Android Note: Use of drawerlayout drawer layouts

Drawerlayout (drawer layout), often appearing in various apps, such as CSDN.

Points:

1. When using Drawerlayout, in the XML layout, put the layout of the main interface in front, then put the layout contents of the drawer behind

2. Remember to add android:layout_gravity= "left" or "start" to the layout in the drawer to indicate which side the drawer appears on.

The code looks like this:

Activity_drawer.xml

<Relativelayoutxmlns: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.support.v4.widget.DrawerLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Android:id= "@+id/drawer_layout"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent" >        <!--The layout of the main interface must be placed in front of the drawer -        <FramelayoutAndroid:id= "@+id/content_frame"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent" />        <!--contents of Drawer -        <ListViewAndroid:id= "@+id/left_drawer"Android:layout_width= "240DP"Android:layout_height= "Match_parent"android:layout_gravity= "Left"Android:background= "#ffffff"Android:choicemode= "Singlechoice"Android:divider= "@android: Color/transparent"Android:dividerheight= "1DP" />    </Android.support.v4.widget.DrawerLayout></Relativelayout>

Values/strings.xml

<?XML version= "1.0" encoding= "Utf-8"?><Resources>    <stringname= "App_name">Drawerlayouttest</string>    <stringname= "Action_settings">Settings</string>    <stringname= "Drawer_close">Close drawer</string>    <stringname= "Drawer_open">Open the drawer.</string>        <String-arrayname= "Planets_array">        <Item>Home</Item>        <Item>Found</Item>        <Item>Collection</Item>        <Item>Set up</Item>         <Item>Draft</Item>        <Item>History</Item>        <Item>Mode</Item>    </String-array>    </Resources>

Drawerlayoutdemo.java

 Packagecom.example.drawerlayouttest;ImportAndroid.os.Bundle;Importandroid.app.Activity;Importandroid.content.res.Configuration;ImportAndroid.graphics.Color;ImportAndroid.view.MenuItem;ImportAndroid.view.View;ImportAndroid.widget.AdapterView;ImportAndroid.widget.AdapterView.OnItemClickListener;ImportAndroid.widget.ArrayAdapter;ImportAndroid.widget.ListView;ImportAndroid.support.v4.app.ActionBarDrawerToggle;ImportAndroid.support.v4.view.GravityCompat;Importandroid.support.v4.widget.DrawerLayout; Public classDrawerlayoutdemoextendsactivity{Privatestring[] Mplanettitles; PrivateDrawerlayout mdrawerlayout; PrivateActionbardrawertoggle Mdrawertoggle; PrivateListView mdrawerlist; @Override Public voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_drawer); Mdrawerlayout=(drawerlayout) Findviewbyid (r.id.drawer_layout); //Initialize ListViewInitlistview (); //Add drawer SwitchMdrawertoggle =NewActionbardrawertoggle ( This, Mdrawerlayout, R.drawable.ic_drawer, R.string.drawer_open, R.string.drawer_close) {            //Drawer closed             Public voidondrawerclosed (view view) {Invalidateoptionsmenu ();//creates call to Onprepareoptionsmenu ()            }           //Drawer Open             Public voidondraweropened (View drawerview) {invalidateoptionsmenu ();        }        };               Mdrawerlayout.setdrawerlistener (Mdrawertoggle); //enable ActionBar app icon to behave as action to toggle nav drawerGetactionbar (). setdisplayhomeasupenabled (true); //Getactionbar (). Sethomebuttonenabled (true);    }    Private voidInitlistview () {mdrawerlist=(ListView) Findviewbyid (r.id.left_drawer); Mplanettitles=getresources (). Getstringarray (R.array.planets_array); Mdrawerlist.setadapter (NewArrayadapter<string> ( This, Android.                R.layout.simple_list_item_1, Mplanettitles)); //Setting up Listener eventsMdrawerlist.setonitemclicklistener (NewOnitemclicklistener () {@Override Public voidOnitemclick (adapterview<?>Parent, view view,intPositionLongID) {mdrawerlist.setitemchecked (position,true);                Settitle (Mplanettitles[position]);            Mdrawerlayout.closedrawer (mdrawerlist);    }        }); }       //callback after activity is run@Overrideprotected voidonpostcreate (Bundle savedinstancestate) {Super. Onpostcreate (savedinstancestate); //Sync the toggle state after onrestoreinstancestate have occurred.mdrawertoggle.syncstate (); }    //no need to restart activity when configuration changes@Override Public voidonconfigurationchanged (Configuration newconfig) {Super. onconfigurationchanged (Newconfig);    Mdrawertoggle.onconfigurationchanged (Newconfig); }    //Set Options Menu@Override Public Booleanonoptionsitemselected (MenuItem item) {//Pass the event to Actionbardrawertoggle, if it returns//true, then it has handled the app icon touch event        if(mdrawertoggle.onoptionsitemselected (item)) {return true; }        return Super. onoptionsitemselected (item); }}

Icon for drawer switch:

After the code runs, open the drawer, the effect

Android Note: Use of drawerlayout drawer layouts