Android 图文数据JSON解析，金山词霸每日一句API的调用

金山词霸开发的免费API http://open.iciba.com/dsapi/

数据格式为

{"sid":"737",
"tts":"http:\/\/news.iciba.com\/admin\/tts\/2013-12-11.mp3",
"content":"I don't want us to be together because we have to,I want us to be together because we want to.",
"note":"\u6211\u4e0d\u5e0c\u671b\u6211\u4eec\u56e0\u4e3a\u201c\u4e0d\u5f97\u4e0d\u201d\u800c\u5728\u4e00\u8d77\uff0c\u6211\u5e0c\u671b\u6211\u4eec\u662f\u56e0\u4e3a\u60f3\u5728\u4e00\u8d77\u800c\u5728\u4e00\u8d77\u3002",
"translation":"\u611f\u8c22@\u7a0b\u5f88\u591a\u8981\u79d2\u8650\u6570\u5b66 \u6295\u7a3f\u3002\u8bcd\u9738\u5c0f\u7f16\uff0c\u8fd9\u53e5\u8bdd\u6765\u81ea\u300a\u51b0\u6cb3\u4e16\u7eaa2\u300b\uff0c\u662f\u4e00\u4e2a\u7cfb\u5217\u7684\u52a8\u753b\u7535\u5f71\uff0c\u975e\u5e38\u641e\u7b11\uff0c\u4f60\u770b\u8fc7\u5417\uff1f",
"picture":"http:\/\/cdn.iciba.com\/news\/word\/2013-12-11.jpg","picture2":"http:\/\/cdn.iciba.com\/news\/word\/big_2013-12-11b.jpg","caption":"\u8bcd\u9738\u6bcf\u65e5\u4e00\u53e5", "dateline":"2013-12-11", "s_pv":"8693", "sp_pv":"2090", "tags":[{"id":"9","name":"\u7231\u60c5"},{"id":"14","name":"\u7535\u5f71\u7ecf\u5178"}], "fenxiang_img":"http:\/\/cdn.iciba.com\/web\/news\/longweibo\/imag\/2013-12-11.jpg"}

 

JSON字段解释

JSON 字段解释
{
'sid':'' #每日一句ID
'tts': '' #音频地址
'content':'' #英文内容
'note': '' #中文内容
'translation':'' #词霸小编 'picture': '' #图片地址 'picture2': '' #大图片地址 'caption':'' #标题 'dateline':'' #时间 's_pv':'' #浏览数 'sp_pv':'' #语音评测浏览数 'tags':'' #相关标签 'fenxiang_img':'' #合成图片，建议分享微博用的 }

最终实现的效果

具体实现，使用AsynTask异步访问网络：

class Load extends AsyncTask
    {
        public String url = "http://open.iciba.com/dsapi/";
        ProgressDialog pdlg;
        String jsonstr = ""; JSONObject json = null; @Override protected String doInBackground(String... params) { // TODO Auto-generated method stub try{ DefaultHttpClient httpClient = new DefaultHttpClient(); HttpPost httppost = new HttpPost(url); HttpResponse httpResponse = httpClient.execute(httppost); HttpEntity httpEntity = httpResponse.getEntity(); InputStream is = httpEntity.getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8")); StringBuilder sb = new StringBuilder(); String line = null; while ((line = reader.readLine()) != null) { sb.append(line + "\n"); } is.close(); jsonstr = sb.toString(); json = new JSONObject(jsonstr.toString()); engstr = json.getString("content"); chistr = json.getString("note"); imagurl = json.getString("picture"); timestr = json.getString("dateline"); fromstr = json.getString("translation"); JSONArray array = json.getJSONArray("tags"); for(int i=0;i) { JSONObject tag = (JSONObject)array.get(i); tagstr += tag.getString("name")+"," ; } }catch(Exception e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(String result) { // TODO Auto-generated method stub super.onPostExecute(result); pdlg.dismiss(); imageLoader.DisplayImage(imagurl,imageview); eng.setText(" "+engstr); chi.setText(" "+chistr); tag.setText(tagstr); time.setText(timestr); from.setText(" "+fromstr); } @Override protected void onPreExecute() { // TODO Auto-generated method stub super.onPreExecute(); pdlg = new ProgressDialog(context); pdlg.setCancelable(false); pdlg.setMessage("正在加载"); pdlg.show(); } }

使用了一个图片处理的工具类，ImageLoader,主要用来通过url解析图片，处理图片的大小，以文件的形式缓存图片。

public class ImageLoader {
    
    MemoryCache memoryCache=new MemoryCache();
    FileCache fileCache;
    private Map imageViews=Collections.synchronizedMap(new WeakHashMap()); ExecutorService executorService; public ImageLoader(Context context){ fileCache=new FileCache(context); executorService=Executors.newFixedThreadPool(5); } final int stub_id = R.drawable.drug_trans; public void DisplayImage(String url, ImageView imageView) { imageViews.put(imageView, url); Bitmap bitmap=memoryCache.get(url); if(bitmap!=null) imageView.setImageBitmap(bitmap); else { queuePhoto(url, imageView); imageView.setImageResource(stub_id); } } private void queuePhoto(String url, ImageView imageView) { PhotoToLoad p=new PhotoToLoad(url, imageView); executorService.submit(new PhotosLoader(p)); } private Bitmap getBitmap(String url) { File f=fileCache.getFile(url); //from SD cache Bitmap b = decodeFile(f); if(b!=null) return b; //from web try { Bitmap bitmap=null; URL imageUrl = new URL(url); HttpURLConnection conn = (HttpURLConnection)imageUrl.openConnection(); conn.setConnectTimeout(30000); conn.setReadTimeout(30000); conn.setInstanceFollowRedirects(true); InputStream is=conn.getInputStream(); OutputStream os = new FileOutputStream(f); Utils.CopyStream(is, os); os.close(); bitmap = decodeFile(f); return bitmap; } catch (Exception ex){ ex.printStackTrace(); return null; } } //decodes image and scales it to reduce memory consumption private Bitmap decodeFile(File f){ try { //decode image size BitmapFactory.Options o = new BitmapFactory.Options(); o.inJustDecodeBounds = true; BitmapFactory.decodeStream(new FileInputStream(f),null,o); //Find the correct scale value. It should be the power of 2. final int REQUIRED_SIZE=70; int width_tmp=o.outWidth, height_tmp=o.outHeight; int scale=1; while(true){ if(width_tmp/1.5REQUIRED_SIZE) break; width_tmp/=1.5; height_tmp/=1.5; scale*=1.5; } //decode with inSampleSize BitmapFactory.Options o2 = new BitmapFactory.Options(); o2.inSampleSize=scale; return BitmapFactory.decodeStream(new FileInputStream(f), null, o2); } catch (FileNotFoundException e) {} return null; } //Task for the queue private class PhotoToLoad { public String url; public ImageView imageView; public PhotoToLoad(String u, ImageView i){ url=u; imageView=i; } } class PhotosLoader implements Runnable { PhotoToLoad photoToLoad; PhotosLoader(PhotoToLoad photoToLoad){ this.photoToLoad=photoToLoad; } @Override public void run() { if(imageViewReused(photoToLoad)) return; Bitmap bmp=getBitmap(photoToLoad.url); memoryCache.put(photoToLoad.url, bmp); if(imageViewReused(photoToLoad)) return; BitmapDisplayer bd=new BitmapDisplayer(bmp, photoToLoad); Activity a=(Activity)photoToLoad.imageView.getContext(); a.runOnUiThread(bd); } } boolean imageViewReused(PhotoToLoad photoToLoad){ String tag=imageViews.get(photoToLoad.imageView); if(tag==null || !tag.equals(photoToLoad.url)) return true; return false; } //Used to display bitmap in the UI thread class BitmapDisplayer implements Runnable { Bitmap bitmap; PhotoToLoad photoToLoad; public BitmapDisplayer(Bitmap b, PhotoToLoad p){bitmap=b;photoToLoad=p;} public void run() { if(imageViewReused(photoToLoad)) return; if(bitmap!=null) photoToLoad.imageView.setImageBitmap(bitmap); else photoToLoad.imageView.setImageResource(stub_id); } } public void clearCache() { memoryCache.clear(); fileCache.clear(); } }

 

转载于:https://www.cnblogs.com/lonng226/articles/4207754.html