Android UI列表的上拉下拉刷新之Android-PullToRefresh

Library下载地址：
https://github.com/chrisbanes/Android-PullToRefresh

版本：Android-PullToRefresh-2.1.1

（1）设置Listview
layout文件中定义PullToRefreshListView

<com.handmark.pulltorefresh.library.PullToRefreshListView    android:id="@+id/list_view"    android:layout_width="match_parent"    android:layout_height="match_parent" />

（2）设置Mode

PullToRefreshListView mListView = (PullToRefreshListView) findViewById(R.id.list_view);mListView.setMode(Mode.BOTH);

Mode.BOTH：同时支持上拉下拉
Mode.PULL_FROM_START：只支持下拉Pulling Down
Mode.PULL_FROM_END：只支持上拉Pulling Up

(3)实现Listener

如果Mode设置成Mode.BOTH，需要设置刷新Listener为OnRefreshListener2，并实现onPullDownToRefresh()、onPullUpToRefresh()两个方法。

如果Mode设置成Mode.PULL_FROM_START或Mode.PULL_FROM_END，需要设置刷新Listener为OnRefreshListener，同时实现onRefresh()方法。当然也可以设置为OnRefreshListener2，但是Mode.PULL_FROM_START的时候只调用onPullDownToRefresh()方法，Mode.PULL_FROM的时候只调用onPullUpToRefresh()方法.

(4)举例

public class MainActivity extends Activity {private ArrayList<String> mListItems;    private PullToRefreshListView mListView;    private SampleListAdapter mAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.sample);                // 设置初期数据        mListItems = new ArrayList<String>();    for (int i = 1; i <= 10; i++) {    mListItems.add("Item " + Integer.toString(i));    }        // 设置ListView        mListView = (PullToRefreshListView) findViewById(R.id.list_view);        mAdapter = new SampleListAdapter();        mListView.setAdapter(mAdapter);                // 设置PullToRefresh        mListView.setMode(Mode.BOTH);        mListView.setOnRefreshListener(new OnRefreshListener2<ListView>(){         // 下拉Pulling Down            @Override            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {            // 下拉的时候数据重置                mListItems = new ArrayList<String>();            for (int i = 1; i <= 10; i++) {            mListItems.add("Item " + Integer.toString(i));            }            mAdapter.notifyDataSetChanged();                            new FinishRefresh().execute();            }                        // 上拉Pulling Up            @Override            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {            // 上拉的时候添加选项                int count = mListItems.size();                mListItems.add("Item " + Integer.toString(++count));                mAdapter.notifyDataSetChanged();                                new FinishRefresh().execute();            }         });            }        private class SampleListAdapter extends BaseAdapter {             @Override        public int getCount() {            return mListItems.size();        }         @Override        public Object getItem(int index) {            return mListItems.get(index);        }         @Override        public long getItemId(int index) {            return index;        }         @Override        public View getView(int index, View view, ViewGroup arg2) {            if(view == null){                LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);                view = inflater.inflate(R.layout.list_item, null);            }            TextView textView = (TextView)view.findViewById(R.id.listItemText);            textView.setText(mListItems.get(index));            return view;        }    }     private class FinishRefresh extends AsyncTask<Void, Void, Void>{        @Override        protected Void doInBackground(Void... params) {            return null;        }         @Override        protected void onPostExecute(Void result){            mListView.onRefreshComplete();        }    }}

初期：

上拉：

上拉后：

下拉：

下拉后：

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