I have figured it out how to Integrate the Chartboost in an Andengine Game by myself
Step 1) Initialize the Chartboost in OnCreateEngineOption
//ChrtBoost Code
cb = Chartboost.sharedChartboost();
String appId = "****************";
String appSignature = "****************************";
cb.onCreate(this,appId,appSignature, null);
cb.onStart(this);
cb.setImpressionsUseActivities(true);
//end of chartBoost Code
Step 2) Start Session in onCreateResource Method
this.runOnUiThread(new Runnable() {
public void run() {
cb.startSession();
cb.showInterstitial();
}
});
Step 3 Caching the add's initially use onCreateScene Method
//cache the adds initially
this.cb.cacheInterstitial();
Step 4 to show add in your scene call following method
cb.showInterstitial();