view - Save ViewGroup state : Android -

note: here not talking saving state of activity through onsaveinstancestate(...)

i using https://github.com/eskim/android_drag_sample code drag , drop views in application. user can create multiple scenes in application , each scene, user can add multiple views , drag , drop them wherever want. while switching scenes storing scene information number of children's added, properties etc in model object , working fine. user can save scenes , send through mail pdf. problem prepare pdf need images(am using itext library convert images pdf) how can convert other hidden scenes(which not visible) image? visible scene can convert image , store in sd card. tried saving current scene in model object , converting image while preparing pdf overwriting scenes current scene. dont know whether approach correct or not. so, or clue appreciated.

code convert view bitmap :

public static bitmap getbitmapfromview(final view view) {     if(view.getwidth() <= 0 && view.getheight() <= 0)         return null;      bitmap returnedbitmap = bitmap.createbitmap(view.getwidth(), view.getheight(), bitmap.config.argb_8888);     final canvas canvas = new canvas(returnedbitmap);      drawable bgdrawable = view.getbackground();     if (bgdrawable != null)          bgdrawable.draw(canvas);     else          canvas.drawcolor(color.white);      ((activity) view.getcontext()).runonuithread(new runnable() {          @override         public void run() {             view.draw(canvas);         }     });      return returnedbitmap; } 

after quite long time, got solution problem. idea whatever data there in model object, adding layout , getting image that. below code.

/** convert mystscene(model object) view */ public static view getview(context context, mystscene mystscene) {     relativelayout sceneview = new relativelayout(context);     relativelayout.layoutparams parms = new relativelayout.layoutparams(constants.play_area_width_tag,              layoutparams.wrap_content);     parms.setmargins(100, 100, 100, 100);      string scenebackground = mystscene.getthemeimagename();     drawable drawable = bitmapconverter.getdrawable(context, scenebackground);      sceneview.setbackgrounddrawable(drawable);      for(mystcharacter mystcharacter : mystscene.getcharacterlist()) {         int scale = mystcharacter.getscale();         imageview image = new imageview(context);         string filepath = mystcharacter.getcharactername();         int xposition = (int) mystcharacter.getcharacterpoint().x + 141;         if(xposition >= constants.play_area_width_tag)             xposition -= 400;         else if(xposition > (constants.play_area_width_tag / 2))             xposition -= 300;         else             xposition -= 200;         int yposition = (int) mystcharacter.getcharacterpoint().y;         if(!mystcharacter.getisdialog())             sceneview.addview(setimageproperties(image, scale, filepath,                      xposition, yposition, 0, 0));         else {             adddialog(mystcharacter, sceneview, filepath,                      xposition, yposition);         }     }      // add writing pad if text added while creating/saving scene     boolean istrue = mystscene.getstorytext() != null && mystscene.getstorytext().length() != 0;     if(istrue)          addwritingpad(mystscene, sceneview);      sceneview.setlayoutparams(parms);      return sceneview; } 

save view sd card image

public static void saveviewtosd(getview(context, mystscene)) {      file fullsavedir = fileutils.createdirectory(fileutils.pdf_images_directory_tag);      file file = new file(fullsavedir, ""+system.currenttimemillis()+".png");      bitmap bitmap = null;      try {         if(file != null && !file.exists())             file.createnewfile();          fileoutputstream fileoutputstream = new fileoutputstream(file);          bitmap = loadbitmapfromview(view);           if(bitmap == null) {             fileoutputstream.close();             return;         }          bitmap.compress(bitmap.compressformat.png, 90, fileoutputstream);         fileoutputstream.flush();         fileoutputstream.close();     } catch (filenotfoundexception e) {         e.printstacktrace();     } catch (ioexception e) {         e.printstacktrace();     } {         if(bitmap != null && !bitmap.isrecycled()) {              bitmap.recycle();             bitmap = null;         }     } } 

load bitmap view

public static bitmap loadbitmapfromview(view view) throws illegalargumentexception {      if (view.getmeasuredheight() <= 0)          view.measure(layoutparams.wrap_content, layoutparams.wrap_content);      bitmap bitmap = bitmap.createbitmap( constants.play_area_width_tag, constants.play_area_height_tag,              bitmap.config.argb_8888);       canvas canvas = new canvas(bitmap);      drawable bgdrawable = view.getbackground();      bitmap bitmapbg = ((bitmapdrawable)bgdrawable).getbitmap();     canvas.drawbitmap(bitmapbg, view.getleft(), view.gettop(), null);      view.layout(view.getleft(), view.gettop(), view.getright(), view.getbottom());     view.draw(canvas);      return bitmap; }