Android 之 下拉框(Spinner)的运用

Android 之 下拉框(Spinner)的使用
参考:http://imshare.iteye.com/blog/770950
第一个下拉框是在java里面设定数据
第二个是在xml提供数据:res/values/arryas.xml
第三个 Spinner添加了OnItemSelectedListener事件，当单击下拉菜单后，将值带到上方的Text- View。上一个范例在new adapter时传入String数组，这次因为要添加及删除adapter，所以要传入的是ArrayList，否则，在添加删除时会出现错误。

<?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>

<?xml version="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" >    <TextView        android:id="@+id/spinnerText"        android:layout_width="fill_parent"        android:layout_height="wrap_content" >    </TextView>    <Spinner        android:id="@+id/Spinner01"        android:layout_width="fill_parent"        android:layout_height="wrap_content" >    </Spinner>        <Spinner        android:id="@+id/spinner02"        android:layout_width="fill_parent"        android:layout_height="wrap_content" >    </Spinner>        <Spinner        android:id="@+id/spinner03"        android:layout_width="fill_parent"        android:layout_height="wrap_content" >    </Spinner>    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="AddItem" />    <Button        android:id="@+id/button2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="RemoverItem" /></LinearLayout>

package com.pandy;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.AdapterView;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.Spinner;import android.widget.TextView;import android.widget.Toast;public class UI4Activity extends Activity {    /** Called when the activity is first created. */private static final String[] m={"A型","B型","O型","AB型","其他"};      private TextView view ;          private Spinner spinner;      private ArrayAdapter<String> adapter;          private Spinner spinner2;      private ArrayAdapter adapter2;          private Button button1;    private Button button2;        private static List<String> list;     private ArrayAdapter<String> adapter3;     private Spinner spinner3;         private int count = 1;        @Override      protected void onCreate(Bundle savedInstanceState) {          // TODO Auto-generated method stub          super.onCreate(savedInstanceState);          setContentView(R.layout.main);                    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(new SpinnerSelectedListener());          //设置默认值          spinner.setVisibility(View.VISIBLE);                                  spinner2 = (Spinner)findViewById(R.id.spinner02);        adapter2 = ArrayAdapter.createFromResource(this, R.array.plantes, android.R.layout.simple_spinner_item);        adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);        spinner2.setAdapter(adapter2);        spinner2.setOnItemSelectedListener(new SpinnerXMLSelectedListener());        spinner2.setVisibility(View.VISIBLE);                                list = new ArrayList<String>();        for(String s : getResources().getStringArray(R.array.plantes)){        list.add(s);        }        adapter3 = new ArrayAdapter(this,android.R.layout.simple_spinner_item,list);        adapter3.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);        spinner3 = (Spinner)findViewById(R.id.spinner03);        spinner3.setAdapter(adapter3);        spinner3.setVisibility(View.VISIBLE);                button1 = (Button)findViewById(R.id.button1);        button2 = (Button)findViewById(R.id.button2);        button1.setOnClickListener(new OnClickListener(){        @Override        public void onClick(View v) {        // TODO Auto-generated method stub        try {        adapter3.add("Add Item "+(count++));} catch (Exception e) {// TODO: handle exceptionToast.makeText(UI4Activity.this, "Error.", Toast.LENGTH_LONG).show();}        }        });        button2.setOnClickListener(new OnClickListener(){        @Override        public void onClick(View v) {        // TODO Auto-generated method stub        try {        adapter3.remove(spinner3.getSelectedItem().toString());} catch (Exception e) {// TODO: handle exceptionToast.makeText(UI4Activity.this, "Error.", Toast.LENGTH_LONG).show();}                }        });                              }            //使用数组形式操作      class SpinnerSelectedListener implements OnItemSelectedListener{            public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,                  long arg3) {              view.setText("你的血型是："+m[arg2]);          }          public void onNothingSelected(AdapterView<?> arg0) {          }      }     class SpinnerXMLSelectedListener implements OnItemSelectedListener{            public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,                    long arg3) {            view.setText("你使用什么样的手机："+adapter2.getItem(arg2));            }                public void onNothingSelected(AdapterView<?> arg0) {                            }                    } }