android - UnsupportedException from Canvas.setBitmap(Bitmap) -


i'm creating app drawings , such under users control , let's them save it. way i'm trying achieve using custom bitmap on canvas draws saving resulting bitmap.

everything working expected, until canvas.setbitmap(bitmap) called.

i following error.

03-24 13:47:50.741: e/androidruntime(27888): fatal exception: main 03-24 13:47:50.741: e/androidruntime(27888): process: example.imageeditor, pid: 27888 03-24 13:47:50.741: e/androidruntime(27888): java.lang.unsupportedoperationexception 03-24 13:47:50.741: e/androidruntime(27888):    @ android.view.hardwarecanvas.setbitmap(hardwarecanvas.java:39)

code throwing exception:

protected void ondraw(canvas canvas) {     mresultimage=bitmap.createbitmap(width,height,moriginalimage.getconfig());     canvas.setbitmap(mresultimage);     canvas.save();      if(moriginalimage!=null)         canvas.drawbitmap(moriginalimage, width, height, paint);     else         canvas.drawtext("image loading...", width/2f-20, height/2, paint);      canvas.drawtext(text, x, y-20, paint);      canvas.restore();     super.ondraw(canvas); }

the android.view.hardwarecanvas isn't on reference of android. able find information it. seems it's setbitmap(bitmap) isn't written yet, , that's ok.

my question why ondraw(canvas) returning hardwarecanvas class? isn't super class canvas.

bonus question: way around this?

if want draw on bitmap should create new canvas passing bitmap it. should not allowed change target of canvas view should drawn on. create new canvas bitmap , draw resulting bitmap on canvas in ondraw method.


Comments

Post a Comment

Popular posts from this blog

android - Get AccessToken using signpost OAuth without opening a browser (Two legged Oauth) -

i using signpost oauth access data magento server. have read various tutorials on same , reach point open browser user can enter credentials. however, per requirement have automate part. hence, user should not browser page. have set-up done on server side ( magento ), hit url , returned call page. same through program in android. i have tried below, consumer = new commonshttpoauthconsumer(key, secret); provider = new commonshttpoauthprovider(oauth_init_url,access_token_url, authorize_url); try { provider.retrieverequesttoken(consumer, oauth.out_of_band); log.d("tokens" , consumer.gettoken() + " -- " + consumer.gettokensecret()); } and request tokens. dont know how bypass next step. tried directly accessing accesstoken (stupid of me) provider.retrieveaccesstoken(consumer, "mycallback://callback"); no luck, ends in oauth.signpost.exception.oauthnotauthorizedexception: authorization failed (server replied 401). ...
Read more

org.mockito.exceptions.misusing.InvalidUseOfMatchersException: mockito -

getting error org.mockito.exceptions.misusing.invaliduseofmatchersexception: invalid use of argument matchers! 1 matchers expected, 2 recorded. exception may occur if matchers combined raw values: //incorrect: somemethod(anyobject(), "raw string"); when using matchers, arguments have provided matchers. example: //correct: somemethod(anyobject(), eq("string matcher")); at when( getprogramservice .callservice(any(getprogramtype.class))) .thenreturn(jaxbresponse); please explain error , possible resolution the code posted looks fine; don't see problem it. code before or above causing exception. key here: invalid use of argument matchers! 1 matchers expected, 2 recorded. any , used above, doesn't return "special kind of null" or "special kind of getprogramtype"; don't exist. instead, returns null , side effect puts matcher on stack. whe...
Read more

google shop client API returns 400 bad request error while adding an item -

i'm working on solution add items in google shopping market java application. following tutorial real mess because of missing classes of laste release, after setting 1.5-beta maven managed make base example typecheck correctly classes. still can make simple task of adding 1 item. instead of posting whole code i'm posting part creates product feed. private product createproduct(string id) { product product = new product(); product.title = "red wool sweater"; product.content = new content( "text", "comfortable , soft, sweater keep warm on " + "cold winter nights. red , blue stripes."); product.appcontrol = new appcontrol(); product.appcontrol.addrequireddestination("productads"); product.externalid = id; product.lang = "it"; product.country = "it"; product.condition = "nuovo"; product.price = new price("eu...
Read more