Android Implementation pop-up menu effect when long press QQ list

This is just a simple principle, simple function, interested readers can optimize their own changes

Layout file

<?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:orientation= "vertical"   >    <listview        android:id= "@+id/data_ List "        android:layout_width=" Match_parent "         android:divider= "@android: Color/black"          android:dividerheight= "0.65dip"         android:layout_height= " Wrap_content " >    </ListView>    <LinearLayout          android:layout_width= "Match_parent"          android:layout_height= "Wrap_content"         android:id= "@+id/data_empty_li"          android:orientation= "Vertical"          android:gravity= "Center"         >                  <ImageView             android:layout_margintop= "100dip"          android:id= "@+id/imageview1"          android:layout_width= "Wrap_content"         android:layout_height = "Wrap_content"         android:src= "@drawable/ic_launcher"  />     <textview        android:id= "@+id/textView1 "    &nbSp;   android:layout_width= "Wrap_content"          android:layout_height= "Wrap_content"         android:layout_margintop= " 20dip "        android:text=" Click to refresh " />             </linearlayout></linearlayout >

Key Code

Public class windowtipactivity  extends activity implements onclicklistener , onitemlongclicklistener, ontouchlistener{private listview mlistview;private  viewgroup mnodatapanel;private final list<string> datalist = new  Arraylist<string> ();p rivate point praw = new point () @Overrideprotected   Void oncreate (bundle savedinstancestate)  {super.oncreate (savedinstancestate); SetContentView ( R.layout.wintip_list_layout);mlistview =  (ListView)  findviewbyid (r.id.data_list); MNoDataPanel  =  (ViewGroup)  findviewbyid (R.id.data_empty_li); Mlistview.setadapter (new arrayadapter< String> (this,android. r.layout.simple_list_item_1 , datalist)); Mlistview.setemptyview (Mnodatapanel); Mnodatapanel.setonclicklistener (This), Mlistview.setonitemlongclicklistener (this); Mlistview.setontouchlistener ( this);} @Overrideprotected &NBsp;void ondestroy ()  {super.ondestroy ();} @Overridepublic  void onclick (view arg0) {if (Datalist.size () >=20) {return;} for  (int i = 1; i <=20; i++)  {datalist.add ("menu-option (" +i+ ")");} arrayadapter adapter =  (Arrayadapter)  mlistview.getadapter (); Adapter.notifyDataSetChanged ( );} @Overridepublic  boolean onitemlongclick (adapterview<?> parent, view v, int  position,long itemid) {    linearlayout layout = new  LinearLayout (this);      layout.setgravity (Gravity.center);         layout.setbackgroundcolor (Color.gray);           textview tv = new textview (This);           tv.setlayoutparams (New layoutparams (LAYOUTPARAMS.WRAP_CONTENT,&NBSP;LAYOUTPARAMS.WRap_content));           tv.settext (DataList.get (position));           tv.settextcolor (Color.WHITE);         tv.setsingleline (True);         Layout.addview (TV);                   paint p = new paint (Paint.anti_alias_flag);                 popupwindow popupwindow =  new popupwindow (Layout,200,v.getheight ());                     popupwindow.setfocusable (True);           popupwindow.setoutsidetouchable (True);           pOpupwindow.setbackgrounddrawable (New bitmapdrawable ());                     int[] location = new  int[2];          v.getlocationonscreen (location);                      popupwindow.showatlocation (V, gravity.no_gravity,parent.getwidth ()/2-100 , location [1]-popupwindow.getheight ());           return false;} @Overridepublic  boolean ontouch (view v, motionevent event) {if (event.getaction () = = Motionevent.action_down) {int x =  (int)  event.getrawx ();int y =  (int)   Event.getrawy ();p raw.set (x, y); LOG.D ("OnTouch",  "x=" +x+ " , y=" +y);} Return false;}}

The effect is as follows

Android Implementation pop-up menu effect when long press QQ list