android 下拉重新整理，上拉加載

:設定布局綁定library
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">


    <com.handmark.pulltorefresh.library.PullToRefreshListView
        android:id="@+id/listview_pull"
        xmlns:ptr="http://schemas.android.com/apk/res-auto"
        android:cacheColorHint="#00000000"
        android:fadingEdge="none"
        android:fastScrollEnabled="false"
        android:footerDividersEnabled="true"
        android:headerDividersEnabled="true"
        android:numColumns="3"
        android:smoothScrollbar="true"
        ptr:ptrAnimationStyle="rotate"
        ptr:ptrDrawable="@mipmap/ic_launcher"
        ptr:ptrHeaderBackground="#FFFF00"
        ptr:ptrHeaderTextColor="#FF0000"
        ptrRefreshableViewBackground="#CCCCCC"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

:擴充卡類view1.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.android.volley.toolbox.NetworkImageView
        android:layout_width="160dp"
        android:layout_height="114dp"
        android:layout_gravity="center_horizontal"
        android:gravity="center_horizontal"
        android:id="@+id/imageView" />

    <TextView
        android:id="@+id/coursename"
        android:textSize="14dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:gravity="center_horizontal"
        android:text="@string/item_name" />
</LinearLayout>

:ListView Head布局：view_head.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:src="@color/colorAccent"/>


</LinearLayout>

:加載圖檔工具類：
public class BitmapCache implements ImageCache{
    private LruCache<String, Bitmap> mCache;  

    @SuppressLint("NewApi") public BitmapCache() {  
        int maxSize =  *  * ;  
        mCache = new LruCache<String, Bitmap>(maxSize) {  
            @Override  
            protected int sizeOf(String key, Bitmap bitmap) {  
                return bitmap.getRowBytes() * bitmap.getHeight();  
            }  
        };  
    }  
    @Override
    public Bitmap getBitmap(String url) {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public void putBitmap(String url, Bitmap bitmap) {

    }
}

：Activity:
public class Fifth extends Activity {
    private PullToRefreshListView mPullToRefreshListView;
    private ArrayList<Item> list;//資料集合
    private String url = "url";//資料網址
    private RequestQueue requestQueue;
    private ListView mListView;
    private Adapter mAdapter;
    //資料類
    class Item {
        String coursename;//name
        String courseimg;//url
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.setContentView(R.layout.fifth);
        requestQueue = Volley.newRequestQueue(this);//Volley架構
        getData(url);//獲得資料
        mPullToRefreshListView = (PullToRefreshListView) findViewById(R.id.listview_pull);//找到元件
        mPullToRefreshListView.setMode(PullToRefreshBase.Mode.PULL_FROM_START);//設定重新整理模式，這裡為下拉
        mListView = mPullToRefreshListView.getRefreshableView();//擷取實際的ListView

        View view_head = getLayoutInflater().inflate(R.layout.view_head,null);
        mListView.addHeaderView(view_head);//ListView增加頭

        ILoadingLayout startLabels = mPullToRefreshListView
                .getLoadingLayoutProxy(true, false);
        startLabels.setPullLabel("正在載入...");// 剛下拉時，顯示的提示
        startLabels.setRefreshingLabel("正在重新整理...");// 重新整理時
        startLabels.setReleaseLabel("放開以重新整理...");// 下來達到一定距離時，顯示的提示

        /**
         * 單擊item事件
         */
        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Toast.makeText(getApplicationContext(),"============",Toast.LENGTH_LONG).show();
            }
        });
        //下拉監聽器
        mPullToRefreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener<ListView>() {
            @Override
            public void onRefresh(PullToRefreshBase<ListView> refreshView) {
                //執行異步
                new AsyncTask<Void,Void,Void>(){
                    @Override
                    protected Void doInBackground(Void... params) {
                        try {
                            getData(url);//重新請求資料
                            Thread.sleep();//重新整理停留兩秒
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        return null;
                    }

                    @Override
                    protected void onPostExecute(Void aVoid) {
                        super.onPostExecute(aVoid);
                        mAdapter.notifyDataSetChanged();//更新擴充卡

                        //long currentTime = System.currentTimeMillis();//獲得目前時間
                        SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");//格式化日期
                        Date data = new Date();
                        String str = sdf.format(data);

                        mPullToRefreshListView.getLoadingLayoutProxy().setLastUpdatedLabel(
                                str);//顯示更新時間

                        mPullToRefreshListView.onRefreshComplete();//通知ListView資料加載完畢
                        Toast.makeText(getApplicationContext(), "成功獲得新資料", Toast.LENGTH_LONG).show();
                    }
                }.execute();//異步執行
            }
        });

    }
    //獲得通過Volley架構獲得Json資料
    public void getData(String url) {
        JsonArrayRequest req = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
            @Override
            public void onResponse(JSONArray response) {
                list = new ArrayList<Item>();
                for (int i = ; i < response.length(); i++) {
                    try {
                        JSONObject obj = response.getJSONObject(i);
                        Item item = new Item();
                        item.coursename = obj.getString("coursename");
                        item.courseimg = obj.getString("courseimg");
                        list.add(item);
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
                mAdapter = new Adapter();//執行個體化擴充卡
                mListView.setAdapter(mAdapter);
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                VolleyLog.e("Error: ", error.getMessage());
            }
        });
        requestQueue.add(req);
    }
    //擴充卡
    class Adapter extends BaseAdapter {
        ImageLoader imageLoader = new ImageLoader(requestQueue, new BitmapCache());

        @Override
        public int getCount() {
            return list.size();
        }

        @Override
        public Object getItem(int position) {
            return list.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        class ViewHolder {
            TextView coursename;
            NetworkImageView imageView;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder viewHolder = null;
            if (convertView == null) {
                viewHolder = new ViewHolder();
                convertView = getLayoutInflater().inflate(R.layout.view1, null);
                viewHolder.coursename = (TextView) convertView.findViewById(R.id.coursename);
                viewHolder.imageView = (NetworkImageView) convertView.findViewById(R.id.imageView);
                convertView.setTag(viewHolder);
            } else {
                viewHolder = (ViewHolder) convertView.getTag();
            }

            viewHolder.coursename.setText(list.get(position).coursename);
            viewHolder.imageView.setImageUrl(list.get(position).courseimg, imageLoader);

            return convertView;
        }
    }
}

：效果圖：