Why does my imageview app force closes when I tried on samsung galaxy s5 but works perfectly on android 32 internet tablet

I have simple imageview app that plays background music when user slides through images and music stops when user reaches the last image. I tried it on my archos internet tablet and it works fine on that device. However, my app force closes when I tried on samsung galaxy s5.. I feel my codes are fine.. Please provide solution...

Following are my codes...

MAINACTIVITY.java

import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;

public class MainActivity extends Activity {

    MediaPlayer oursong;
    ViewPager viewPager;
    ImageAdapter adapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

         oursong = MediaPlayer.create(MainActivity.this, R.raw.a);
         oursong.seekTo(0);
         oursong.start();

         viewPager = (ViewPager) findViewById(R.id.view_pager);
         adapter = new ImageAdapter(this);
         viewPager.setAdapter(adapter);


         viewPager.setOnPageChangeListener(MyViewPagerListener);
    }



    private int pos = 0;
    @Override
    protected void onPause() {
            super.onPause();

           if(oursong != null){
               pos = oursong.getCurrentPosition();
               oursong.release();
               oursong = null;
            }
    }

    @Override
    protected void onResume(){
          super.onResume();
         oursong = MediaPlayer.create(MainActivity.this, R.raw.a);
         oursong.seekTo(pos); // You will probably want to save an int to restore here
         oursong.start();
    }


   private final OnPageChangeListener MyViewPagerListener = new OnPageChangeListener() {

            @Override
            public void onPageSelected(int pos) {
              if (pos == adapter.getCount() - 1){
                 // adding null checks for safety
                 if(oursong != null){
                    oursong.pause();
                 }

               } else if (!oursong.isPlaying()){ 

                // adding null check for safety
                if(oursong != null){
                    oursong.start();
                }
              }         
            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
             // TODO Auto-generated method stub

            }

            @Override
            public void onPageScrollStateChanged(int arg0) {
            // TODO Auto-generated method stub

            }
        };

 }

imageadapter.java

import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

public class ImageAdapter extends PagerAdapter {
    Context context;
    private int[] GalImages = new int[] {
        R.drawable.one,
        R.drawable.two,
        R.drawable.three,
        R.drawable.four,
        R.drawable.five
    };
    ImageAdapter(Context context){
        this.context=context;
    }
    @Override
    public int getCount() {
      return GalImages.length;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
      return view == ((ImageView) object);
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
      ImageView imageView = new ImageView(context);
      int padding = context.getResources().getDimensionPixelSize(R.dimen.padding_small);
      imageView.setPadding(padding, padding, padding, padding);
      imageView.setScaleType(ImageView.ScaleType.FIT_XY);
      imageView.setImageResource(GalImages[position]);
      ((ViewPager) container).addView(imageView, 0);
      return imageView;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
      ((ViewPager) container).removeView((ImageView) object);
    }
  }

Manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://ift.tt/nIICcg"
    package="com.myganesha2014"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="16" />


    <application
        android:allowBackup="true"
        android:icon="@drawable/icon"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
         <!-- Splash screen -->
        <activity
            android:name="com.myganesha2014.SplashScreen"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:theme="@android:style/Theme.Black.NoTitleBar" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <!-- Main activity -->
        <activity
            android:name="com.myganesha2014.MainActivity"
            android:label="@string/app_name"
             android:configChanges="orientation|screenSize"
             android:icon="@drawable/icon">
        </activity>
    </application>

</manifest>