检测flowlistview是否已触底

import android.os.Bundle;
import android.view.View;
import android.widget.AbsListView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import androidx.appcompat.app.AppCompatActivity;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private ListView flowListView;
    private ArrayAdapter<String> adapter;
    private List<String> dataList;
    private boolean isLoading = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        flowListView = findViewById(R.id.flowListView);
        dataList = new ArrayList<>();
        for (int i = 0; i < 20; i++) {
            dataList.add("Item " + i);
        }

        adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, dataList);
        flowListView.setAdapter(adapter);

        flowListView.setOnScrollListener(new AbsListView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(AbsListView view, int scrollState) {}

            @Override
            public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
                if (!isLoading && (firstVisibleItem + visibleItemCount >= totalItemCount - 1)) {
                    isLoading = true;
                    loadMoreData();
                }
            }
        });
    }

    private void loadMoreData() {
        // Simulate loading more data
        flowListView.postDelayed(() -> {
            for (int i = 0; i < 10; i++) {
                dataList.add("Item " + (dataList.size() + i));
            }
            adapter.notifyDataSetChanged();
            isLoading = false;
        }, 2000);
    }
}

flowListView.setOnScrollListener(new AbsListView.OnScrollListener() {
    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {}

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        int lastVisibleItemPosition = firstVisibleItem + visibleItemCount;
        if (!isLoading && lastVisibleItemPosition >= totalItemCount - 2) { // 考虑底部额外视图的高度
            isLoading = true;
            loadMoreData();
        }
    }
});