Java 如何获得观看splashscreen的时间

如何挤出时间使用喷溅屏？ 我想加上大约15秒的时间？如何将其集成到代码中？ 例如，在大约15秒后指导活动

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 for first time
        //Splash will load for 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();
        }
    }
}

如何：

首先，需要在layout.xml文件中定义spash屏幕

  <?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>

---

您希望您的用户在使用您的应用程序之前等待15秒？？例如，从me15秒即时卸载。

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 the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.splashscreen);

    /* New Handler to start the Menu-Activity 
     * and close this Splash-Screen after some seconds.*/
    new Handler().postDelayed(new Runnable(){
        @Override
        public void run() {
            /* Create an Intent that will start the Menu-Activity. */
            Intent mainIntent = new Intent(Splash.this,Menu.class);
            Splash.this.startActivity(mainIntent);
            Splash.this.finish();
        }
    }, SPLASH_DISPLAY_LENGTH);
}
}