java - How to get time for splashscreen -

how time splashcreen? want add 15 second time? how can integrate code? example, direct activity after 15 seconds.

package com.trees.activities;  import android.app.activity;  import android.content.intent;  import android.content.sharedpreferences;  import android.os.bundle;  public class mainslider extends activity{      @override     protected void oncreate(bundle savedinstancestate) {         // todo auto-generated method stub         super.oncreate(savedinstancestate);          sharedpreferences settings=getsharedpreferences("prefs",0);         boolean firstrun=settings.getboolean("firstrun",false);         if(firstrun==false)//if running first time         //splash load first time         {             sharedpreferences.editor editor=settings.edit();             editor.putboolean("firstrun",true);             editor.commit();             intent i=new intent(mainslider.this,materialintro.class);             startactivity(i);             finish();         }         else         {             intent a=new intent(mainslider.this,mainactivity.class);             startactivity(a);             finish();         }     } } 

how to: simple spash screen

first need define spash screen in layout.xml file

  <?xml version="1.0" encoding="utf-8"?>   <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"           android:orientation="vertical" android:layout_width="fill_parent"           android:layout_height="fill_parent">            <imageview android:id="@+id/splashscreen" android:layout_width="wrap_content"                   android:layout_height="fill_parent"                   android:src="@drawable/splash"                   android:layout_gravity="center"/>            <textview android:layout_width="fill_parent"                     android:layout_height="wrap_content"                     android:text="hello world, splash"/>    </linearlayout> 

and activity:

import android.app.activity; import android.content.intent; import android.os.bundle; import android.os.handler;  public class splash extends activity {  /** duration of wait **/ private final int splash_display_length = 1000;  /** called when activity first created. */ @override public void oncreate(bundle icicle) {     super.oncreate(icicle);     setcontentview(r.layout.splashscreen);      /* new handler start menu-activity       * , close splash-screen after seconds.*/     new handler().postdelayed(new runnable(){         @override         public void run() {             /* create intent start menu-activity. */             intent mainintent = new intent(splash.this,menu.class);             splash.this.startactivity(mainintent);             splash.this.finish();         }     }, splash_display_length); } }