Android仿泡泡窗实现下拉菜单条实例代码

//让泡泡窗额度条目获取到焦点     popupWindow.setFocusable(true);     //设置背景图     popupWindow.setBackgroundDrawable(new BitmapDrawable());     popupWindow.setOutsideTouchable(true); 

<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:background="#22000000"   tools:context=".MainActivity" >   <RelativeLayout      android:layout_marginTop="40dp"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_centerHorizontal="true"     >   <EditText     android:id="@+id/et"     android:singleLine="true"     android:padding="40dp"     android:layout_width="300dp"     android:layout_height="40dp"     />   <ImageView      android:layout_width="wrap_content"     android:layout_height="40dp"     android:id="@+id/iv_select"     android:layout_centerVertical="true"     android:background="@drawable/ic_launcher"     android:layout_alignRight="@id/et"     />   </RelativeLayout> </RelativeLayout> 

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:layout_width="match_parent"   android:layout_height="match_parent"   android:padding="5dp"   android:orientation="horizontal" >   <TextView      android:layout_width="0dp"     android:layout_height="wrap_content"     android:drawableLeft="@drawable/ic_launcher"     android:gravity="center_vertical"     android:drawablePadding="3dp"     android:text="123"     android:id="@+id/tv_number"     android:layout_weight="1"     />   <ImageView      android:id="@+id/iv_delete"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:background="@drawable/ic_launcher"     /> </LinearLayout> 

package com.ldw.select; import java.util.ArrayList; import android.app.Activity; import android.graphics.drawable.BitmapDrawable; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.BaseAdapter; import android.widget.EditText; import android.widget.ImageView; import android.widget.ListView; import android.widget.PopupWindow; import android.widget.TextView; public class MainActivity extends Activity implements OnClickListener{   private ImageView iv_select;   private EditText et;   private ArrayList<String> list = new ArrayList<String>();   private TextView tv_number;   private ImageView iv_delete;   private ListView listView;   private PopupWindow popupWindow;   @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     initView();     initListener();      initData();   }   private void initView() {     setContentView(R.layout.activity_main);     iv_select = (ImageView) findViewById(R.id.iv_select);     et = (EditText) findViewById(R.id.et);   }   private void initListener() {     iv_select.setOnClickListener(this);   }   //集合中添加数据   private void initData() {     for(int i = 0; i< 20; i++){       list.add(1340000000 + i + "");     }     initListView();   }   //初始化列表   private void initListView(){     listView = new ListView(this);     //设置listView的背景图     listView.setBackgroundResource(R.drawable.ic_launcher);     //让listView的滚动条不可见     listView.setVerticalScrollBarEnabled(false);     MyAdapter adapter = new MyAdapter();     listView.setAdapter(adapter);     listView.setOnItemClickListener(new OnItemClickListener(){       @Override       public void onItemClick(AdapterView<?> parent, View view,           int position, long id) {         et.setText(list.get(position));         //关闭泡泡窗         popupWindow.dismiss();       }     });   }   //泡泡窗实现点击显示列表,泡泡窗默认是不获取焦点的   private void showNumberList(){     if(popupWindow == null){     //泡泡窗的填充,设置宽高     popupWindow = new PopupWindow(listView, et.getWidth(), 300);     }     //让泡泡窗额度条目获取到焦点     popupWindow.setFocusable(true);     //设置背景图     popupWindow.setBackgroundDrawable(new BitmapDrawable());     popupWindow.setOutsideTouchable(true);     //第一个参数是依附哪一个参数下,x轴，y轴的偏移量，相对于第一个参数的左下角的位置     popupWindow.showAsDropDown(et, 0, 0);   }   @Override   public void onClick(View v){     switch (v.getId()){       case R.id.iv_select:         //点击弹出列表         showNumberList();         break;     }   }   //listView填充   class MyAdapter extends BaseAdapter{     @Override     public int getCount() {       return list.size();     }     @Override     public Object getItem(int position) {       return null;     }     @Override     public long getItemId(int position) {       return 0;     }     @Override     public View getView(final int position, View convertView, ViewGroup parent) {       final View view = View.inflate(MainActivity.this, R.layout.item_list, null);       tv_number = (TextView) view.findViewById(R.id.tv_number);       iv_delete = (ImageView) view.findViewById(R.id.iv_delete);       tv_number.setText(list.get(position));       //删除按键       iv_delete.setOnClickListener(new OnClickListener(){         @Override         public void onClick(View v) {           //删除条目           list.remove(position);           //更新页面           notifyDataSetChanged();           //根据当前条目的个数设置，当前条目的高度           int listViewHeight = list.size() * view.getHeight();           if(listViewHeight > 300){             listViewHeight = 300;           }else{             listViewHeight = listViewHeight;           }           //更新泡泡窗的高度           popupWindow.update(et.getWidth(), listViewHeight);           //删除完了，泡泡窗小消失           if(list.size() == 0){             popupWindow.dismiss();             //下拉条消失             iv_select.setVisibility(View.GONE);           }         }       });       return view;     }   } }