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  • Android-Spinner下拉列表Demo

    代码

    package com.lxt008;
    
    import com.lxt008.R;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.AdapterView;
    import android.widget.ArrayAdapter;
    import android.widget.Spinner;
    import android.widget.TextView;
    
    public class Activity01 extends Activity
    {
        private static final String[]    m_Countries    = { "O型", "A型", "B型", "AB型", "其他" };
    
        private TextView                m_TextView;
        private Spinner                    m_Spinner;
        private ArrayAdapter<String>    adapter;
    
    
        /** Called when the activity is first created. */
        @Override
        public void onCreate(Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
    
            m_TextView = (TextView) findViewById(R.id.TextView1);
            m_Spinner = (Spinner) findViewById(R.id.Spinner1);
    
            //将可选内容与ArrayAdapter连接
            adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, m_Countries);
    
            //设置下拉列表的风格
            adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            
            //将adapter添加到m_Spinner中
            m_Spinner.setAdapter(adapter);
    
            //添加Spinner事件监听
            m_Spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener() {
    
                @Override
                public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3)
                {
                    m_TextView.setText("你的血型是:" + m_Countries[arg2]);
                    //设置显示当前选择的项
                    arg0.setVisibility(View.VISIBLE);
                }
    
                @Override
                public void onNothingSelected(AdapterView<?> arg0)
                {
                    // TODO Auto-generated method stub
                }
    
            });
        }
    }

    布局文件

    <?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/TextView1"
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="@string/hello"
        />
    <Spinner
      android:id="@+id/Spinner1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
    />
    </LinearLayout>
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  • 原文地址:https://www.cnblogs.com/spadd/p/4189892.html
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