UserTask class is useful but in this case, if i want to fix my problem in my code, can you help me to do that? I really appreciate your help ! Thanks, NPAK
On Wed, Mar 4, 2009 at 2:15 PM, Clay <claytan...@gmail.com> wrote: > > so just from the basic use case I dont know that I would use a > handler, basically I really like Romain Guy's implementation for > background user tasks that do things and then update the screen, its > based on his userTask implementation: > > > http://code.google.com/p/apps-for-android/source/browse/trunk/Photostream/src/com/google/android/photostream/UserTask.java > > so to extend this, it uses generics *very wisely* so you can make any > model you want for both the doInBackground params which returns the > third arg, and becomes the param for onPostExecute. > > /** > * Background task to verify the create user action. When the > action comes back > * it could inform the client to sync all data if the username and > password match > * or that there was a validation error like the user already > exists, or that > * this is a new user and that it successfully created it. > * > */ > private class PostActionTask extends UserTask<Object, Void, > ActionResult> { > public ActionResult doInBackground(Object... params) { > ActionResult result = > new ActionResult(); > result.setActionStatus("FAILED"); > > Action actionToRun = (Action)params[0]; > > try { > result = > RpcActionClient.executeAction( > actionToRun, > > MomentaryNowApp.getString("app_momentary_now_server"), > > MomentaryNowApp.getInteger("app_momentary_now_server_port"), > > MomentaryNowApp.getString("app_momentary_action_endpoint")) ; > > } catch (IOException e) { > Log.e(TAG, "IOException:"+e.getMessage()); > } catch (HttpException e) { > Log.e(TAG, "HttpException:"+e.getMessage()); > } catch (URISyntaxException e) { > Log.e(TAG, "URISyntaxException:"+e.getMessage()); > } > return result; > } > > @Override > public void onPostExecute(ActionResult result) { > Log.d(TAG, "result:"+result.getActionStatus()); > if(result.getActionStatus().equals("SUCCESS")) > { > //get the progress bar to update > ProgressBar progressBar = > > (ProgressBar)findViewById(R.id.create_keyword_send_progress); > progressBar.setVisibility(View.GONE); > > ImageView checked = > > (ImageView)findViewById(R.id.create_keyword_send_toggle); > checked.setVisibility(View.VISIBLE); > > } > } > } > > secondly it is my understanding that AlarmManager is the timer > infrastructure you would most likely use > and that it would then call your background task. > > > http://developer.android.com/guide/samples/ApiDemos/src/com/example/android/apis/app/AlarmController.html > > I am sure there are other ways to do this but this would be the way I > would try if I was doing what you told me. > > Clay > > > > On Mar 2, 11:32 pm, "npak...@gmail.com" <npak...@gmail.com> wrote: > > Hi all, > > My purpose is very simple : each 1second, I want to redraw an object > > on different place on background. > > I do not know where my error on this code below. Hope that you can > > show me or give me an advice to fix this problem > > > > Here is my code > > > ********************************************************************************************************************** > > public class My_View extends View{ > > > > private Bitmap mBackground_img; > > private Drawable mMoveObject; > > private int mObjectw,mObjecth; > > private int Dx,Dy; > > > > private Handler myHandler = new Handler(); > > private long lasttime; > > public My_View(Context context,AttributeSet ats,int ds) > > { > > super(context,ats,ds); > > init(context); > > } > > public My_View(Context context,AttributeSet ats) > > { > > super(context,ats); > > init(context); > > } > > public My_View(Context context) > > { > > super(context); > > init(context); > > } > > > > public void change() > > { > > invalidate(); > > } > > private void init(Context context) > > { > > Resources res = context.getResources(); > > mMoveObject = res.getDrawable > > (R.drawable.lander_firing); > > mBackground_img = BitmapFactory.decodeResource(res, > > R.drawable.my_pic); > > mObjectw = mMoveObject.getIntrinsicWidth(); > > mObjecth = mMoveObject.getIntrinsicHeight(); > > Dx = Dy = 0; > > > > lasttime = System.currentTimeMillis() + 1000; > > Thread mthread = new Thread(null,doBackground,"Background"); > > mthread.start(); > > } > > private Runnable doBackground = new Runnable() > > { > > public void run() > > { > > long now = System.currentTimeMillis(); > > if(lasttime < now ) > > { > > Dx = Dx + 10; > > Dy = Dy + 10; > > lasttime = now + 1000; > > myHandler.post(change_view); > > } > > } > > }; > > private Runnable change_view = new Runnable() > > { > > public void run() > > { > > change(); > > } > > }; > > @Override > > public void onDraw(Canvas canvas) > > { > > canvas.drawBitmap(mBackground_img,0 ,0 , null); > > mMoveObject.setBounds(Dx, Dy, Dx+mObjectw, Dy+mObjecth); > > mMoveObject.draw(canvas); > > }} > > > > > ********************************************************************************************************************** > > Hope to see your reply soon, > > Thanks in advance, > > NPAK > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. 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