android - Image Getter in Fragments -
i trying codes found here using imagegetter display image source html code. encountered problem when app trying image said html code. first time working fragments.
this class working on extends fragment. dont know how cast object result drawable object inside fragment.
and enlighten me fragments, why codes work on normal activity , when extend fragment need add getactivity or getview.
it error points out @ line: attempt invoke virtual object on null reference.
urldrawable.setbounds(0, 0, 0 + result.getintrinsicwidth(), 0 + result.getintrinsicheight()); logcat points error on code above result.getintrinsicwidth().
@override protected void onpostexecute(drawable result) { // set correct bound according result http call urldrawable.setbounds(0, 0, 0 + result.getintrinsicwidth(), 0 + result.getintrinsicheight()); // change reference of current drawable result // http call urldrawable.drawable = result; // redraw image invalidating container urlimageparser.this.container.invalidate(); } do in background:
@override protected drawable doinbackground(string... params) { string source = params[0]; return fetchdrawable(source); } whole class image getter:
public class imagegetterasynctask extends asynctask<string, void, drawable> { urldrawable urldrawable; public imagegetterasynctask(urldrawable d) { this.urldrawable = d; } @override protected drawable doinbackground(string... params) { string source = params[0]; return fetchdrawable(source); } @override protected void onpostexecute(drawable result) { // set correct bound according result http call urldrawable.setbounds(0, 0, 0 + result.getintrinsicwidth(), 0 + result.getintrinsicheight()); // change reference of current drawable result // http call urldrawable.drawable = result; // redraw image invalidating container urlimageparser.this.container.invalidate(); } /*** * drawable url * @param urlstring * @return */ public drawable fetchdrawable(string urlstring) { try { inputstream = fetch(urlstring); drawable drawable = drawable.createfromstream(is, "src"); drawable.setbounds(0, 0, 0 + drawable.getintrinsicwidth(), 0 + drawable.getintrinsicheight()); return drawable; } catch (exception e) { return null; } } private inputstream fetch(string urlstring) throws malformedurlexception, ioexception { defaulthttpclient httpclient = new defaulthttpclient(); httpget request = new httpget(urlstring); httpresponse response = httpclient.execute(request); return response.getentity().getcontent(); } }
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