在Android的gridview的分页 [英] Gridview pagination in android

问题描述

我检索文本+图片来自DB和在一个gridview.ieeach gridview的细胞显示它由一个图像的加一个text.Now我做分页为that.i've以允许其显示每4个细胞page.How我能做到这一点？实例链接或code是多少AP preciated。

i retrieved texts+images from DB and displayed it in a gridview.i.e.each gridview cell consists of one image+one text.Now i've to do pagination for that.i've to allow it to display 4 cells per page.How could i do that?Example link or code is much appreciated.

推荐答案

这是什么亚姆在我的应用程序之一做。希望它帮助。

This is what iam doing in one of my apps. Hope it helps.

public static int currentPage = 0;
private boolean endOfAlbums = false;
private int lastItem = 0;

albumGrid.setOnScrollListener(new AbsListView.OnScrollListener() {
                @Override
                public void onScrollStateChanged(AbsListView absListView, int scrollState) {
                    // Pause fetcher to ensure smoother scrolling when flinging // You can ignore this part
                    if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_FLING) {
                        mImageFetcher.setPauseWork(true);
                    } else {
                        mImageFetcher.setPauseWork(false);
                    }
                }

                @Override
                public void onScroll(AbsListView absListView, int firstVisibleItem, int visibleItemCount, int totalItemCount) {

                    final int _lastItem = firstVisibleItem + visibleItemCount;
                    if (_lastItem > 0 && totalItemCount > 0)
                        if (_lastItem == albums.size() && !endOfAlbums && lastItem != _lastItem) {
                            lastItem = _lastItem;
                            // Last item is fully visible.
                            loadAlbums();
                        }
                }
            });

            return view;
        }

        private void loadAlbums() {

            if (currentPage == 0) {
                albums.clear();
                endOfAlbums = false;
                lastItem = 0;
                // get new releases
                progressLayout.setVisibility(View.VISIBLE);
            } else
                progressLoadMore.setVisibility(View.VISIBLE);

            if (Utility.isNetworkAvailable(getActivity())) {

                new Thread(new Runnable() {
                    @Override
                    public void run() {

                        // get the serverAlbums
                        ArrayList<Album> serverAlbums = ServerAPI.getAllAlbums(session.getLanguage(), currentPage);
                        if (serverAlbums.size() > 0)
                            albums.addAll(serverAlbums);
                        else
                            endOfAlbums = true;

                        currentPage++;

                        myHandler.post(updateRunnable);
                    }
                }).start();
                updateRunnable = new Runnable() {
                    @Override
                    public void run() {

                        if (albums.size() > 0) {

                            imageAdapter.notifyDataSetChanged();
                            // get listview current position - used to maintain scroll position
                            int currentPosition = albumGrid.getFirstVisiblePosition();

                            // Setting new scroll position
                            albumGrid.smoothScrollToPosition(currentPosition + 1, 0);
                        } else
                            tvNoAlbums.setVisibility(View.VISIBLE);

                        progressLayout.setVisibility(View.GONE);
                        progressLoadMore.setVisibility(View.GONE);
                    }
                };
            } else {
                Toast.makeText(getActivity(), R.string.check_connectivity, Toast.LENGTH_SHORT).show();
                progressLayout.setVisibility(View.GONE);
                progressLoadMore.setVisibility(View.GONE);
            }

        }

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