android--Sliding Menu

Drawerlayout is a layout with two child controls, the first child control is what is displayed in the home screen, and the second child control is what is displayed in the slide menu:

1 <Android.support.v4.widget.DrawerLayout2     xmlns:android= "Http://schemas.android.com/apk/res/android"3 Xmlns:app= "Http://schemas.android.com/apk/res-auto"4 Android:id= "@+id/drawer_layout"5 Android:layout_width= "Match_parent"6 Android:layout_height= "Match_parent"7     >8 9     <FramelayoutTen         Android:layout_width= "Match_parent" One Android:layout_height= "Match_parent"> A  -         <Android.support.v7.widget.Toolbar -             Android:id= "@+id/toolbar" the Android:layout_width= "Match_parent" - Android:layout_height= "? Attr/actionbarsize" - Android:background= "? Attr/colorprimary" - Android:theme= "@style/themeoverlay.appcompat.dark.actionbar" + App:popuptheme= "@style/themeoverlay.appcompat.light"/> -  +     </Framelayout> A     <TextView at         Android:layout_width= "Match_parent" - Android:layout_height= "Match_parent" - android:layout_gravity= "Start" - Android:text= "This is a menu" - android:textsize= "30SP" - Android:background= "#FFF"/> in </Android.support.v4.widget.DrawerLayout>

Note that the Layout_gravity property of the second child control TextView Specifies whether the sliding menu is on the left or the right side of the screen, and the property value is in the same place, using the start expression to determine the system language.

The effect here is this:

Then in the title bar to add a navigation button, click the Navigation button can also open the sliding menu, the implementation principle is that the title bar to the left there is a button called Homeasup, its default icon is a return arrow, meaning is to return to the previous activity, so only need to show it out, Modify its icon and click events.

Specific Java code:

1  Public classMainactivityextendsappcompatactivity {2 3     Privatedrawerlayout mdrawerlayout;4 @Override5     protected voidonCreate (Bundle savedinstancestate) {6         Super. OnCreate (savedinstancestate);7 Setcontentview (r.layout.activity_main);8Toolbar Toolbar =(Toolbar) Findviewbyid (R.id.toolbar);9 Setsupportactionbar (toolbar);TenMdrawerlayout =(drawerlayout) Findviewbyid (r.id.drawer_layout); OneActionBar ActionBar =Getsupportactionbar (); A         if(ActionBar! =NULL){ -             //let Actionbar's Homeasup button show up . -Actionbar.setdisplayhomeasupenabled (true); the             //Change the icon of the Homeasup button - Actionbar.sethomeasupindicator (r.drawable.ic_action_name); -         } -  +     } -     ... +      Public Booleanonoptionsitemselected (MenuItem item) { A         Switch(Item.getitemid ()) { at              CaseAndroid. R.id.home: - Mdrawerlayout.opendrawer (gravitycompat.start); -                  Break; -     ... -             default: -                  Break; in         } -         return true; to     } +}

android--Sliding Menu