private void updateListView(int position) { List<DownloadJob> jobs = null; switch (position) { case 1: jobs = mDownloadMan.getQueuedDownloads(); break; case 2: jobs = mDownloadMan.getCompletedDownloads(); break; default: jobs = mDownloadMan.getAllDownloads(); break; } if (lastNavPosition == position && jobs != null && jobs.size() == mAdapter.getCount()) { mAdapter.notifyDataSetChanged(); } else { mAdapter.setData((ArrayList<DownloadJob>) jobs); mListView.setVisibility(View.VISIBLE); mStateView.setVisibility(View.GONE); } mBar.setTitle("共" + mAdapter.getCount() + "个下载项"); if (jobs.isEmpty()) { mStateView.setText(getString(R.string.no_download)); mStateView.setVisibility(View.VISIBLE); mListView.setVisibility(View.GONE); } }
// @Override // public boolean onCreateOptionsMenu(Menu menu) { // menu.add(0,R.id.edit_query,0,"编辑").setIcon(R.drawable.ic_menu_mark).setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); // return true; // } @Override protected void onStart() { super.onStart(); mDownloadMan.registerDownloadObserver(this); mAdapter.notifyDataSetChanged(); }