最简单的pulltorefresh例子

public final class PullToRefreshListActivity extends ListActivity {

	private LinkedList<String> mListItems;
	private PullToRefreshListView mPullRefreshListView;
	private ArrayAdapter<String> mAdapter;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_ptr_list);

		mPullRefreshListView = (PullToRefreshListView) findViewById(R.id.pull_refresh_list);
		mPullRefreshListView.setMode(Mode.BOTH);

		mPullRefreshListView.setOnRefreshListener(new OnRefreshListener2<ListView>() {

			@Override
			public void onPullDownToRefresh(
					PullToRefreshBase<ListView> refreshView) {
				String label = DateUtils.formatDateTime(getApplicationContext(), System.currentTimeMillis(),
						DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_ABBREV_ALL);

				// Update the LastUpdatedLabel
				refreshView.getLoadingLayoutProxy().setLastUpdatedLabel(label);

				// Do work to refresh the list here.
				new GetDataTask().execute();
				
			}

			@Override
			public void onPullUpToRefresh(
					PullToRefreshBase<ListView> refreshView) {
				String label = DateUtils.formatDateTime(getApplicationContext(), System.currentTimeMillis(),
						DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_ABBREV_ALL);

				// Update the LastUpdatedLabel
				refreshView.getLoadingLayoutProxy().setLastUpdatedLabel(label);

				// Do work to refresh the list here.
				new GetDataTask().execute();
				
			}
			
		});

		// Add an end-of-list listener
		mPullRefreshListView.setOnLastItemVisibleListener(new OnLastItemVisibleListener() {

			@Override
			public void onLastItemVisible() {
				Toast.makeText(PullToRefreshListActivity.this, "End of List!", Toast.LENGTH_SHORT).show();
			}
		});
		//Anything returned here has already been added to the content view
		ListView actualListView = mPullRefreshListView.getRefreshableView();

		// Need to use the Actual ListView when registering for Context Menu
		//可以用作举报，要进行注册
		registerForContextMenu(actualListView);

		mListItems = new LinkedList<String>();
		mListItems.addAll(Arrays.asList(mStrings));

		mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mListItems);

		//mPullRefreshListView.setOnPullEventListener(null);

		// You can also just use setListAdapter(mAdapter) or
		// mPullRefreshListView.setAdapter(mAdapter)
		actualListView.setAdapter(mAdapter);
	}

	private class GetDataTask extends AsyncTask<Void, Void, String[]> {

		@Override
		protected String[] doInBackground(Void... params) {
			// Simulates a background job.,可以查看定位 ？
			try {
				Thread.sleep(4000);
			} catch (InterruptedException e) {
			}
			return mStrings;
		}

		@Override
		protected void onPostExecute(String[] result) {
			mListItems.addFirst("Added after refresh...");
			mAdapter.notifyDataSetChanged();

			// Call onRefreshComplete when the list has been refreshed.
			mPullRefreshListView.onRefreshComplete();

			super.onPostExecute(result);
		}
	}

	//可以用户设置长按的，用来举报什么的
//	@Override
//	public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
//		AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
//	
//		menu.setHeaderTitle("Item: " + getListView().getItemAtPosition(info.position));
//		menu.add("Item 1");
//		menu.add("Item 2");
//		menu.add("Item 3");
//		menu.add("Item 4");
//
//		super.onCreateContextMenu(menu, v, menuInfo);
//	}


	private String[] mStrings = { "Abbaye de Belloc", "Abbaye du Mont des Cats", "Abertam", "Abondance", "Ackawi",
			"Acorn", "Adelost", "Affidelice au Chablis", "Afuega'l Pitu", "Airag", "Airedale", "Aisy Cendre",
			"Allgauer Emmentaler", "Abbaye de Belloc", "Abbaye du Mont des Cats", "Abertam", "Abondance", "Ackawi",
			"Acorn", "Adelost", "Affidelice au Chablis", "Afuega'l Pitu", "Airag", "Airedale", "Aisy Cendre",
			"Allgauer Emmentaler" };
}