I get data from a JSON Array, and I can show text in text images, but with problems displaying images.
here is the main action:
public class test extends ListActivity { // url to make request private static String url = "http://test/json.php"; // JSON Node names private static final String CONTACTS = "contacts"; private static final String NAME = "name"; private static final String IMAGE = "image"; // contacts JSONArray JSONArray contacts = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // Hashmap for ListView ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>(); // Creating JSON Parser instance JSONParser jParser = new JSONParser(); // getting JSON string from URL JSONObject json = jParser.getJSONFromUrl(url); try { // Getting Array of Contacts contacts = json.getJSONArray(CONTACTS); // looping through All Contacts for(int i = 0; i < contacts.length(); i++){ JSONObject c = contacts.getJSONObject(i); // Storing each json item in variable String name = c.getString(NAME); String image = c.getString(IMAGE); // creating new HashMap HashMap<String, String> map = new HashMap<String, String>(); // adding each child node to HashMap key => value map.put(NAME, name); map.put(IMAGE, image); // adding HashList to ArrayList contactList.add(map); } } catch (JSONException e) { e.printStackTrace(); } testAdapter adapter = new testAdapter( test.this, contactList, R.layout.list_item, new String[] {}, new int[] {}); // updating listview setListAdapter(adapter); }
and here is my adapter class:
public class testAdapter extends SimpleAdapter { private Context mContext; public ImageLoader imageLoader; public LayoutInflater inflater=null; public testAdapter(Context context, List<? extends Map<String, ?>> data, int resource, String[] from, int[] to) { super(context, data, resource, from, to); mContext = context; inflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); imageLoader=new ImageLoader(mContext.getApplicationContext()); } @Override public View getView(int position, View convertView, ViewGroup parent) { View vi=convertView; if(convertView==null) vi = inflater.inflate(R.layout.list_item, null); HashMap<String, Object> data = (HashMap<String, Object>) getItem(position); TextView text = (TextView)vi.findViewById(R.id.name); String name = (String) data.get(NAME); text.setText(name); ImageView image=(ImageView)vi.findViewById(R.id.imageView1); imageLoader.DisplayImage(IMAGE, (Activity)mContext, image); return vi; } } }
and here is imageLoader:
public class ImageLoader { MemoryCache memoryCache=new MemoryCache(); FileCache fileCache; private Map<ImageView, String> imageViews=Collections.synchronizedMap(new WeakHashMap<ImageView, String>()); public ImageLoader(Context context){ photoLoaderThread.setPriority(Thread.NORM_PRIORITY-1); fileCache=new FileCache(context); } final int stub_id=R.drawable.ic_launcher; public void DisplayImage(String url, Activity activity, ImageView imageView) { imageViews.put(imageView, url); Bitmap bitmap=memoryCache.get(url); if(bitmap!=null) imageView.setImageBitmap(bitmap); else { queuePhoto(url, activity, imageView); imageView.setImageResource(stub_id); } } private void queuePhoto(String url, Activity activity, ImageView imageView) { photosQueue.Clean(imageView); PhotoToLoad p=new PhotoToLoad(url, imageView); synchronized(photosQueue.photosToLoad){ photosQueue.photosToLoad.push(p); photosQueue.photosToLoad.notifyAll(); } if(photoLoaderThread.getState()==Thread.State.NEW) photoLoaderThread.start(); } private Bitmap getBitmap(String url) { File f=fileCache.getFile(url); Bitmap b = decodeFile(f); if(b!=null) return b; try { Bitmap bitmap=null; URL imageUrl = new URL(url); HttpURLConnection conn = (HttpURLConnection)imageUrl.openConnection(); conn.setConnectTimeout(30000); conn.setReadTimeout(30000); 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; } } private Bitmap decodeFile(File f){ try { BitmapFactory.Options o = new BitmapFactory.Options(); o.inJustDecodeBounds = true; BitmapFactory.decodeStream(new FileInputStream(f),null,o); final int REQUIRED_SIZE=70; int width_tmp=o.outWidth, height_tmp=o.outHeight; int scale=1; while(true){ if(width_tmp/2<REQUIRED_SIZE || height_tmp/2<REQUIRED_SIZE) break; width_tmp/=2; height_tmp/=2; scale*=2; } BitmapFactory.Options o2 = new BitmapFactory.Options(); o2.inSampleSize=scale; return BitmapFactory.decodeStream(new FileInputStream(f), null, o2); } catch (FileNotFoundException e) {} return null; } private class PhotoToLoad { public String url; public ImageView imageView; public PhotoToLoad(String u, ImageView i){ url=u; imageView=i; } } PhotosQueue photosQueue=new PhotosQueue(); public void stopThread() { photoLoaderThread.interrupt(); } class PhotosQueue { private Stack<PhotoToLoad> photosToLoad=new Stack<PhotoToLoad>(); public void Clean(ImageView image) { for(int j=0 ;j<photosToLoad.size();){ if(photosToLoad.get(j).imageView==image) photosToLoad.remove(j); else ++j; } } } class PhotosLoader extends Thread { public void run() { try { while(true) { if(photosQueue.photosToLoad.size()==0) synchronized(photosQueue.photosToLoad){ photosQueue.photosToLoad.wait(); } if(photosQueue.photosToLoad.size()!=0) { PhotoToLoad photoToLoad; synchronized(photosQueue.photosToLoad){ photoToLoad=photosQueue.photosToLoad.pop(); } Bitmap bmp=getBitmap(photoToLoad.url); memoryCache.put(photoToLoad.url, bmp); String tag=imageViews.get(photoToLoad.imageView); if(tag!=null && tag.equals(photoToLoad.url)){ BitmapDisplayer bd=new BitmapDisplayer(bmp, photoToLoad.imageView); Activity a=(Activity)photoToLoad.imageView.getContext(); a.runOnUiThread(bd); } } if(Thread.interrupted()) break; } } catch (InterruptedException e) { } } } PhotosLoader photoLoaderThread=new PhotosLoader(); class BitmapDisplayer implements Runnable { Bitmap bitmap; ImageView imageView; public BitmapDisplayer(Bitmap b, ImageView i){bitmap=b;imageView=i;} public void run() { if(bitmap!=null) imageView.setImageBitmap(bitmap); else imageView.setImageResource(stub_id); } } public void clearCache() { memoryCache.clear(); fileCache.clear(); } }
WATCH MEETS.