Load more (paging) ListView in simplest way

LoadMoreListView.java

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.AbsListView;
import android.widget.BaseAdapter;
import android.widget.HeaderViewListAdapter;
import android.widget.ListView;

public class LoadMoreListView extends ListView implements AbsListView.OnScrollListener {
    private OnLoadMorListener onLoadMorListener;
    private int mLastVisibleEnd;
    private View mFooter;
    private boolean hasFooter;
    private boolean isLoadFinished;

    public LoadMoreListView(Context context) {
        super(context);
        init();
        addFooter();
    }

    public LoadMoreListView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
        addFooter();
    }

    public LoadMoreListView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
        addFooter();
    }

    private void init() {
        setOnScrollListener(this);
        hasFooter = false;
        isLoadFinished = false;
        mLastVisibleEnd = 0;
    }

    OnScrollListener onScrollListener;

    public void addOnScrollListener(OnScrollListener onScrollListener) {
        this.onScrollListener = onScrollListener;
    }

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        if (onScrollListener != null) {
            onScrollListener.onScrollStateChanged(view, scrollState);
        }
    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        if (onScrollListener != null) {
            onScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
        }

        int lastItem = firstVisibleItem + visibleItemCount;

        if (lastItem == totalItemCount) {
            if (lastItem != mLastVisibleEnd && totalItemCount > 1) {
                mLastVisibleEnd = lastItem;
                triggerLastVisible();
            }
        }
    }

    private void triggerLastVisible() {
        MyLog.d("Last visible isLoadFinished = " + isLoadFinished);
        if (isLoadFinished) return;
        MyLog.d("Trigger load more");
        if (onLoadMorListener != null) {
            onLoadMorListener.loadmore(this, (BaseAdapter) ((HeaderViewListAdapter) getAdapter()).getWrappedAdapter());
        }
    }

    public void setLoadMoreView(View view) {
        if (mFooter != null) removeFooterView(mFooter);
        mFooter = view;
    }

    public void setOnLoadMoreListener(OnLoadMorListener refreshListener) {
        onLoadMorListener = refreshListener;
    }

    public void setLoadFinished(boolean loadFinished) {
        isLoadFinished = loadFinished;
        if (isLoadFinished) {
            removeFooter();
        } else if(!hasFooter) {
            addFooter();
        }
    }

    private void addFooter() {
        if (mFooter == null) {
            mFooter = View.inflate(getContext(), R.layout.item_loading_more, null);
        }
        addFooterView(mFooter);
        hasFooter = true;
    }

    private void removeFooter() {
        if (mFooter == null) return;
        mLastVisibleEnd--;
        removeFooterView(mFooter);
        hasFooter = false;
    }

    public interface OnLoadMorListener {
        /**
         * @param listView the listview itself
         * @param adapter  the adapter that you need to repopulate
         */
        void loadmore(LoadMoreListView listView, BaseAdapter adapter);
    }
}

MainActivity.java

LoadMoreListView lstLoadMore = (LoadMoreListView) findViewById(R.id.listview);
lstLoadMore.setOnLoadMoreListener(new LoadMoreListView.OnLoadMorListener() {
  @Override
  public void loadmore(LoadMoreListView listView, BaseAdapter adapter) {
    loadData();
  }
});

///////////////////////////////////////////////////////////////////////////////
// Check load all item -> call setLoadFinished to avoid load more
if(loadedAllItem){
  lstLoadMore.setLoadFinished(true);
}