Help!! Andriod Admob Reward Video

I have been trying to set up a reward video for a week I don't know what im doing wrong im using latest version of buildbox 2 and have done various changes and tried many diff methods but they don't seem to work can some me plz kind enough to give working code for it this it the latest changes I tried

and this is just one example I also tried many other things but it doesnot seem to work can anyone help plz



public class AdIntegrator {
public static native boolean rewardedVideoDidEnd();
private static RewardedVideoAd mRewardedVideoAd;
private static WeakReference<Cocos2dxActivity> activity;
public static void initBridge(Cocos2dxActivity act){
activity = new WeakReference<Cocos2dxActivity>(act);
}
public static void initAds(){
activity.get().runOnUiThread( new Runnable() {
public void run() {
FrameLayout frameLayout = (FrameLayout)activity.get().findViewById(android.R.id.content);
RelativeLayout layout = new RelativeLayout( activity.get() );
frameLayout.addView( layout );
RelativeLayout.LayoutParams adViewParams = new RelativeLayout.LayoutParams(
FrameLayout.LayoutParams.WRAP_CONTENT,
FrameLayout.LayoutParams.WRAP_CONTENT);
adViewParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
adViewParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
adViewParams.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.TRUE);

// moPubView = new MoPubView( activity.get() );
// moPubView.setLayoutParams( adViewParams );
// moPubView.setAdUnitId(bannerID);
// moPubView.loadAd();
// moPubView.setVisibility(View.INVISIBLE);
// layout.addView(moPubView);
//
// //Interstitials
// mInterstitial = new MoPubInterstitial(activity.get(), interstitialID);
// mInterstitial.setInterstitialAdListener(AdIntegratorHelper.getInstance());
// mInterstitial.load();
//RewardedVideo
//MoPubRewardedVideos.loadRewardedVideo(rewardedVideoId);
//MoPubRewardedVideos.setRewardedVideoListener(AdIntegratorHelper.getInstance());
mRewardedVideoAd = MobileAds.getRewardedVideoAdInstance(activity.get());
mRewardedVideoAd.loadAd("ca-app-pub-3940256099942544/5224354917", new AdRequest.Builder().build());
mRewardedVideoAd.setRewardedVideoAdListener(AdIntegratorHelper.getInstance());
}
});
}
public static void showBanner(){
}
public static void hideBanner(){
}
public static boolean isBannerVisible(){
return true;
}
public static boolean isRewardedVideoAvialable(){
return true;
}
public static void showInterstitial(){
}
public static void showRewardedVideo(){
if (mRewardedVideoAd.isLoaded()) {
mRewardedVideoAd.show();
}else {
Log.d("TAG", "The Reward Video wasn't loaded yet.");
}
}
public static void buttonActivated(){
}

public static boolean buttonVisible(){
return true;
}
}



public class AdIntegratorHelper implements RewardedVideoAdListener {

private static AdIntegratorHelper instance = null;
public static AdIntegratorHelper getInstance()
{
if (instance == null)
instance = new AdIntegratorHelper();

return instance;
}

@Override
public void onRewardedVideoAdLoaded() {

}

@Override
public void onRewardedVideoAdOpened() {

}

@Override
public void onRewardedVideoStarted() {

}

@Override
public void onRewardedVideoAdClosed() {

}

@Override
public void onRewarded(RewardItem rewardItem) {

}

@Override
public void onRewardedVideoAdLeftApplication() {

}

@Override
public void onRewardedVideoAdFailedToLoad(int i) {

}

@Override
public void onRewardedVideoCompleted() {

AdIntegrator.rewardedVideoDidEnd();

}
}



<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.hc.mine.cube"
android:versionCode="6"
android:versionName="1.5">
<supports-screens
android:anyDensity="true"
android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true" /> <!-- INMOBI -->
<!--
<uses-permission android:name="android.permission.READ_LOGS" />
<uses-permission android:name="android.permission.VIBRATE"/>
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.READ_CALENDAR"/>
<uses-permission android:name="android.permission.WRITE_CALENDAR"/>
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="com.google.android.gms.permission.ACTIVITY_RECOGNITION"/>
-->
<!-- INMOBI -->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<application
android:name="android.support.multidex.MultiDexApplication"
android:allowBackup="true"
android:hardwareAccelerated="true"
android:icon="@drawable/icon"
android:label="@string/app_name"
android:largeHeap="true">
<activity android:name=".SplashActivity"
android:screenOrientation="portrait"
android:theme="@Style/Theme.AppCompat.DayNight.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.gms.ads.APPLICATION_ID"
android:value="ca-app-pub-4228694059392933~6550419494" />
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<meta-data
android:name="com.google.android.gms.games.APP_ID"
android:value="@string/app_id" />
<activity
android:name=".PTPlayer"
android:configChanges="orientation"
android:label="@string/app_name"
android:screenOrientation="portrait"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
</activity> <!-- FACEBOOK SDK -->
<!--
<activity android:name="com.facebook.ads.InterstitialAdActivity"
android:configChanges="keyboardHidden|orientation"
android:screenOrientation="portrait"/>
-->
<!-- FACEBOOK SDK -->
<activity
android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:theme="@android:style/Theme.Translucent" />
</application>
</manifest>



buildscript {
repositories {
google()
jcenter()
maven { url "https://s3.amazonaws.com/moat-sdk-builds" }
}
dependencies {
classpath 'com.android.tools.build:gradle:3.2.1'
}
}

allprojects {
repositories {
google()
jcenter()
maven { url "https://s3.amazonaws.com/moat-sdk-builds" }
}
}




apply plugin: 'com.android.application'
android {
compileSdkVersion 26
buildToolsVersion "28.0.3"
defaultConfig {
applicationId "com.companyname.gamename"
minSdkVersion 16
targetSdkVersion 26
multiDexEnabled true
ndk {
moduleName "player_shared"
}
}

buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
}
}

dexOptions {
javaMaxHeapSize "4g"
}
}

dependencies {
implementation 'com.google.android.gmslay-services-auth:16.0.1'
implementation 'com.google.android.gmslay-services-games:17.0.0'
implementation 'com.android.support:multidex:1.0.3'
implementation fileTree(dir: 'libs', include: ['*.jar', '*.aar'])
implementation 'com.google.android.gmslay-services-ads:17.2.0'
// More deps here //
implementation 'com.android.support:support-v4:26.1.0'
implementation 'com.android.support:recyclerview-v7:26.1.0'
}