banner无限轮播+gridview

1.添加banner依赖：compile ‘com.youth.banner:banner:1.1.5’
2.添加权限：

3.布局就是一个banner+GridView了，注意设置GridView的android:numColumns=”“属性，不然还是会像ListView一样展示数据啦

4.然后就是MainAcitivity了：

public class MainActivity extends AppCompatActivity {

String path = "http://v3.wufazhuce.com:8000/api/reading/index/?version=3.5.0&platform=android";private Banner banner;private GridView gridView;List<String> banlist = new ArrayList<>();List<Shuju> list = new ArrayList<>();private Handler handler = new Handler() {    @Override    public void handleMessage(Message msg) {        super.handleMessage(msg);        if (msg.what == 0) {            try {                String s = (String) msg.obj;                list = new ArrayList<>();                banlist = new ArrayList<>();                //解析Json                JSONObject job = new JSONObject(s);                JSONObject dataobj = job.getJSONObject("data");                JSONArray essay = dataobj.getJSONArray("essay");                for (int i = 0; i < essay.length(); i++) {                    JSONObject job2 = essay.getJSONObject(i);                    JSONArray authorarray = job2.getJSONArray("author");                    for (int j = 0; j < authorarray.length(); j++) {                        JSONObject job3 = authorarray.getJSONObject(j);                        String user_name = job3.getString("user_name");                        String web_url = job3.getString("web_url");                        //封装                        Shuju shuju = new Shuju(user_name, web_url);                        list.add(shuju);                        banlist.add(web_url);                    }                }                    //无限轮播                    //设置加载样式                    banner.setIndicatorGravity(Banner.CENTER);                    banner.setBannerStyle(Banner.CIRCLE_INDICATOR_TITLE);                    //是否自动轮播                    banner.isAutoPlay(true);                    //设置轮播的时间间隔                    banner.setDelayTime(3000);                    //设置加载的图片，解析出来的url                    banner.setImages(banlist);                    //GridView适配器                    MyAdapter myAdapter = new MyAdapter(list, MainActivity.this);                    gridView.setAdapter(myAdapter);            } catch (Exception e) {                e.printStackTrace();            }        }    }};    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //获取控件        gridView = (GridView) findViewById(R.id.gridview);        banner = (Banner) findViewById(R.id.banner);        MyTask myTask = new MyTask();        myTask.execute(path);    }    //异步事务加载数据    class MyTask extends AsyncTask<String,Integer,String>{        //耗时操作        @Override        protected String doInBackground(String... params) {            //请求数据            String param = params[0];            try{                URL url = new URL(param);                HttpURLConnection con = (HttpURLConnection) url.openConnection();                con.setConnectTimeout(3000);                con.setRequestMethod("GET");                //判断响应码                if (con.getResponseCode() == 200){                    InputStream ins = con.getInputStream();                    ByteArrayOutputStream bos = new ByteArrayOutputStream();                    byte[] bytes = new byte[1024];                    int len = 0;                    while( (len = ins.read(bytes)) != -1 ){                        bos.write(bytes, 0 ,len);                    }                    ins.close();                    bos.close();                    //返回数据                    return bos.toString();                }            }catch (Exception e){                e.printStackTrace();            }            return null;        }        @Override        protected void onPostExecute(String s) {            Message msg = new Message();            msg.what = 0;            msg.obj = s;            handler.sendMessage(msg);            super.onPostExecute(s);        }    }

}

5.适配器：
public class MyAdapter extends BaseAdapter{

List<Shuju> list;Context con;public MyAdapter(List<Shuju> list, Context con) {    this.list = list;    this.con = con;}@Overridepublic int getCount() {    return list.size();}@Overridepublic Object getItem(int position) {    return list.get(position);}@Overridepublic long getItemId(int position) {    return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {    ViewHolder holder = new ViewHolder();    if (convertView == null){        convertView = View.inflate(con, R.layout.item, null);        holder.name = (TextView) convertView.findViewById(R.id.name);        holder.img = (ImageView) convertView.findViewById(R.id.web_img);        convertView.setTag(holder);    }else {        holder = (ViewHolder) convertView.getTag();    }    holder.name.setText(list.get(position).getUser_name());    //图片框架    DisplayImageOptions options = new DisplayImageOptions.Builder().cacheOnDisk(true).build();    ImageLoader.getInstance().displayImage(list.get(position).getWeb_url(), holder.img, options);    return convertView;}class ViewHolder{    ImageView img;    TextView name;}

}

6.ImageLoader添加的Application：
public class MyApplication extends Application{

@Overridepublic void onCreate() {    super.onCreate();    //配置全局    ImageLoaderConfiguration configuration = ImageLoaderConfiguration.createDefault(this);    //得到imageloader实例    ImageLoader.getInstance().init(configuration);}

}

注意添加依赖以及注册：
compile ‘com.nostra13.universalimageloader:universal-image-loader:1.9.2’
compile project(‘:imageloaderlibrary’)