> parent, View view,int position, long id) {// TODO Auto-generated method stubtvShow.setText(dataList.get(position));}@Overridepublic void onNothingSelected(AdapterView<?> parent) {// TODO Auto-generated method stub}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId();if (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}}

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