Use of Android Actionbar

 action Bar main features include:
  1. Display the Options menu
  2. Provide navigation function for the switch mode of the tab page, Multiple fragment.  can be toggled,
  3.  provides a drop-down navigation entry.
  4. Provides an interactive active view instead of an option entry  
  5. Use the program's icon to return to the home screen or navigate up.

First of all, when using overflow, you need to call the following method in the OnCreate () function:

private void Forceshowoverflowmenu () {      try {          viewconfiguration config = viewconfiguration.get (this);          Field Menukeyfield = Viewconfiguration.class                  . Getdeclaredfield ("Shaspermanentmenukey");          if (Menukeyfield! = null) {              menukeyfield.setaccessible (true);              Menukeyfield.setboolean (config, false);          }      } catch (Exception e) {          e.printstacktrace ();      }  }

Note: This implementation is not used here, and the popupmen used in this application

The following are the Actionbar used by the projects you develop:

public class Shoporderactivity extends Actionbaractivity Implementsontouchlistener, onmenuitemclicklistener{private Toast mtoast;private Context context;/** alertdialog input Feedback box */private EditText et_feedback;private popupmenu popupmenu;@ overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview ( R.layout.shop_order);//Set Home icon area//requestwindowfeature (Window.feature_left_icon);//setfeaturedrawableresource (Window.feature_left_icon, resId); this.context = This;mtoast = Toast.maketext (This, "", Toast.length_long); Initactionbar ();} @Overridepublic boolean Oncreateoptionsmenu (Menu menu) {//Inflate the menu; This adds items to the action bar if it is PR Esent.getmenuinflater (). Inflate (R.menu.actionbar_menu, menu); return true;} @Overridepublic boolean onoptionsitemselected (MenuItem Item) {//Handle Action Bar item clicks here. The action bar will//automatically handle clicks on the Home/up button so long//as you specify a parent activity in and RoIdManifest.xml.int id = item.getitemid (), if (id = = R.id.actionbar_overflow) {if (PopupMenu = = null) {PopupMenu = new Popup Menu (This,findviewbyid (r.id.actionbar_overflow));p opupmenu.inflate (R.menu.actionbar_pop); Popupmenu.setonmenuitemclicklistener (this);} Popupmenu.show (); return true;} else if (<pre name= "code" class= "Java" >public class Shoporderactivity extends Actionbaractivity Implementsontouchlistener, onmenuitemclicklistener{private Toast mtoast;private Context context;/** Alertdialog Input Feedback box */private EditText et_feedback;private popupmenu popupmenu; @Overrideprotected void OnCreate (Bundle Savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (r.layout.shop_order);//Set Home icon Area// Requestwindowfeature (Window.feature_left_icon);//setfeaturedrawableresource (Window.feature_left_icon, resId); This.context = This;mtoast = Toast.maketext (This, "", Toast.length_long); Initactionbar ();} @Overridepublic boolean Oncreateoptionsmenu (Menu menu) {//Inflate the menu; this adds iteMs to the action Bar if it is present.getmenuinflater (). Inflate (R.menu.actionbar_menu, menu); return true;} @Overridepublic boolean onoptionsitemselected (MenuItem Item) {//Handle Action Bar item clicks here. The action bar will//automatically handle clicks on the Home/up button so long//as you specify a parent activity in and RoidManifest.xml.int id = item.getitemid (), if (id = = R.id.actionbar_overflow) {if (PopupMenu = = null) {PopupMenu = new Pop Upmenu (This,findviewbyid (r.id.actionbar_overflow));p opupmenu.inflate (R.menu.actionbar_pop); Popupmenu.setonmenuitemclicklistener (this);} Popupmenu.show (); return true;} else if (id = = Android. R.id.home) {finish ();} else if (id = = R.id.new_order_bar) {showtip ("Show Red dots");} return super.onoptionsitemselected (item);} @Overridepublic boolean Onmenuitemclick (MenuItem arg0) {Intent intent;switch (Arg0.getitemid ()) {case R.id.actionbar_ Settings:intent = new Intent (this, settingsactivity.class); startactivity (intent); Break;case R.id.historyorder: Intent = new INtent (this, historyorderactivity.class); startactivity (intent); Break;case R.id.logout:alertdialog.builder Builder = New Alertdialog.builder (Shoporderactivity.this); Builder.settitle ("OK to exit?"). Builder.setpositivebutton ("OK", new Dialoginterface.onclicklistener () {@Overridepublic void OnClick ( Dialoginterface dialog, int which) {Showtip ("Log out! ");}}); Builder.setnegativebutton ("Cancel", new Dialoginterface.onclicklistener () {@Overridepublic void OnClick (dialoginterface dialog, int which) {Dialog.dismiss ();}}); Builder.create (). Show (); break;} return false;} /** * Initialize ActionBar */private void Initactionbar () {ActionBar ActionBar = Getsupportactionbar (); Actionbar.settitle ("Grab order") ; actionbar.setdisplayhomeasupenabled (true); actionbar.sethomebuttonenabled (true);//Actionbar.seticon ( R.drawable.back_menu);//drawable background = (drawable) getresources ()//. Getdrawable (R.DRAWABLE.TOP_BG);// Getactionbar (). setbackgrounddrawable (background); Settitlecolor (This.getresources (). GetColor (R.color.green));// No response}/** *Show Toast * * @param str */public void Showtip (Final String str) {runonuithread (new Runnable () {@Overridepublic void run () { Mtoast.settext (str); Mtoast.show ();});}

}

id = = Android. R.id.home

The function that is implemented when the icon in the upper-left corner of the operation is returned, the configuration checklist needs to be set:

<activity
Android:name= "Com.shop.order.ShopOrderActivity"
Android:launchmode= "Singletop"
Android:theme= "@style/theme.appcompat.light.darkactionbar" >
</activity>

Actionbar_menu's Code:

<?xml version= "1.0" encoding= "Utf-8"? ><menu xmlns:android= "Http://schemas.android.com/apk/res/android"    xmlns:app= "Http://schemas.android.com/apk/res-auto" >        <item        android:id= "@+id/new_order_bar"        android:title= "@string/new_order"        android:icon= "@drawable/ic_launcher"        app:showasaction= "ifroom| Withtext "/>        <item        android:id=" @+id/actionbar_overflow "        android:icon=" @drawable/abc_ic_menu_ Moreoverflow_normal_holo_dark "        android:title=" @string/pop "        app:showasaction=" Ifroom|withtext "/> </menu>

Note : app:showasaction= "Ifroom|withtext" is not displayed in Actionbar if written android:showasaction= "Ifroom|withtext" When you manipulate the menu key in the lower-right corner of your phone

Actionbar_pop's Code:

<?xml version= "1.0" encoding= "Utf-8"? ><menu xmlns:android= "Http://schemas.android.com/apk/res/android" >    <item        android:id= "@+id/actionbar_settings"        android:title= "@string/settings"/>    < Item        android:id= "@+id/historyorder"        android:title= "@string/historyorder"/>    <item        android : id= "@+id/logout"        android:title= "@string/logout"/></menu>