Android PullToRefresh上拉和下拉刷新

Github鏈接:

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

GUIDE：

https://github.com/chrisbanes/Android-PullToRefresh/wiki/Quick-Start-Guide

1. 設置Listview 
layout文件中定義PullToRefreshListView 

Xml代碼

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

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

• 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

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。

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);  

    // 設置初期數據  
    mListItems = new ArrayList<String>();  
    for (int i = 1; i <= 10; i++) {  
        mListItems.add("Item " + Integer.toString(i));  
    }  

    // 設置ListView  
    mListView = (PullToRefreshListView) findViewById(R.id.list_view);  
    mAdapter = new SampleListAdapter();  
    mListView.setAdapter(mAdapter);  

    // 設置PullToRefresh  
    mListView.setMode(Mode.BOTH);  
    mListView.setOnRefreshListener(new OnRefreshListener2<ListView>(){  

        // 下拉Pulling Down  
        @Override  
        public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {  
            // 下拉的時候數據重置  
            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) {  
            // 上拉的時候添加選項  
            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();  
    }  
}  

}</pre>