XListView下拉刷新,上拉加载和ListView多条目加载

自定义类,继承Application,加载缓冲

public class MyApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        File file = new File(Environment.getExternalStorageDirectory().getPath()+"Images0718");
        ImageLoaderConfiguration build = new ImageLoaderConfiguration.Builder(this)
                .memoryCacheExtraOptions(80, 80)
                .memoryCacheSize(2 * 1024 * 1024)
                .threadPoolSize(3)
                .threadPriority(1000)
                .diskCacheFileNameGenerator(new Md5FileNameGenerator())
                .diskCacheSize(50 * 1024 * 1024)
                .diskCache(new UnlimitedDiskCache(file))
                .build();
        ImageLoader.getInstance().init(build);
    }
}

public class MainActivity extends AppCompatActivity implements XListView.IXListViewListener {

    private XListView xlistview;
    private int index = 1;
    private boolean boo = false;
    private MyBaseAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        xlistview = (XListView) findViewById(R.id.xlistview);
        xlistview.setPullLoadEnable(true);
        xlistview.setXListViewListener(this);

        getData("http://apis.juhe.cn/cook/query.php", "26ef57b6568ddb188773d1c683879566", index +
                "", 5 + "", "鱼香肉丝");
    }

    private void getData(String path, String key, String pn, String rn, String name) {
        new AsyncTask<String, Void, String>() {
            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                if (s != null) {
                    Gson gson = new Gson();
                    MenuInfo info = gson.fromJson(s, MenuInfo.class);//MenuInfo是自定义JAVABean

                    List<MenuInfo.ResultBean.DataBean> list = info.getResult().getData();
                    if (adapter == null) {
                        adapter = new MyBaseAdapter(list);
                        xlistview.setAdapter(adapter);
                    } else {
                        adapter.addData(list, boo);
                        adapter.notifyDataSetChanged();
                    }
                }
            }

            @Override
            protected String doInBackground(String... params) {
                try {
                    String path = params[0];
                    String key = params[1];
                    String pn = params[2];
                    String rn = params[3];
                    String name = params[4];
                    URL url = new URL(path);
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("POST");
                    connection.setConnectTimeout(5000);
                    connection.setReadTimeout(5000);
                    OutputStream os = connection.getOutputStream();
                    os.write(("menu=" + name + "&key=" + key + "&pn=" + pn + "&rn=" + rn).getBytes());
                    os.flush();
                    os.close();
                    if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
                        InputStream is = connection.getInputStream();
                        return StringTools.getJson(is);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
                return null;
            }
        }.execute(path, key, pn, rn, name);
    }

    //    下拉刷新
    @Override
    public void onRefresh() {
        ++index;
        getData("http://apis.juhe.cn/cook/query.php", "26ef57b6568ddb188773d1c683879566", index +
                "", 5 + "", "鱼香肉丝");
        boo = true;
        xlistview.stopRefresh(true);
    }

    //    上啦加载
    @Override
    public void onLoadMore() {
        ++index;
        getData("http://apis.juhe.cn/cook/query.php", "26ef57b6568ddb188773d1c683879566", index +
                "", 5 + "", "鱼香肉丝");
        boo = false;
        xlistview.stopLoadMore();
    }

    //    自定义适配器
    class MyBaseAdapter extends BaseAdapter {
        private List<MenuInfo.ResultBean.DataBean> list;

        public MyBaseAdapter(List<MenuInfo.ResultBean.DataBean> list) {
            this.list = list;
        }

        //        自定义方法增加数据,true的时候从0下标开始增加,否则默认从listview的最后面加载数据
        public void addData(List<MenuInfo.ResultBean.DataBean> data, boolean b) {
            for (MenuInfo.ResultBean.DataBean bean : data) {
                if (b)
                    list.add(0, bean);
                else
                    list.add(bean);
            }
        }

        @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;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder0 holder0 = null;
            ViewHolder1 holder1 = null;
//            得到布局类型
            int type = getItemViewType(position);
//            设置布局
            switch (type) {
                case 0:
                    if (convertView == null) {
                        convertView = View.inflate(MainActivity.this, R.layout.item0, null);
                        holder0 = new ViewHolder0();
                        holder0.img = (ImageView) convertView.findViewById(R.id.img);
                        holder0.tv = (TextView) convertView.findViewById(R.id.textview);
                        convertView.setTag(holder0);
                    } else {
                        holder0 = (ViewHolder0) convertView.getTag();
                    }
                    break;
                case 1:
                    if (convertView == null) {
                        convertView = View.inflate(MainActivity.this, R.layout.item1, null);
                        holder1 = new ViewHolder1();
                        holder1.img = (ImageView) convertView.findViewById(R.id.img);
                        holder1.tv = (TextView) convertView.findViewById(R.id.textview);
                        convertView.setTag(holder1);
                    } else {
                        holder1 = (ViewHolder1) convertView.getTag();
                    }
                    break;
            }
//            给每一个布局设置数据
            switch (type) {
                case 0:
                    holder0.tv.setText(list.get(position).getIngredients());
                    DisplayImageOptions build = new DisplayImageOptions.Builder()
                            .cacheInMemory(true)
                            .cacheOnDisk(true)
                            .displayer(new CircleBitmapDisplayer())//设置显示的图片成圆形
                            .build();
                    ImageLoader.getInstance().displayImage(list.get(position).getAlbums().get(0),
                            holder0.img, build);
                    break;
                case 1:
                    holder1.tv.setText(list.get(position).getIngredients());
                    DisplayImageOptions build1 = new DisplayImageOptions.Builder()
                            .cacheInMemory(true)
                            .cacheOnDisk(true)
                            .displayer(new CircleBitmapDisplayer())//设置显示的图片成圆形
                            .build();
                    ImageLoader.getInstance().displayImage(list.get(position).getAlbums().get(0),
                            holder1.img, build1);
                    break;
            }
            return convertView;
        }

        // 设置每一个item的布局
        @Override
        public int getItemViewType(int position) {
            if (position % 2 == 0)
                return 0;
            else
                return 1;
        }

        //        这是布局类型的总数
        //这是return 2的话,下标就是0,1;
        @Override
        public int getViewTypeCount() {
            return 2;
        }
    }

    class ViewHolder0 {
        ImageView img;
        TextView tv;
    }

    class ViewHolder1 {
        ImageView img;
        TextView tv;
    }
}