本文實例講述了Android編程開發之Spinner組件用法。分享給大家供大家參考，具體如下：
Spinner組件組要用顯示一個下拉列表，在使用中需要用到適配器Adapter，下面是一個該組件的使用示例
首先是布局文件main.xml：
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <Spinner android:id="@+id/spinner1" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <Spinner android:id="@+id/spinner2" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginTop="20dp"/></LinearLayout>
由于用到simpAdapter所以要寫子項Item的布局如下 item.xml：
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content"> <ImageView android:id="@+id/ivLogo" android:layout_width="60dp" android:layout_height="60dp" android:src="@drawable/icon" android:paddingLeft="10dp" /> <TextView android:id="@+id/tvApplicationName" android:textColor="#000" android:layout_width="wrap_content" android:layout_height="fill_parent" android:textSize="16dp" android:gravity="center_vertical" android:paddingLeft="10dp" /> </LinearLayout>
下面是代碼：
import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import android.app.Activity; import android.app.AlertDialog; import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.SimpleAdapter; import android.widget.Spinner; import android.widget.AdapterView.OnItemSelectedListener; public class Main extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //獲取對象 Spinner spinner1 = (Spinner) findViewById(R.id.spinner1); String[] applicationNames = new String[] { "多功能日歷", "eoeMarket客戶端", "耐玩的重力消磚塊", "白社會", "程序終結者" }; ArrayAdapter<String> aaAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, applicationNames); // 將如下代碼可以使列表項帶RadioButton組件 // aaAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner1.setAdapter(aaAdapter); Spinner spinner2 = (Spinner) findViewById(R.id.spinner2); final List<Map<String, Object>> items = new ArrayList<Map<String, Object>>(); Map<String, Object> item1 = new HashMap<String, Object>(); item1.put("ivLogo", R.drawable.calendar); item1.put("tvApplicationName", "多功能日歷"); Map<String, Object> item2 = new HashMap<String, Object>(); item2.put("ivLogo", R.drawable.eoemarket); item2.put("tvApplicationName", "eoeMarket客戶端"); items.add(item1); items.add(item2); SimpleAdapter simpleAdapter = new SimpleAdapter(this, items, R.layout.item, new String[] { "ivLogo", "tvApplicationName" }, new int[] { R.id.ivLogo, R.id.tvApplicationName }); spinner2.setAdapter(simpleAdapter); //為Spinner2加上監聽事件 spinner2.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { new AlertDialog.Builder(view.getContext()).setTitle( items.get(position).get("tvApplicationName") .toString()).setIcon( Integer.parseInt(items.get(position).get("ivLogo") .toString())).show(); } @Override public void onNothingSelected(AdapterView<?> parent) { } }); } }希望本文所述對大家Android程序設計有所幫助。
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