Android App Development detection solution into the foreground from background

public class ActLifecycle implements ActivityLifecycleCallbacks {

  private int mPreActivityStartedCount = 0;
  private int mActivityStartedCount = 0;
  private int mActivityOrientation = Configuration.ORIENTATION_UNDEFINED;

  @Override
  public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
  }

  @Override
  public void onActivityStarted(Activity activity) {
    mPreActivityStartedCount = mActivityStartedCount;
    mActivityStartedCount++;
     Int Orientation = getOrientation (Activity);
     IF (mPreActivityStartedCount == == 0 && mActivityStartedCount. 1 
        && Orientation == mActivityOrientation) { 
      handleAppForeground (Activity); // App from the background into the foreground, the processing method of this custom in particular business 
    } 
    mActivityOrientation = Orientation; 
  } 

  Private  int getOrientation (the Activity Activity) {
     IF (! Activity = null && activity.getResources () =! null ) { 
      the Configuration Configuration = activity.getResources () the getConfiguration ();.
       IF (configuration != null) {
        return configuration.orientation;
      }
    }
    return Configuration.ORIENTATION_UNDEFINED;
  }

  @Override
  public void onActivityResumed(Activity activity) {
  }

  @Override
  public void onActivityPaused(Activity activity) {
  }

  @Override
  public void onActivityStopped(Activity activity) {
    mPreActivityStartedCount = mActivityStartedCount;
    mActivityStartedCount--;
  }

  @Override
  public void onActivitySaveInstanceState (the Activity Activity, the Bundle outState) { 
  } 

  @Override 
  public  void onActivityDestroyed (the Activity Activity) { 
  } 
} 

// Register app lifecycle callback

application.registerActivityLifecycleCallbacks(new ActLifecycle());