okhttp 请求list数据实例

public class DataBean { ???/** ????* id : 61684 ????* movieName : 《猜火车2》先导预告片 ????* coverImg : http://img31.mtime.cn/mg/2016/07/26/143142.64770465.jpg ????* movieId : 228230 ????* url : http://vfx.mtime.cn/Video/2016/07/26/mp4/160726074707321432_480.mp4 ????* hightUrl : http://vfx.mtime.cn/Video/2016/07/26/mp4/160726074707321432.mp4 ????* videoTitle : 猜火车2 先导预告片 ????* videoLength : 46 ????* rating : 0 ????* type : ["剧情"] ????* summary : 苏格兰四兄弟回来了！ ????*/ ???private List<ItemData> trailers; ???public void setTrailers(List<ItemData> trailers) { ???????this.trailers = trailers; ???} ???public List<ItemData> getTrailers() { ???????return trailers; ???} ???public static class ItemData { ???????private int id; ???????private String movieName; ???????private String coverImg; ???????private int movieId; ???????private String url; ???????private String hightUrl; ???????private String videoTitle; ???????private int videoLength; ???????private int rating; ???????private String summary; ???????private List<String> type; ???????get set.... ???}}public class CacheUtils { ???/** ????* 保持数据 ????* @param context ????* @param key ????* @param values ????*/ ???public static ?void putString(Context context,String key,String values){ ???????SharedPreferences sharedPreferences = context.getSharedPreferences("atguigu",Context.MODE_PRIVATE); ???????sharedPreferences.edit().putString(key,values).commit(); ???} ???/** ????* 得到缓存的数据 ????* @param context ????* @param key ????* @return ????*/ ???public static String getString(Context context,String key){ ???????SharedPreferences sharedPreferences = context.getSharedPreferences("atguigu",Context.MODE_PRIVATE); ???????return ?sharedPreferences.getString(key,""); ???}}public class OKHttpListActivity ?extends Activity{ ???private static final String TAG = OKHttpListActivity.class.getSimpleName(); ???private ListView listView; ???private ProgressBar progressBar; ???private TextView tv_nodata; ???private OKHttpListAdapter adapter; ???private String url; ???@Override ???protected void onCreate(Bundle savedInstanceState) { ???????super.onCreate(savedInstanceState); ???????initView(); ???????getDataFromNet(); ???} ???private void getDataFromNet() { ?????????url = "http://api.m.mtime.cn/PageSubArea/TrailerList.api"; ???????//得到缓存的数据 ???????String saveJson = CacheUtils.getString(this,url); ???????if(!TextUtils.isEmpty(saveJson)){ ???????????processData(saveJson); ???????} ???????OkHttpUtils ???????????????.post() ???????????????.url(url) ???????????????.id(100) ???????????????.build() ???????????????.execute(new MyStringCallback()); ???} ???private void initView() { ???????setContentView(R.layout.activity_okhttplist); ???????tv_nodata = (TextView) findViewById(R.id.tv_nodata); ???????listView = (ListView) findViewById(R.id.listview); ???????progressBar = (ProgressBar) findViewById(R.id.progressBar); ???} ???public class MyStringCallback extends StringCallback { ???????@Override ???????public void onBefore(Request request, int id) { ???????????setTitle("loading..."); ???????} ???????@Override ???????public void onAfter(int id) { ???????????setTitle("Sample-okHttp"); ???????} ???????@Override ???????public void onError(Call call, Exception e, int id) { ???????????e.printStackTrace(); ??????????tv_nodata.setVisibility(View.VISIBLE); ???????} ???????@Override ???????public void onResponse(String response, int id) { ???????????Log.e(TAG, "onResponse：complete"); ???????????tv_nodata.setVisibility(View.GONE); ???????????switch (id) { ???????????????case 100: ???????????????????Toast.makeText(OKHttpListActivity.this, "http", Toast.LENGTH_SHORT).show(); ???????????????????break; ???????????????case 101: ???????????????????Toast.makeText(OKHttpListActivity.this, "https", Toast.LENGTH_SHORT).show(); ???????????????????break; ???????????} ???????????//解析数据和显示数据 ???????????if(response != null){ ???????????????//缓存数据 ???????????????CacheUtils.putString(OKHttpListActivity.this,url,response); ???????????????processData(response); ???????????} ???????} ???????@Override ???????public void inProgress(float progress, long total, int id) { ???????????Log.e(TAG, "inProgress:" + progress); ???????} ???} ???/** ????* 解析和显示数据 ????* @param json ????*/ ???private void processData(String json) { ???????//解析数据 ???????DataBean dataBean = parsedJson(json); ???????List<DataBean.ItemData> datas = ?dataBean.getTrailers(); ???????if(datas != null && datas.size() >0){ ???????????//有数据 ???????????tv_nodata.setVisibility(View.GONE); ???????????//显示适配器 ???????????adapter = new OKHttpListAdapter(OKHttpListActivity.this,datas); ???????????listView.setAdapter(adapter); ???????}else{ ???????????//没有数据 ???????????tv_nodata.setVisibility(View.VISIBLE); ???????} ???????progressBar.setVisibility(View.GONE); ???} ???/** ????* 解析json数据 ????* ????* @param response ????* @return ????*/ ???private DataBean parsedJson(String response) { ???????DataBean dataBean = new DataBean(); ???????try { ???????????JSONObject jsonObject = new JSONObject(response); ???????????JSONArray jsonArray = jsonObject.optJSONArray("trailers"); ???????????if (jsonArray != null && jsonArray.length() > 0) { ???????????????List<DataBean.ItemData> trailers = new ArrayList<>(); ???????????????dataBean.setTrailers(trailers); ???????????????for (int i = 0; i < jsonArray.length(); i++) { ???????????????????JSONObject jsonObjectItem = (JSONObject) jsonArray.get(i); ???????????????????if (jsonObjectItem != null) { ???????????????????????DataBean.ItemData mediaItem = new DataBean.ItemData(); ???????????????????????String movieName = jsonObjectItem.optString("movieName");//name ???????????????????????mediaItem.setMovieName(movieName); ???????????????????????String videoTitle = jsonObjectItem.optString("videoTitle");//desc ???????????????????????mediaItem.setVideoTitle(videoTitle); ???????????????????????String imageUrl = jsonObjectItem.optString("coverImg");//imageUrl ???????????????????????mediaItem.setCoverImg(imageUrl); ???????????????????????String hightUrl = jsonObjectItem.optString("hightUrl");//data ???????????????????????mediaItem.setHightUrl(hightUrl); ???????????????????????//把数据添加到集合 ???????????????????????trailers.add(mediaItem); ???????????????????} ???????????????} ???????????} ???????} catch (JSONException e) { ???????????e.printStackTrace(); ???????} ???????return dataBean; ???}}public class OKHttpListAdapter extends BaseAdapter { ???private final Context context; ???private final List<DataBean.ItemData> datas; ???public OKHttpListAdapter(Context context,List<DataBean.ItemData> datas){ ???????this.context = context; ???????this.datas = datas; ???} ???@Override ???public int getCount() { ???????return datas.size(); ???} ???@Override ???public Object getItem(int position) { ???????return null; ???} ???@Override ???public long getItemId(int position) { ???????return 0; ???} ???@Override ???public View getView(int position, View convertView, ViewGroup parent) { ???????final ViewHolder viewHolder; ???????if(convertView ==null){ ???????????convertView = View.inflate(context, R.layout.item_okhttp_list_image,null); ???????????viewHolder = new ViewHolder(); ???????????viewHolder.iv_icon = (ImageView) convertView.findViewById(R.id.iv_icon); ???????????viewHolder.tv_name = (TextView) convertView.findViewById(R.id.tv_name); ???????????viewHolder.tv_desc = (TextView) convertView.findViewById(R.id.tv_desc); ???????????convertView.setTag(viewHolder); ???????}else{ ???????????viewHolder = (ViewHolder) convertView.getTag(); ???????} ???????//根据位置得到数据 ???????DataBean.ItemData itemData = datas.get(position); ???????viewHolder.tv_name.setText(itemData.getMovieName()); ???????viewHolder.tv_desc.setText(itemData.getVideoTitle()); ???????//在列表中使用okhttp-utils请求图片 ???????OkHttpUtils ???????????????.get()// ???????????????.url(itemData.getCoverImg())// ???????????????.tag(this)// ???????????????.build()// ???????????????.connTimeOut(20000) ???????????????.readTimeOut(20000) ???????????????.writeTimeOut(20000) ???????????????.execute(new BitmapCallback() { ???????????????????@Override ???????????????????public void onError(Call call, Exception e, int id) {// ???????????????????????tv_result.setText("onError:" + e.getMessage()); ???????????????????} ???????????????????@Override ???????????????????public void onResponse(Bitmap bitmap, int id) { ???????????????????????Log.e("TAG", "onResponse：complete"); ???????????????????????viewHolder.iv_icon.setImageBitmap(bitmap); ???????????????????} ???????????????}); ???????return convertView; ???} ???static class ViewHolder{ ???????ImageView iv_icon; ???????TextView tv_name; ???????TextView tv_desc; ???}}