android - can not render online resources or simple text in canvas -


i have view want display resources online. create subclass of android.view.view , override dispatchdraw method:

public class tview extends view {     asynchttpclient client = new asynchttpclient();     private paint p = new paint();      public tview(context context) {         super(context);     }      @override     protected void dispatchdraw(final canvas canvas) {         client.get("http://developer.android.com/assets/images/dac_logo.png", new binaryhttpresponsehandler() {             @override             public void onsuccess(byte[] arg0) {                 dorender(canvas, arg0);             }         });         super.dispatchdraw(canvas);     }      private void dorender(canvas c, byte[] data) {         log.d("xx", "data length :" + data.length);         c.drawtext("hello", 10, 10 + p.gettextsize(), p);         bitmap bmp = bitmapfactory.decodebytearray(data, 0, data.length);         bitmapdrawable bd = new bitmapdrawable(bmp);         bd.draw(c);     } }

however following codes not work.

i got log message :

04-18 19:10:44.933: d/xx(1258): data length :2170

it seems data downloaded. canvas not render it.

what problem?

btw,i use asychttpclient simplify data request.

i asker of post. , find said solution. ( not if best works).

it seems caused asynchronous thread when tried request data asynchttpclient. , once requesting thread start, ui thread complete , returned back, , canvas have got out of scope.

then when data returned back, canvas not work more.

btw, still hope convinced answer.


Comments

Post a Comment

Popular posts from this blog

Why does Ruby on Rails generate add a blank line to the end of a file? -

running rails generate controller foo home results in: class foocontroller < application controller def home end end (there's nothing on line in actual file, blank line) is there purpose blank line? it's common use newline indicate end of line, last line. many editors (like vi, use) add in newline silently. consensus text files (especially in unix world) should end in newline, , there have been problems historically if wasn't present. why should text files end newline? the tool used count lines in file "wc" counts newlines in file, without trailing newline show 3 instead of 4. it improves readability of templates used in generator. consider: https://github.com/rails/rails/blob/master/railties/lib/rails/generators/rails/controller/templates/controller.rb to remove trailing newline, template have last line of: end<% end -%> instead of: end <% end -%> that seems less readable me. the discussion below refers
Read more

keyboard - Smiles and long press feature in Android -

i've created android keyboard. how add features inserting smilies, , using long keypresses display symbols? to create long-press behavior allows select several options pop-up menu, follow guide (specifically pop-up menu section): http://developer.android.com/guide/topics/ui/menus.html smileys (also known emoticons) combination of keys, understood programs , parsed same way. have do, when clicks smiley face on keyboard, simulate pressing of key combination matching emoticon. example, when clicks smiley, should simulate key presses ':' , ')' :). here's list of emoticons: http://en.wikipedia.org/wiki/list_of_emoticons
Read more

node.js - Bad Request - node js ajax post -

i'm using express 3.0 , node v0.11.0. have button submits form , i'm using ajax post data json object node server. client code is: $('#contact').submit(function(e) { console.log('submit called'); var formdata = json.stringify($('form').serializeobject()); console.log(formdata); $.ajax({ url: "http://localhost:3000/savedata/", type: "post", datatype: 'json', data: {objectdata: formdata}, contenttype: "application/json", complete: function() { console.log('process complete'); }, success: function(data) { console.log('process sucess'); }, error: function() { console.log('process error'); }, }); return false; }); then on server: var express = require('express'); var app = express(); app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.bodyparser());
Read more