Android Open Source - XPullToRefreshListView Pull And Load List View

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Back to project page XPullToRefreshListView.

License

The source code is released under:

MIT License

Java Source Code

package com.custom.widget;
//from w w  w  .  j  av a2  s.co m
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.AbsListView;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;


public class PullAndLoadListView extends PullToRefreshListView {
  // this params is design to use when then data you cannot load more,set this to false and it won't called listener.loadmore() and updata the UI(progressbar)
   private boolean _canLoadMore = true;
  private TextView mLabLoadMore;

  public PullAndLoadListView(Context context, AttributeSet attrs) {
    super(context, attrs);
    initComponent(context);
  }

  // Listener to process load more items when user reaches the end of the list
  private OnLoadMoreListener mOnLoadMoreListener;
  // To know if the list is loading more items
  private boolean mIsLoadingMore = false;

  // footer
  private RelativeLayout mFooterView;
  // private TextView mLabLoadMore;
  private ProgressBar mProgressBarLoadMore;

  public PullAndLoadListView(Context context) {
    super(context);
    initComponent(context);
  }

  public PullAndLoadListView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    initComponent(context);
  }

  public void initComponent(Context context) {

    // footer
    mFooterView = (RelativeLayout) mInflater.inflate(
        R.layout.load_more_footer, this, false);

    mLabLoadMore = (TextView) mFooterView
        .findViewById(R.id.load_more_lab_view);

    mProgressBarLoadMore = (ProgressBar) mFooterView
        .findViewById(R.id.load_more_progressBar);

    mFooterView.setOnClickListener(new onClickLoadListener());
    addFooterView(mFooterView);
  }

  /**
   * Register a callback to be invoked when this list reaches the end (last
   * item be visible)
   * 
   * @param onLoadMoreListener
   *            The callback to run.
   */

  public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) {
    mOnLoadMoreListener = onLoadMoreListener;
  }

  @Override
  public void onScroll(AbsListView view, int firstVisibleItem,
      int visibleItemCount, int totalItemCount) {
    super.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);

    // if need a list to load more items
    if (mOnLoadMoreListener != null) {

//      if (mProgressBarLoadMore.getVisibility() == View.GONE)
//        mLabLoadMore.setVisibility(View.VISIBLE);
//      else
//        mLabLoadMore.setVisibility(View.GONE);

      if (visibleItemCount == totalItemCount) {
        mProgressBarLoadMore.setVisibility(View.GONE);
        mLabLoadMore.setVisibility(View.GONE);
        // mFooterView.setVisibility(View.GONE);
        return;
      }

      boolean loadMore = firstVisibleItem + visibleItemCount >= totalItemCount;

      if (_canLoadMore &&!mIsLoadingMore && loadMore && mRefreshState != REFRESHING
          && mCurrentScrollState != SCROLL_STATE_IDLE) {
        mProgressBarLoadMore.setVisibility(View.VISIBLE);
        // mLabLoadMore.setVisibility(View.VISIBLE);
        mLabLoadMore.setVisibility(View.GONE);
        // mFooterView.setVisibility(View.VISIBLE);
        mIsLoadingMore = true;
        onLoadMore();
      }

    }
  }

  public void onLoadMore() {
    if (mOnLoadMoreListener != null) {
      mOnLoadMoreListener.onLoadMore();
    }
  }
  /**
   * set if it can load more data to update the UI
   * 
   * @param canLoadMore
   */
  public void setCanLoadMore(boolean canLoadMore) {
    this._canLoadMore = canLoadMore;
  }

  /**
   * Notify the loading more operation has finished
   */
  public void onLoadMoreComplete() {
    mIsLoadingMore = false;
    mLabLoadMore.setVisibility(View.VISIBLE);
    mProgressBarLoadMore.setVisibility(View.GONE);
  }

  public class onClickLoadListener implements OnClickListener {

    @Override
    public void onClick(View v) {
      if (mLabLoadMore.getVisibility() != View.VISIBLE)
        return;
      if (!mIsLoadingMore && mRefreshState != REFRESHING
          && mCurrentScrollState == SCROLL_STATE_IDLE) {
        mProgressBarLoadMore.setVisibility(View.VISIBLE);
        mLabLoadMore.setVisibility(View.GONE);
        // mFooterView.setVisibility(View.VISIBLE);
        mIsLoadingMore = true;
        onLoadMore();
      }
    }

  }

  /**
   * Interface definition for a callback to be invoked when list reaches the
   * last item (the user load more items in the list)
   */
  public interface OnLoadMoreListener {
    /**
     * Called when the list reaches the last item (the last item is visible
     * to the user) A call to
     * {@link PullAndLoadListView #onLoadMoreComplete()} is expected to
     * indicate that the loadmore has completed.
     */
    public void onLoadMore();
  }
}

Java Source Code List

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