XlistView的使用加XlistView的多布局

XlistViewDemo通过网络获取数据 解析json字符串 通过Xlistview多布局展示

首先下载XlistView的源码 下面的是地址

https://github.com/Maxwin-z/XListView-Android

将源码复制到自己的代码中  各种布局  图片 也用源码中的

首先是布局

<view.XListView    android:id="@+id/lv"    android:layout_width="wrap_content"    android:layout_height="wrap_content"/>

实现XlistView的接口

public class MainActivity extends AppCompatActivity implements XListView.IXListViewListener{    private List<News2> list;    private XListView lv;//定义你要获取数据的地址 private  String geturl="http://v.juhe.cn/toutiao/index?key=22a108244dbb8d1f49967cd74a0c144d";    private String title;    private String thumbnail_pic_s;    private NewsAdapter adapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initImageLoader();        initView();        inviData();//通过AsyncTask获取网络数据        new MyAsyncTask().execute(geturl);    }//图片是通过Imageloader来获取    public void initImageLoader() {        //构建者模式        DisplayImageOptions options=new DisplayImageOptions.Builder()                .cacheOnDisk(true)//允许磁盘缓存                .cacheInMemory(true)//允许内存缓存                .showImageForEmptyUri(R.drawable.ic_empty)//uri为空时 设置默认图片                .showImageOnFail(R.drawable.ic_error)//失败时 设置图片                .showImageOnLoading(R.drawable.ic_loading)//下载时 设置图片                .bitmapConfig(Bitmap.Config.RGB_565)//设置bitmap的类型                .displayer(new RoundedBitmapDisplayer(60))                .build();        ImageLoaderConfiguration config=new ImageLoaderConfiguration.Builder(this)                .writeDebugLogs()//打印                .diskCacheSize(5*1024*1024)//设置磁盘内存大小                .memoryCacheSize(5*1024*1024)//设置内存大小                .threadPoolSize(5)//设置线程池多大 5个线程同时下载图片                .threadPriority(6) //线程的优先级                .diskCacheFileNameGenerator(new Md5FileNameGenerator())//缓存图片进行加密                .defaultDisplayImageOptions(options)//把options给config                .build();        //初始化ImageLoder        ImageLoader.getInstance().init(config);    }    private void inviData() {        adapter = new NewsAdapter(this,list);        lv.setAdapter(adapter);    }//异步加载数据     class MyAsyncTask extends AsyncTask<String, Void, String> {        private StringBuffer result;        @Override        protected String doInBackground(String... strings) {            result = new StringBuffer();            try {                URL url = new URL(strings[0]);                HttpURLConnection connection = (HttpURLConnection) url.openConnection();                connection.setRequestMethod("GET");                connection.connect();                if (200 == connection.getResponseCode()) {                    InputStream inputStream = connection.getInputStream();                    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));                    String line = null;                    while ((line=bufferedReader.readLine()) != null) {                        result.append(line);                    }                }            } catch (Exception e) {                e.printStackTrace();            }            return result.toString();        }        @Override        protected void onPostExecute(String s) {            super.onPostExecute(s);            parseData(s);            adapter.notifyDataSetChanged();//下拉刷新后消失            lv.stopRefresh();//上拉加载后消失 lv.stopLoadMore();        }    }//解析json字符串    private void parseData(String s) {        Gson gson=new Gson();        News news = gson.fromJson(s, News.class);        News.ResultBean result = news.result;        List<News.ResultBean.DataBean> data = result.data;        for (int i = 0; i < data.size(); i++) {            News.ResultBean.DataBean dataBean = data.get(i);            title = dataBean.title;            thumbnail_pic_s = dataBean.thumbnail_pic_s;            News2 news2=new News2(title,thumbnail_pic_s);            list.add(news2);        }    }//初始化控件  private void initView() {        lv = (XListView) findViewById(R.id.lv);        list = new ArrayList<>();        lv.setPullLoadEnable(true);//xlistView可以下拉刷新        lv.setXListViewListener(this); //必须实现这个接口 必须给接口才能使用    }    @Override    public void onRefresh() {list.clear();        new MyAsyncTask().execute(geturl);    }    @Override    public void onLoadMore() {        new MyAsyncTask().execute(geturl);    }}

 

XlistView适配器的实现

public class NewsAdapter extends BaseAdapter {    private Context context;    private List<News2> list;    private final int atype=0;//第一种布局    private final int btype=1;//第二种布局    private final int type_num=2; //布局的总数    public NewsAdapter(Context context, List<News2> list) {        this.context = context;        this.list = list;    }    @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;    }//获取listView的多种布局 模拟两种布局    @Override    public int getItemViewType(int position) {        if(position%2==0)        {            return atype;        }        else        {            return btype;        }    }//获取布局的总数    @Override    public int getViewTypeCount() {        return type_num;    }//xlistView的优化    @Override    public View getView(int i, View view, ViewGroup viewGroup) {        //获取布局类型        int type = getItemViewType(i);        ViewHolder1 holder1=null;        ViewHolder2 holder2=null;        if(view==null)        {    //判断布局            switch (type)            {                case atype:                    holder1=new ViewHolder1();                    view = View.inflate(context, R.layout.item1, null);                    holder1.tv_title=view.findViewById(R.id.tv_title);                    holder1.iv=view.findViewById(R.id.iv);                    view.setTag(holder1);                    break;                case btype:                    holder2=new ViewHolder2();                    view = View.inflate(context, R.layout.item2, null);                    holder2.tv_title2=view.findViewById(R.id.tv_title2);                    holder2.iv2=view.findViewById(R.id.iv2);                    view.setTag(holder2);                    break;            }        }else        {            switch (type)            {                case atype:                    holder1= (ViewHolder1) view.getTag();                    holder1.tv_title.setText(list.get(i).getTitle());//使用ImageLoader实现图片的加载 ImageLoader.getInstance().displayImage(list.get(i).getThumbnail_pic_s(),holder1.iv);                    break;                case btype:                    holder2= (ViewHolder2) view.getTag();                    holder2.tv_title2.setText(list.get(i).getTitle());                    ImageLoader.getInstance().displayImage(list.get(i).getThumbnail_pic_s(),holder2.iv2);                    break;            }        }        return view;    }    class ViewHolder1{        TextView tv_title;        ImageView iv;    }    class ViewHolder2{        TextView tv_title2;        ImageView iv2;    }}