PullToRefresh实现上拉刷新下拉加载

主Activity

public class MainActivity extends AppCompatActivity {
    PullToRefreshListView refresh_list_view;
    List<bean.ResultsBean> list = new ArrayList<bean.ResultsBean>();
    MyApdata myApdata ;
    boolean boo;
    int NUM=1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        refresh_list_view = (PullToRefreshListView) findViewById(R.id.refresh_list_view);
        refresh_list_view.setMode(PullToRefreshBase.Mode.BOTH);
        ILoadingLayout startLabels = refresh_list_view
                .getLoadingLayoutProxy(true, false);
        startLabels.setPullLabel("下拉刷新");
        startLabels.setRefreshingLabel("正在拉");
        startLabels.setReleaseLabel("放开刷新");
        ILoadingLayout endLabels = refresh_list_view.getLoadingLayoutProxy( false, true);
        endLabels.setPullLabel("上拉刷新");
        endLabels.setRefreshingLabel("正在载入...");
        endLabels.setReleaseLabel("放开刷新...");
       ListGson();
        refresh_list_view.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
            @Override
            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
                NUM++;
                boo = true;
               ListGson();
            }
            @Override
            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
                NUM++;
                boo = false
                ;
                ListGson();
            }
        });
    }
    public void ListGson(){
        new AsyncTask<String,String,String>(){
            @Override
            protected String doInBackground(String... strings) {
                String read = getNetDataStr();
                return read;
            }
            @Override
            protected void onPostExecute(String result) {
                super.onPostExecute(result);
                Gson gson = new Gson();
                bean bn = gson.fromJson(result, bean.class);
                list = bn.getResults();
                setAdapter(list);
                refresh_list_view.onRefreshComplete();
            }
        }.execute();
    }
    public void setAdapter(List<bean.ResultsBean> list){
        if(myApdata == null){
            myApdata = new MyApdata(list, MainActivity.this);
            refresh_list_view.setAdapter(myApdata);
        }else{
            myApdata.add(list,boo);
            myApdata.notifyDataSetChanged();
        }
    }
    public String getNetDataStr() {

        try {
            URL url = new URL(
                    "http://gank.io/api/data/Android/10/"+NUM);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            //设置
            conn.setRequestMethod("GET");
            conn.setReadTimeout(5000);
            conn.setConnectTimeout(5000);

            int code = conn.getResponseCode();
            if (code == 200) {
                InputStream is = conn.getInputStream();

                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                int len = -1;
                byte[] buff = new byte[1024];
                while((len = is.read(buff)) != -1){
                    bos.write(buff,0,len);
                }

               String json = new String(bos.toByteArray());
                Log.i("打印",json);
                return json;
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return "";
    }

}

适配器

public class MyApdata extends BaseAdapter {
    //构造参数
    private List<bean.ResultsBean> list;
    //创建上下文
    private Context context;
    public MyApdata(List<bean.ResultsBean> list, Context context) {
        this.list = list;
        this.context = context;
    }
    public void add(List<bean.ResultsBean> data, boolean b){
        for(bean.ResultsBean bean: data) {
            if (b){
                list.add(0,bean);
            }else{
                list.add(bean);
            }
        }
    }
    //有几个条目类型
    @Override
    public int getViewTypeCount() {
        return 2;
    }
    //判断怎样分辨每个条目的位置
    @Override
    public int getItemViewType(int position) {
        if(position%2==0){
            return 0;
        }else{
            return 1;
        }
    }

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

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

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

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        ViewHolder holder=null;
        int type = getItemViewType(i);
                if(view==null){
                    view=View.inflate(context,R.layout.itme_one,null);
                    holder=new ViewHolder();
                    holder.iv= (ImageView) view.findViewById(R.id.iv);
                    holder.tv1= (TextView) view.findViewById(R.id.tv1);
                    view.setTag(holder);
                }else{
                    holder= (ViewHolder) view.getTag();
                }
                holder.tv1.setText(list.get(i).getDesc());
                ImageLoader.getInstance().displayImage(list.get(i).getPublishedAt(),holder.iv);
        DisplayImageOptions build = new DisplayImageOptions.Builder()
                .cacheInMemory(true)
                .cacheOnDisk(true)
                .showImageForEmptyUri(R.mipmap.ic_launcher)
                .showImageOnFail(R.mipmap.ic_launcher)
                .showImageOnLoading(R.mipmap.ic_launcher)
                .build();
        return view;
    }
    //优化XlistView
    class ViewHolder{
        ImageView iv;
        TextView tv1 ;
    }
}
主布局文件

<com.handmark.pulltorefresh.library.PullToRefreshListView
    xmlns:ptr="http://schemas.android.com/apk/res-auto"
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:id="@+id/refresh_list_view"
    ptr:ptrDrawable="@drawable/default_ptr_flip"
    ptr:ptrAnimationStyle="flip"
    ptr:ptrHeaderBackground="#383838"
    ptr:ptrHeaderTextColor="#FFFFFF"  >
</com.handmark.pulltorefresh.library.PullToRefreshListView>

温馨提示:
PullToRefreshListView需要导第三方架包这是教程地址:http://www.cnblogs.com/qifengshi/p/5060827.html
记得联网权限和IMageLodae的清单文件配置