Android uses Popupwindow to implement a group information example for Sina Weibo _android

Sina Weibo has recently seen the top of the micro-blog group effect is very cool, from the Internet to check some data to understand that the original is implemented with Popupwindow, today I also wrote an example to achieve this effect, I hope to help.

Popupwindow is what a pop-up window means, like the Start button under Windows. Popupwindow can achieve a floating-layer effect, and can customize the display location, appearance and exit animation.

The effect is as follows:

Realize the idea:

In a popupwindow to put a ListView, so as to achieve the implementation of packet information!

Specific main implementation code:
Group_list.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:layout_margin=" 0.0px " android:background= "@drawable/group_bg" android:orientation= "vertical" android:paddingleft= "0.0SP" Android:paddin gright= "0.0SP" > <textview android:id= "@+id/groupall" style= "@style/grouplist_item_textview" and Roid:layout_width= "Fill_parent" android:layout_height= "@dimen/group_item_height" android:background= "@drawable/g ROUPLIST_FIXED_ITEM_BG "android:gravity=" center "android:text=" all "/> <imageview android:id=" @+i D/iv_group_list_bg_divider "android:layout_width=" fill_parent "android:layout_height=" Wrap_content "Android : layout_margin= "0.0px" android:background= "@drawable/group_divider" android:padding= "0.0px"/> <listv Iew android:id= "@+id/lvgrouP "android:layout_width=" Fill_parent "android:layout_height=" fill_parent "android:layout_weight=" 0.0 " 
    Android:cachecolorhint= "#00000000" android:divider= "@drawable/group_divider" android:dividerheight= "2.0px" Android:drawselectorontop= "true" android:fadingedgelength= "0.0sp" android:listselector= "@drawable/grouplist_item 
 _bg "/> </LinearLayout>

Group_item_view.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=" "@dimen/group_item_height" 
  android:orientation= "vertical" > 
 
  <textview 
    android:id= "@+id/groupitem" 
    @style Grouplist_item_textview " 
    android:layout_width=" fill_parent " 
    android:layout_height=" Fill_parent 
    " android:gravity= "center"/> 
 
</LinearLayout> 

The code in the activity:

Package Com.jiahui.popwindow; 
Import java.util.ArrayList; 
 
Import java.util.List; 
 
Import Com.jiahui.adapter.GroupAdapter; 
Import android.app.Activity; 
Import Android.content.Context; 
Import android.graphics.drawable.BitmapDrawable; 
Import Android.os.Bundle; 
Import Android.util.Log; 
Import Android.view.LayoutInflater; 
Import Android.view.View; 
Import Android.view.WindowManager; 
Import Android.widget.AdapterView; 
Import Android.widget.AdapterView.OnItemClickListener; 
Import Android.widget.ArrayAdapter; 
Import Android.widget.Button; 
Import Android.widget.ListView; 
Import Android.widget.PopupWindow; 
Import Android.widget.TextView; 
 
Import Android.widget.Toast; 
 
  public class Poupwindowdemoactivity extends activity {private Popupwindow Popupwindow; 
 
  Private ListView Lv_group; 
 
  Private view view; 
 
  Private View Top_title; 
 
  Private TextView Tvtitle; 
 
  Private list<string> groups; 
   public void OnCreate (Bundle savedinstancestate) { Super.oncreate (savedinstancestate); 
 
    Setcontentview (R.layout.main); 
 
    Top_title = This.findviewbyid (R.id.top_title); 
 
    Tvtitle = (TextView) Top_title.findviewbyid (r.id.tvtitle); 
 
    Tvtitle.settext ("To be a low-key farmer"); Tvtitle.setonclicklistener (New View.onclicklistener () {@Override public void OnClick (View v) {s 
      Howwindow (v); 
 
  } 
    }); /** * Show * @param parent/private void ShowWindow (View parent) {if Popupwindow = n 
 
      ull) {Layoutinflater layoutinflater = (layoutinflater) getsystemservice (Context.layout_inflater_service); 
 
      View = Layoutinflater.inflate (r.layout.group_list, NULL); 
      Lv_group = (ListView) View.findviewbyid (R.id.lvgroup); 
      Load Data groups = new arraylist<string> (); 
      Groups.add ("my Microblog"); 
      Groups.add ("friend"); 
      Groups.add ("relatives"); 
 
      Groups.add ("Stranger"); 
   Groupadapter groupadapter = new Groupadapter (this, groups);   Lv_group.setadapter (Groupadapter); 
    Create a Popuwidow object Popupwindow = new Popupwindow (view, 200, 250); 
    //Make it clustered popupwindow.setfocusable (true); 
 
    Set to allow Popupwindow.setoutsidetouchable to disappear (true); 
    This is to click "Back" to make it disappear, and it will not affect your background popupwindow.setbackgrounddrawable (new bitmapdrawable ()); 
    WindowManager WindowManager = (windowmanager) getsystemservice (Context.window_service); The position shown is: Half of the width of the screen-popupwindow half of the height of the int xpos = Windowmanager.getdefaultdisplay (). GetWidth ()/2-popupwind 
 
    Ow.getwidth ()/2;  LOG.I ("Coder", "Windowmanager.getdefaultdisplay (). GetWidth ()/2:" + Windowmanager.getdefaultdisplay (). GetWidth ()/ 
    2); 
 
    LOG.I ("Coder", "popupwindow.getwidth ()/2:" + popupwindow.getwidth ()/2); 
 
    LOG.I ("Coder", "xpos:" + xpos); 
 
    Popupwindow.showasdropdown (parent, xpos, 0); Lv_group.setonitemclicklistener (New Onitemclicklistener () {@Override public voiD Onitemclick (adapterview<?> adapterview, view view, int position, long id) {Toast.maketext (P 
 
        Oupwindowdemoactivity.this, "groups.get (position)" + groups.get (position), 1000). Show (); 
        if (Popupwindow!= null) {Popupwindow.dismiss (); 
  } 
      } 
    }); 
 } 
}

The above is the entire content of this article, I hope to help you learn, but also hope that we support the cloud habitat community.