Register Listener

registerListener.ts

public listViewLoaded(args: any): void {

        this.listView = this.page.getViewById('playerListView');
        if (isAndroid) {
            this.listAdapter = this.listView.android.getAdapter();
        }

        if (isAndroid) {
        
            const that: any = this;
            let currentFirstVisibleItem: number;
            let currentVisibleItemCount: number;
            let currentTotalItemCount: number;
            let currentScrollState: any;
            const listener: any = new android.widget.AbsListView
                      .OnScrollListener({
                          onScroll : function(view: any, firstVisibleItem: any, visibleItemCount: any, totalItemCount: any) : void {
                              //   console.log('onScroll=> firstVisibleItem: ' + firstVisibleItem + ', totalItemCount: ' + totalItemCount);
                              if (firstVisibleItem === 0) {
                              }
                              currentFirstVisibleItem = firstVisibleItem;
                              currentVisibleItemCount = visibleItemCount;
                              currentTotalItemCount = totalItemCount;
                          },
                          onScrollStateChanged : function(view: any, scrollState: any) : void {
                              currentScrollState = scrollState;
                              // SCROLL_STATE_IDLE = 0
                              if (currentVisibleItemCount > 0 && currentScrollState === 0) {
                                  if (currentFirstVisibleItem === 0) {
                                      that.loadMorePlayersTop();
                                      console.log('LOAD MORE...');
                                  }
                              }
                          }
                      })
                  this.listView.android.setOnScrollListener(listener);
        } else {
            const newDelegate: any = NewUITableViewDelegateImpl.initWithOriginalDelegate
            ((<any>this.listView)._delegate, this.loadMorePlayersTop.bind(this));
            (<any>this.listView)._delegate = newDelegate;
        }
    }