android - tab as like fileexploler -

how can put tab @ above..

i want type of tab when click item show on above,can give snippet or links.. , please tell brief if available how can this.. show in figure red rectangle there android tools or library.... or directly can code??

thanks in advance

rectangle describe want

belove image

..

i have made simple project you. should make more beautiful wasn't focusing on that, on code.

first add these values color.xml

<resources>     <color name="buttongrey">#7a7a7a</color>     <color name="layoutholderstartcolor">#f7f7f7</color>     <color name="layoutholderendcolor">#e1e1e1</color> </resources> 

next create background button holder , name gradient_button_holder.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android">     <gradient          android:startcolor="@color/layoutholderstartcolor"          android:endcolor="@color/layoutholderendcolor"         android:angle="270"      />     <corners android:radius="3dp" /> </shape> 

now create activity_main.xml

note: using images, download whole project @ bottom , them out

<relativelayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     >      <relativelayout         android:id="@+id/pathholder"         android:layout_width="match_parent"         android:layout_height="35dp"         android:layout_alignparenttop="true"         android:background="@drawable/gradient_button_holder"         android:gravity="center_vertical">          <button             android:id="@+id/btnadd"             android:layout_width="29dp"             android:layout_height="29dp"             android:layout_alignparentright="true"             android:layout_marginbottom="3dp"             android:layout_marginleft="3dp"             android:layout_marginright="3dp"             android:layout_margintop="3dp"             android:background="@color/buttongrey"             android:gravity="center"             android:onclick="onbtnadd"             android:text="+"             android:textsize="15sp"/>          <imageview             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:contentdescription="@string/app_name"             android:src="@drawable/seperator"             android:visibility="gone"/>          <horizontalscrollview             android:id="@+id/btnscrollview"             android:layout_width="wrap_content"             android:layout_height="35dp"             android:layout_alignparentleft="true"             android:layout_toleftof="@id/btnadd">              <linearlayout                 android:id="@+id/btnfolderholder"                 android:layout_width="wrap_content"                 android:layout_height="35dp"                 android:orientation="horizontal">             </linearlayout>         </horizontalscrollview>     </relativelayout> </relativelayout> 

next create utils class

import android.annotation.suppresslint; import android.os.build; import android.view.view;  import java.util.concurrent.atomic.atomicinteger;   public class utils {      private static final atomicinteger snextgeneratedid = new atomicinteger(1);      /**      * generate value suitable use in setid(int}.      * value not collide id values generated @ build time aapt r.id.      *      * @return generated id value      */     private static int generateviewid() {         (; ; ) {             final int result = snextgeneratedid.get();             // aapt-generated ids have high byte nonzero; clamp range under that.             int newvalue = result + 1;             if (newvalue > 0x00ffffff) {                 newvalue = 1; // roll on 1, not 0.             }             if (snextgeneratedid.compareandset(result, newvalue)) {                 return result;             }         }     }      @suppresslint("newapi")     public static int generateid() {         if (build.version.sdk_int < build.version_codes.jelly_bean_mr1) {              return generateviewid();         }         else {              return view.generateviewid();         }     }  } 

and mainactivity

import android.graphics.color; import android.os.environment; import android.support.v7.app.actionbaractivity; import android.os.bundle; import android.util.typedvalue; import android.view.view; import android.view.viewgroup; import android.view.viewtreeobserver; import android.widget.button; import android.widget.horizontalscrollview; import android.widget.imageview; import android.widget.linearlayout; import android.widget.toast;  import java.io.file;   public class mainactivity extends actionbaractivity {      private linearlayout btnholder;     private horizontalscrollview scroller; //parent folders     private viewtreeobserver observer; //needed scroll end     private toast toast;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);         init();         makebuttons(environment.getexternalstoragedirectory().getpath(), "folder1", "folder2", "folder3");     }       private void makebuttons(string... values) {         stringbuilder sb = new stringbuilder(values.length * 2);         (int = 0; < values.length - 1; ++i) {             sb.append(values[i]);             sb.append(file.separator);             addbutton(values[i], sb.tostring(), true);         }         sb.append(values[values.length - 1]);         addbutton(values[values.length - 1], sb.tostring(), false);     }       private void init() {         setwidgetconnections();         observer = scroller.getviewtreeobserver();         observer.addongloballayoutlistener(new viewtreeobserver.ongloballayoutlistener() {              public void ongloballayout() {                 // scroll last folder (displayed on                 // right)                 scroller.fullscroll(horizontalscrollview.focus_right);             }         });     }      private void setwidgetconnections() {         btnholder = (linearlayout) findviewbyid(r.id.btnfolderholder);         scroller = (horizontalscrollview) findviewbyid(r.id.btnscrollview);     }      public void onbtnadd(view v) {      }      private void addbutton(final string text, final string path, boolean withimage) {         // dynamic call add buttons         linearlayout.layoutparams params = new linearlayout.layoutparams(linearlayout.layoutparams.wrap_content, viewgroup.layoutparams.wrap_content);         button btn = new button(this);         btn.setid(utils.generateid());         btn.settext(text);         btn.settextcolor(color.black);         btn.settextsize(typedvalue.complex_unit_dip, 12);         btn.setonclicklistener(new view.onclicklistener() {              public void onclick(view v) {                 gotopath(path);             }         });          //btn.setbackgroundresource(r.drawable.gradient_button_holder);         btnholder.addview(btn, params);         if (withimage) {             imageview view = new imageview(this);             view.setbackgroundresource(r.drawable.seperator2);             btnholder.addview(view, params);         }        }      private void gotopath(string path) {         showtoast(path);     }      private void showtoast(string text) {         if (toast != null) {             toast.cancel();         }          toast = toast.maketext(this, text, toast.length_short);         toast.show();     }   } 

this final result , note horizontally scrollable

you can download whole project here