android - Replacing call to setImageResource() with setImageBitmap to reduce hiccup? -

android's setimageresource() documentation states:

this bitmap reading , decoding on ui thread, can cause latency hiccup. if that's concern, consider using setimagedrawable(android.graphics.drawable.drawable) or setimagebitmap(android.graphics.bitmap) , bitmapfactory instead.

i'm looking solve exact issue in example application. think i'm supposed "read between lines" here , and replace call :

((imageview) rootview.findviewbyid(r.id.screen_image)).setimageresource(imageid); 

to instead call

inputstream = this.getresources().openrawresource(imageid); bitmap imagebitmap = bitmapfactory.decodestream(is); ((imageview) rootview.findviewbyid(r.id.screen_image)).setimagebitmap(imagebitmap); 

but within thread, using asynctask -

am correct in understanding, or there simpler solution?

update:

it looks there entire section on displaying bitmaps efficiently on developer.android.com - i'm investigating now.

the simplest way solve issue create worker thread described in thread & process documentation. mentions, async task can used replace more complex code. final solution change code in oncreateview() method, replacing original laggy code:

 final view rootview = inflater.inflate(r.layout.fragment_screen, container, false);  int = getarguments().getint(arg_panel_number);  string panel = getresources().getstringarray(r.array.panel_array)[i];  int imageid = getresources().getidentifier(panel.tolowercase(locale.getdefault()),                 "drawable", getactivity().getpackagename());   ((imageview) rootview.findviewbyid(r.id.screen_image)).setimagedrawable(getresources().getdrawable(imageid)); 

with new background thread:

final view rootview = inflater.inflate(r.layout.fragment_screen, container, false);  // load image in separate thread ensure navigation drawer animation smooth. // replace async task if necessary     new thread(new runnable() {         public void run() {             int = getarguments().getint(arg_panel_number);             final string panel = getresources().getstringarray(r.array.panel_array)[i];              int imageid = getresources().getidentifier(panel.tolowercase(locale.getdefault()),                     "drawable", getactivity().getpackagename());              inputstream = getactivity().getresources().openrawresource(imageid);             final bitmap imagebitmap = bitmapfactory.decodestream(is);             rootview.post( new runnable() {                 public void run() {                     ((imageview) rootview.findviewbyid(r.id.screen_image)).setimagebitmap(imagebitmap);                     getactivity().settitle(panel);                 }             });         }      }).start(); 

as described in documentation above, using async task more extensible , maintainable if code grows large.