参考:http://imshare.iteye.com/blog/770950
获得被选中的选项的文本，Index, ID
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String value = spinner.getSelectedItem().toString(); int index = spinner.getSelectedItemPosition(); long id = spinner.getSelectedItemId(); |
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。
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<?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> |
main.xml
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<?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> |
java代码：
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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 exception Toast.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 exception Toast.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) { } } } |
