Android PullToRefresh上拉和下拉刷新

Github鏈接:

https://github.com/chrisbanes/Android-PullToRefresh

1. 設置Listview
layout文件中定義PullToRefreshListView

Xml代碼

1. android:id="@+id/list_view"
2. android:layout_width="match_parent"
3. android:layout_height="match_parent" />
   2. 設置Mode
   1. PullToRefreshListView mListView = (PullToRefreshListView) findViewById(R.id.list_view);
   2. mListView.setMode(Mode.BOTH); 可支持的Mode如下：
      
      • Mode.BOTH：同時支持上拉下拉
      • Mode.PULL_FROM_START：只支持下拉Pulling Down
      • Mode.PULL_FROM_END：只支持上拉Pulling Up 3. 實現監聽Listener
        如果Mode設置成Mode.BOTH，需要設置監聽OnRefreshListener2，並實現onPullDownToRefresh()、onPullUpToRefresh()兩個方法。
        
        

        如果Mode設置成Mode.PULL_FROM_START或Mode.PULL_FROM_END，需要設置監聽OnRefreshListener，同時實現onRefresh()方法。當然也可以設置為OnRefreshListener2，但是Mode.PULL_FROM_START的時候只調用onPullDownToRefresh()方法，Mode.PULL_FROM的時候只調用onPullUpToRefresh()方法。

        4. 具體代碼如下：
        1. public class MainActivity extends Activity {
        3. private ArrayList mListItems;
        4. private PullToRefreshListView mListView;
        5. private SampleListAdapter mAdapter;
        7. @Override
        8. protected void onCreate(Bundle savedInstanceState) {
        9. super.onCreate(savedInstanceState);
        10. setContentView(R.layout.sample);
        12. // 設置初期數據
        13. mListItems = new ArrayList();
        14. for (int i = 1; i <= 10; i++) {
        15. mListItems.add("Item " + Integer.toString(i));
        16. }
        18. // 設置ListView
        19. mListView = (PullToRefreshListView) findViewById(R.id.list_view);
        20. mAdapter = new SampleListAdapter();
        21. mListView.setAdapter(mAdapter);
        23. // 設置PullToRefresh
        24. mListView.setMode(Mode.BOTH);
        25. mListView.setOnRefreshListener(new OnRefreshListener2(){
        27. // 下拉Pulling Down
        28. @Override
        29. public void onPullDownToRefresh(PullToRefreshBase refreshView) {
        30. // 下拉的時候數據重置
        31. mListItems = new ArrayList();
        32. for (int i = 1; i <= 10; i++) {
        33. mListItems.add("Item " + Integer.toString(i));
        34. }
        35. mAdapter.notifyDataSetChanged();
        37. new FinishRefresh().execute();
        38. }
        40. // 上拉Pulling Up
        41. @Override
        42. public void onPullUpToRefresh(PullToRefreshBase refreshView) {
        43. // 上拉的時候添加選項
        44. int count = mListItems.size();
        45. mListItems.add("Item " + Integer.toString(++count));
        46. mAdapter.notifyDataSetChanged();
        48. new FinishRefresh().execute();
        49. }
        51. });
        53. }
        55. private class SampleListAdapter extends BaseAdapter {
        57. @Override
        58. public int getCount() {
        59. return mListItems.size();
        60. }
        62. @Override
        63. public Object getItem(int index) {
        64. return mListItems.get(index);
        65. }
        67. @Override
        68. public long getItemId(int index) {
        69. return index;
        70. }
        72. @Override
        73. public View getView(int index, View view, ViewGroup arg2) {
        74. if(view == null){
        75. LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        76. view = inflater.inflate(R.layout.list_item, null);
        77. }
        78. TextView textView = (TextView)view.findViewById(R.id.listItemText);
        79. textView.setText(mListItems.get(index));
        80. return view;
        81. }
        82. }
        84. private class FinishRefresh extends AsyncTask{
        85. @Override
        86. protected Void doInBackground(Void... params) {
        87. return null;
        88. }
        90. @Override
        91. protected void onPostExecute(Void result){
        92. mListView.onRefreshComplete();
        93. }
        94. }
        95. }