Custom Interstitial of startapp

activity_ads.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/gray"
    tools:context="com.vintro.rainbow.features.ads.AdsActivity">

    <RelativeLayout
        android:layout_marginBottom="@dimen/_16sdp"
        android:layout_centerInParent="true"
        android:id="@+id/rl_main"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
    </RelativeLayout>
    <RelativeLayout
        android:layout_width="42dp"
        android:layout_height="42dp"
        android:layout_marginEnd="25dp"
        android:layout_marginTop="25dp"
        android:layout_alignParentEnd="true">

        <ImageView
            android:id="@+id/btnClose"
            android:layout_width="42dp"
            android:layout_height="42dp"
            android:src="@drawable/icon_close_splash" />

        <TextView
            android:id="@+id/tv_count_timer"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:textColor="#fff"
            android:visibility="gone"
            android:textSize="20sp"
            android:gravity="center"
            android:background="@drawable/bg_tv_count_timer"/>
    </RelativeLayout>
</RelativeLayout>

Interstitial_startapp.java

public class AdsActivity extends AppCompatActivity {

    @BindView(R.id.rl_main)
    RelativeLayout rlMain;
    @BindView(R.id.btnClose)
    ImageView btnClose;
    @BindView(R.id.tv_count_timer)
    TextView tvCountTimer;
    private String path;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ads);
        ButterKnife.bind(this);
        showAds();
    }

    private void showAds() {
        RelativeLayout mainLayout = findViewById(R.id.rl_main);
        Mrec startAppMrec = new Mrec(this);
        StartAppAd.disableSplash();
        RelativeLayout.LayoutParams mrecParameters =
                new RelativeLayout.LayoutParams(
                        RelativeLayout.LayoutParams.WRAP_CONTENT,
                        RelativeLayout.LayoutParams.WRAP_CONTENT);
        mrecParameters.addRule(RelativeLayout.CENTER_IN_PARENT);
        startAppMrec.setBannerListener(new BannerListener() {

            @Override
            public void onReceiveAd(View view) {

            }

            @Override
            public void onFailedToReceiveAd(View view) {
                Intent i = new Intent(AdsActivity.this, CongratulationActivity.class);
                path = getIntent().getStringExtra(Const.IMAGE_PATH);
                i.putExtra(Const.IMAGE_PATH, path);
                startActivity(i);
                finish();
            }

            @Override
            public void onClick(View view) {

            }
        });
        mainLayout.addView(startAppMrec, mrecParameters);
    }

    @OnClick(R.id.btnClose)
    public void onViewClicked() {
        Intent i = new Intent(this, CongratulationActivity.class);
        path = getIntent().getStringExtra(Const.IMAGE_PATH);
        i.putExtra(Const.IMAGE_PATH, path);
        startActivity(i);
        finish();
    }
}