Android自带的下拉列表控件功能已经十分强大，但是看起来并不是十分美观，所以用Android的其它控件实现了一个定义的下拉菜单控件，看起来还可以，下面直接贴代码，相信都看得明白！

主界面activity:

package com.grus;import android.app.Activity;import android.graphics.drawable.BitmapDrawable;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.Button;import android.widget.EditText;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.RelativeLayout;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;import android.widget.LinearLayout.LayoutParams;import android.widget.ListView;import android.widget.PopupWindow;//主界面Activitypublic class SelectActivity extends Activity {// 下拉框依附组件private RelativeLayout parent;// 下拉框依附组件宽度，也将作为下拉框的宽度private int pwidth;// 文本框private EditText et, et1;// 下拉箭头图片组件private ImageView image, image1;// 展示所有下拉选项的ListViewprivate ListView listView = null;private String str1[] = { "北京", "上海", "广州" };private String str2[] = { "多媒体播放", "HDMI 1950*780", "北京高视" };// PopupWindow对象private PopupWindow selectPopupWindow = null;private OptionsAdapter optionsAdapter = null;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.select);}@Overridepublic void onWindowFocusChanged(boolean hasFocus) {super.onWindowFocusChanged(hasFocus);initWedget();}/** * 初始化界面控件 */private void initWedget() {// 初始化界面组件parent = (RelativeLayout) findViewById(R.id.parent);et = (EditText) findViewById(R.id.edittext);et1 = (EditText) findViewById(R.id.edittext1);et.setFocusable(false);// 禁止编辑框被编辑et1.setFocusable(false);// 禁止编辑框被编辑image = (ImageView) findViewById(R.id.btn_select);image1 = (ImageView) findViewById(R.id.btn_select1);// 获取下拉框依附的组件宽度pwidth = parent.getWidth();// 设置点击下拉箭头图片事件，点击弹出PopupWindow浮动下拉框image.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {initPopuWindow(et, str1);popupWindwShowing(et);}});image1.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// 初始化PopupWindowinitPopuWindow(et1, str2);// 显示PopupWindow窗口popupWindwShowing(et1);}});}/** * 初始化PopupWindow */private void initPopuWindow(final EditText et, final String str[]) {View loginwindow = (View) this.getLayoutInflater().inflate(R.layout.options, null);listView = (ListView) loginwindow.findViewById(R.id.list);// 设置自定义AdapteroptionsAdapter = new OptionsAdapter(this, str);listView.setAdapter(optionsAdapter);listView.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> arg0, View v, int position,long arg3) {et.setText(str[position]);selectPopupWindow.dismiss();}});selectPopupWindow = new PopupWindow(loginwindow, pwidth,LayoutParams.WRAP_CONTENT, true);selectPopupWindow.setOutsideTouchable(true);//当点击屏幕其他部分及Back键时PopupWindow消失selectPopupWindow.setBackgroundDrawable(new BitmapDrawable());}public void popupWindwShowing(View view) {selectPopupWindow.showAsDropDown(view, 0, -1);}}
自定义适配器： 

package com.grus;import java.util.ArrayList;import android.app.Activity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;//自定义适配器Adapterpublic class OptionsAdapter extends BaseAdapter {    private Activity activity = null;     private String str[];    public OptionsAdapter(Activity activity,String str[]){    this.activity = activity;    this.str = str;    }@Overridepublic int getCount() {return str.length;}@Overridepublic Object getItem(int position) {return str[position];}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(final int position, View convertView, ViewGroup parent) {ViewHolder holder = null;         if (convertView == null) {             holder = new ViewHolder();             //下拉项布局            convertView = LayoutInflater.from(activity).inflate(R.layout.option_item, null);             holder.textView = (TextView) convertView.findViewById(R.id.item_text);             convertView.setTag(holder);         } else {             holder = (ViewHolder) convertView.getTag();         }          holder.textView.setText(str[position]);                      return convertView; }}class ViewHolder {     TextView textView; }


布局XML文件：

select.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"    android:background="#EEEED1"    ><RelativeLayout android:id="@+id/parent" android:layout_width="wrap_content" android:layout_height="wrap_content"   android:layout_marginTop="50dp" android:layout_marginLeft="30dp"><EditText android:id="@+id/edittext" android:layout_width="200dp"  android:singleLine="true"    android:layout_height="40dp" android:background="@color/green" android:paddingLeft="3dp"/><ImageView android:id="@+id/btn_select" android:layout_width="30dp" android:layout_height="40dp" android:src="@drawable/select" android:scaleType="fitXY" android:background="@color/green"android:layout_toRightOf="@id/edittext"/><EditText android:id="@+id/edittext1" android:layout_width="200dp"  android:singleLine="true"    android:layout_height="40dp" android:background="@color/green" android:paddingLeft="3dp"    android:layout_below="@id/edittext" android:layout_alignLeft="@id/edittext"    android:layout_marginTop="30dp"/><ImageView android:id="@+id/btn_select1" android:layout_width="30dp" android:layout_height="40dp" android:src="@drawable/select" android:scaleType="fitXY" android:background="@color/green"android:layout_toRightOf="@id/edittext1" android:layout_marginTop="30dp"android:layout_below="@id/edittext"/></RelativeLayout></LinearLayout>
option_item.xml: 

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:background="#ffffff"    ><RelativeLayout    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:gravity="center_vertical"    android:minHeight="40dp"    ><TextView android:id="@+id/item_text"      android:layout_height="wrap_content"android:layout_width="fill_parent"android:paddingLeft="5dp" android:layout_alignParentLeft="true"></TextView></RelativeLayout></LinearLayout>
options.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="wrap_content"    android:gravity="center_horizontal"    ><ListView android:id="@+id/list" android:layout_width="fill_parent"    android:layout_height="wrap_content" android:cacheColorHint="#00000000"></ListView></LinearLayout>
效果图如下：
  
  
  

 
  

 
  

 
  

 
  

 
  

 
  

 
  

 
  

 
  

 
  

 
  

 
  

 
  

 








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