Android如何实现Spinner下拉列表效果

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一、以数组作为数据源

这种实现方式比较简单，先上效果图：

xml文件代码;

MainActivity文件代码：

package com.kiritor.ui_spinner;  import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.View; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Spinner; import android.widget.TextView;  public class MainActivity extends Activity {    private TextView result = null;   private Spinner spinner = null;   private ArrayAdapter adapter = null;   private static final String [] langurage ={"机器语言","汇编","c语言","c++语言","java语言"};   @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);     result = (TextView)findViewById(R.id.result);     spinner = (Spinner)findViewById(R.id.spinner);     adapter = new ArrayAdapter(this,android.R.layout.simple_spinner_item,langurage);     //设置下拉列表风格     adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);     //将适配器添加到spinner中去     spinner.setAdapter(adapter);     spinner.setVisibility(View.VISIBLE);//设置默认显示     spinner.setOnItemSelectedListener(new OnItemSelectedListener() {     @Override     public void onItemSelected(AdapterView arg0, View arg1,         int arg2, long arg3) {       // TODO Auto-generated method stub       result.setText("你的选择是："+((TextView)arg1).getText());                   }     @Override       public void onNothingSelected(AdapterView arg0) {         // TODO Auto-generated method stub                }     });        }    @Override   public boolean onCreateOptionsMenu(Menu menu) {     // Inflate the menu; this adds items to the action bar if it is present.     getMenuInflater().inflate(R.menu.main, menu);     return true;   }  }

二、以xml文件作为数据源

先上效果图吧：

数据源xml文件：

         机器语言     汇编语言     c语言     c++语言     java语言     Android学习    

xml文件：

MainActivity

package com.kiritor.ui_spinner;  import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.View; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Spinner; import android.widget.TextView;  public class MainActivity extends Activity {    private TextView result = null;   private Spinner spinner = null;   private ArrayAdapter adapter = null;      @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);     result = (TextView)findViewById(R.id.result);     spinner = (Spinner)findViewById(R.id.spinner);     adapter = ArrayAdapter.createFromResource(this,R.array.langurage,android.R.layout.simple_spinner_item);     //设置下拉列表风格     adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);     //将适配器添加到spinner中去     spinner.setAdapter(adapter);     spinner.setVisibility(View.VISIBLE);     spinner.setOnItemSelectedListener(new OnItemSelectedListener() {     @Override     public void onItemSelected(AdapterView arg0, View arg1,         int arg2, long arg3) {       // TODO Auto-generated method stub       result.setText("你的选择是："+((TextView)arg1).getText());                   }     @Override       public void onNothingSelected(AdapterView arg0) {         // TODO Auto-generated method stub                }     });        }    @Override   public boolean onCreateOptionsMenu(Menu menu) {     // Inflate the menu; this adds items to the action bar if it is present.     getMenuInflater().inflate(R.menu.main, menu);     return true;   }  }

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