java - Load multiple bitmaps in Android Studio one at time with threads -


i'm working on project takes pictures camera , saves photopath in database, working fine , i'm handling memory correctly generating thumbnails when load images.

the thing want i'm trying dedicate threads go loading images 1 per 1 in layout, because example, if have 50, normal load shows layout until 50 loaded, meanwhile doesn't show anything.

i've tried implement threads load one, , one, it's same, until loads all, shows all, here code:

    string query = "select id_reg_mem, information memory_reg type = 'photo' , id_memory =" + id_memory;         final cursor resultado = memorydb.rawquery(query, null);  if(resultado.movetofirst())             nophotos = resultado.getcount();  for(int i=0; i<nophotos; i++)         {             new thread()             {                 public void run()                 {                     getactivity().runonuithread(new runnable() {                         @override                         public void run() {                             updatenewphoto(resultado.getstring(1)); // send path db method made add tablerow image (inside imageview)                         }                     });                 }             }.start();              if(i + 1 == nophotos)                 break;             resultado.movetonext();         }

here method, i'm loading single image imageview inside tablerow. method working load images db.

protected void updatenewphoto(string path)     {         imageview iv;         if(rows == null) {             rows = new arraylist<tablerow>();             rows.add(new tablerow(tl.getcontext()));             iv = new imageview(tl.getcontext());             iv.setlayoutparams(new tablerow.layoutparams(250,250));             iv.settag(db_utils.maxidregmem(memorydb) - 1);             iv.setimagebitmap(getbitmapthumbnail(path));             rows.get(0).addview(iv);             tl.addview(rows.get(0));             count = 2;         }          else         {             iv = new imageview(tl.getcontext());             iv.setlayoutparams(new tablerow.layoutparams(250,250));             iv.settag(db_utils.maxidregmem(memorydb) - 1);             iv.setimagebitmap(getbitmapthumbnail(path));             if(count == 2)             {                 rows.get(rows.size() - 1).addview(iv);                 count = 1;             }              else             {                 rows.add(new tablerow(tl.getcontext()));                 rows.get(rows.size() - 1).addview(iv);                 tl.addview(rows.get(rows.size() - 1));                 count = 2;             }         }

unfortunately me, images aren't shown until of them loaded (kind of 3 seconds takes). i'm thinking in no limit of images, that's why want way images loaded 1 per one, not together.

any ideas have? appreciate help. thanks.


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