public class MediaActivity extends RequestPermissionActivity implements PrerollAdListener {

    private static final String TAG = "MediaActivity";

    private RelativeLayout mAdLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_media);
        mAdLayout = (RelativeLayout) findViewById(R.id.adLayout);
       // Permission handling code for Android 6.0 and Above
        super.requestAppPermissions(mPermissions, R.string.runtime_permissions,  REQUEST_PERMISSIONS);
   }

    @Override
    public void onPermissionsGranted(int requestCode) {
        showPrerollAd();
    }

    private void showPrerollAd() {
        preRollVideoAd = PreRollVideoAd.getInstance(this);
        String contentVideo = "http://cdn.vdopia.com/files/happy.mp4";
       ViewGroup parent = (ViewGroup) preRollVideoAd.getParent();
        if (parent != null) {
            parent.removeAllViews();
        }
        mAdLayout.addView(preRollVideoAd);
        preRollVideoAd.setPrerollAdListener(this);
        preRollVideoAd.showAd();
    }

    @Override
    public void onPrerollAdLoaded(View prerollAd) {
        Log.d(TAG, "PreRoll Video Ad onPrerollAdLoaded");
    }

    @Override
    public void onPrerollAdFailed(View prerollAd, LVDOAdRequest.LVDOErrorCode errorCode) {
        Log.d(TAG, "PreRoll Video Ad onPrerollAdFailed");    }

    @Override
    public void onPrerollAdClicked(View prerollAd) {
        Log.d(TAG, "PreRoll Video Ad onPrerollAdClicked");
    }

    @Override
    public void onPrerollAdCompleted(View prerollAd) {
        Log.d(TAG, "PreRoll Video Ad onPrerollAdCompleted");
    }

    @Override
    public void onPrepareMainContent(MediaPlayer player) {
        Log.d(TAG, "PreRoll Video onPrepareMainContent");
    }

    @Override
    public void onErrorMainContent(MediaPlayer player,  int code) {
        Log.d(TAG, "PreRoll Video onErrorMainContent : " + code);
        setContentVisibility();
    }

    @Override
    public void onCompleteMainContent(MediaPlayer player) {
        Log.d(TAG, "PreRoll Video onCompleteMainContent");
        setContentVisibility();
    }

    private void setContentVisibility() {
        MediaActivity.this.finish();
    }
}