Android编程开发之Spinner控件用法实例分析

<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=".MainActivity" >  <Spinner   android:id="@+id/spinner1"   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:layout_alignParentLeft="true"   android:layout_alignParentTop="true" /> </RelativeLayout>

package com.example.lesson16_spinner; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.SimpleAdapter; import android.widget.Spinner; import android.widget.Toast; public class MainActivity extends Activity {  // 声明spinner对象  private Spinner spinner;  @Override  protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.activity_main);   spinner = (Spinner) findViewById(R.id.spinner1);   //使用数组作为数据源   final String arr[] = new String[] { "周一", "周二", "周三", "周四", "周五", "周六", "周七" };   // adpater对象   ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, arr);   List<Map<String, Object>> data = new ArrayList<Map<String, Object>>();  Map<String, Object> map = new HashMap<String, Object>();   map.put("logo", R.drawable.ic_launcher);   map.put("text", "xxxx说明操作");   Map<String, Object> map2 = new HashMap<String, Object>();   map2.put("logo", R.drawable.ic_launcher);   map2.put("text", "xxx说明xxx");   data.add(map);   data.add(map2);   SimpleAdapter simpleAdapter = new SimpleAdapter(this, data, R.layout.activity_item, new String[] { "logo", "text" }, new int[] { R.id.imageView1, R.id.textView1 });   // 设置显示的数据    spinner.setAdapter(arrayAdapter);   //spinner.setAdapter(simpleAdapter);   Toast.makeText(getApplicationContext(),"main Thread"+ spinner.getItemAtPosition(spinner.getSelectedItemPosition()), Toast.LENGTH_LONG).show();   // 注册事件   spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {    @Override    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {     // String content = arr[position];     Spinner spinner = (Spinner) parent;     Toast.makeText(getApplicationContext(), "xxxx" + spinner.getItemAtPosition(position), Toast.LENGTH_LONG).show();    }    @Override    public void onNothingSelected(AdapterView<?> parent) {     Toast.makeText(getApplicationContext(), "没有改变的处理", Toast.LENGTH_LONG).show();    }   });  }  @Override  public 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;  } }

<?xml version="1.0" encoding="utf-8"?> <resources>  <string-array name="plantes">   <item>NOKIA</item>   <item>MOTO</item>   <item>HTC</item>   <item>LG</item>   <item>其他</item>  </string-array> </resources>

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 extends Activity {  private TextView view2;  private Spinner spinner2;  private ArrayAdapter adapter2;  @Override  protected void onCreate(Bundle savedInstanceState) {   // TODO Auto-generated method stub   super.onCreate(savedInstanceState);   setContentView(R.layout.spinner);   spinner2 = (Spinner) findViewById(R.id.spinner02);   view2 = (TextView) findViewById(R.id.spinnerText02);   //将可选内容与ArrayAdapter连接起来   adapter2 = ArrayAdapter.createFromResource(this, R.array.plantes, android.R.layout.simple_spinner_item);   //设置下拉列表的风格   adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);   //将adapter2 添加到spinner中   spinner2.setAdapter(adapter2);   //添加事件Spinner事件监听   spinner2.setOnItemSelectedListener(new SpinnerXMLSelectedListener());  //设置默认值   spinner2.setVisibility(View.VISIBLE);  }  //使用XML形式操作  class SpinnerXMLSelectedListener implements OnItemSelectedListener{   public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {    view2.setText("你使用什么样的手机："+adapter2.getItem(arg2));   }   public void onNothingSelected(AdapterView<?> arg0) {   }  } }