Android Spinner实例

如果你是只能手机，大家可以来这里先来了解以下Android系统，作为参考。

／／SpinnerDemo.java:  
package com.cci.SpinnerDemo;  
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 SpinnerDemo extends Activity {  
    TextView tv;  
    /** Called when the activity is first created. */  
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
          
        tv=(TextView)findViewById(R.id.mytxt);  
          
        ArrayAdapter<String>  adapter = new ArrayAdapter<String>(  
                this,android.R.layout.simple_spinner_item);  
        adapter.setDropDownViewResource(  
                android.R.layout.simple_spinner_dropdown_item);  
          
        //随便写什么东西  
        adapter.add("red");  
        adapter.add("green");  
        adapter.add("blue");  
        Spinner spinner = (Spinner) findViewById(R.id.myspinner);  
        spinner.setAdapter(adapter);  
        spinner.setOnItemSelectedListener(new OnItemSelectedListener() {  
            public void onItemSelected(AdapterView<?> parent,  
                View view,int position,long id) {  
                Spinner spinner = (Spinner) parent;  
                tv.setText(spinner.getSelectedItem().toString());  
                //Log.v("Test", "id = " + id + "("  
                //+ spinner.getSelectedItem().toString() + ")");  
                }  
            public void onNothingSelected(AdapterView<?> parent) {  
            }  
                  
        });  
    }  
}  
 
<!--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" 
    > 
<TextView    
    android:id="@+id/mytxt" 
    android:layout_width="fill_parent"   
    android:layout_height="wrap_content"   
    android:text="@string/hello" 
    /> 
<Spinner   
    android:id="@+id/myspinner" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    ></Spinner> 
</LinearLayout> 

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