<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <Spinner android:id="@+id/myspinner" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello_world" /> </RelativeLayout>
主程序入口
package com.sun.spinner; 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.Toast; public class MainActivity extends Activity { // 显示的条目内容 private static final String[] m_arr = { "第一组", "第二组", "第三组" }; // 程序入口 public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); spinner(); } // spinner 效果实现 public void spinner(){ Spinner spinner = (Spinner) findViewById(R.id.myspinner); spinner.setPrompt("请选择颜色"); // 提示标题 // 使用数组适配器进行填充 ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.spinnercolor, android.R.layout.simple_spinner_item); //ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_spinner_item,m_arr); // 下拉的样式 adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner.setAdapter(adapter); spinner.setSelection(0, true); // 默认选择 -- 第一项 spinner.performClick(); //它被定义就调用此视图的OnClickListener(译者注:例如可以在加载时默认弹出下拉列表) spinner.setOnItemSelectedListener(new OnItemSelectedListener() { public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { Toast.makeText(MainActivity.this, "选择了:"+getResources().getStringArray(R.array.spinnercolor)[arg2],1000).show(); } @Override public void onNothingSelected(AdapterView<?> arg0) { // TODO Auto-generated method stub } }); } }