Android :: Should I Use Canvas / SurfaceView For A Chess Game?
Oct 10, 2009
I am developing a chess game, what view should I use for the chessboard, Canvas or SurfaceView? I want to implement some animations like moving a piece, fading the chessboard or maybe rotating the chessboard.
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Mar 13, 2010
I'm developing chess game for Android (androidchess.appspot.com). If I want to add animations, should I use custom View extending Canvas (I do this now), or custom View extending SurfaceView?
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Oct 9, 2010
I had a message pop up saying I needed a spyware, malwRe, antivirus program. Any ideas about this? This only happened after I downloaded a chess game off the market
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Jun 24, 2010
So I was planning on writing a Chess-based mini game as part of a project. I was working on my pitch when I realized that I had to represent 64 clickable squares on a screen of that size. I found a couple of ways around it. Like letting them choose a row number from 1-8 and a column number from A-H OR providing them with four arrow keys to navigate across the screen. But it just takes the fun and intensity out of the game.
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Sep 13, 2010
Is there a free simple chess game to install on the htc desire please?
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Sep 9, 2010
I am using SurfaceView to draw my game on the screen of the phone. Basically now I want to be able to draw Android Views on my View, such as a Button or ListView. I am simlpy getting a Canvas and then I draw on that... does anybody know how to draw AndroidViews (Button, ListView.) on my Canvas?
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Aug 20, 2010
When I set the background to my surfaceview, I see what I set as the background. However, I cannot draw simple things like circles when I lock/unlock the surfaceview's canvas. All I see is the background image.
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Sep 2, 2010
Is there a way to animate drawables on a canvas using the android built-in animation classes?
Ive been modeling my test application, a game, after the example apps lunarlander and jetboy. They contain a lot of reusable code, but they manually update the drawable objects in real time. It seems like using the android animation built ins would be so much easier since they provide the type of animation I need¦a simple linear movement.
Is there a way to do this, or am I better off updating my canvas in real time much like the example apps.
If there is a way, could anyone get me started with some sample code? I am currently inheriting SurfaceView in my class.
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Apr 18, 2010
I'm developping a simple realtime action game 4 Android. It works nice. but now i want deal with animation FPS and i'm facing a big problem i can't solve since couple days now.
I started from the famous Lunar Android sample using facebook. got 55-60 frame per second on my G1. it smelt good for my game i thought ... BUT when i plugged the surface view in my game i got a poor 6-9 Frame per second making the game unplayable.
After debugging removing all content of my doDraw used by the thread controlling the surface view i found the problem.
The problem is not the quantity of sprites i displayed but the concurrency between threads used for receiving my game data over TCP and the UI thread i use to control surface view.
If when i start displaying the game i stop the my socket protocol threads (reader, writer) the game is refreshed at 25 FPS which is not 50 FPS but large enought to make the game playable.
So my question is how in realtime game for android i can send / received data (and not delayed of course) without killing the game refresh rate.
Last thing i use canvas and not open gl but i don't need open gl and i really see the problem comes from the multithreading.
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Aug 30, 2010
I am building a 2D game with Android SurfaceView. When I touch the screen the game animation runs slowly. Why, and how can I avoid this?
The touch events are stubs just like onTouchEvents(MotionEvents ev){ empty };. All of the game logic and graphics draw code are in run() in an extends Thread class.
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Jun 18, 2009
My game runs fairly well on my phone, but i want to increase the performance by using opengl. However currently i use the Canvas. I am a beginner in opengl. I have to port all my drawing code to opengl. However can somebody give me directions. For example how do i do the following in opengl:
c.save();c.scale(0.3f+scale, 0.3f+scale, width/2, height/2) c.drawBitmap( bMsg.bitmap, width/2 - bMsg.bitmap.getWidth()/2,dy+height/2 - bMsg.bitmap.getHeight()/2, MESSAGE_PAINT);c.restore();
And why cant i just use Canvas as an abstraction layer (facade) for opengl. An implementation of canvas could call the correct opengl methods in order to render. Why do i have to port all my code. I thought the canvas was a good abstraction interface to a drawing surface, why do i have to bother with opengl? It looks like this is possible, when is see the following contructor: "public Canvas (GL gl)" Also the this seems usefull. SURFACE_TYPE_GPU Surface type: creates a surface suited to be used with the GPU So what should i do? Re implementing the GamePainter completely and call opengl functions directly? Or is there some kind of abstraction mechanism, so that i can use OpenGL with just a few lines of code?
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Aug 20, 2010
One using a Surfaceview, and the other using a custom view. According to the android SDK development guide, using a surface view is better because you can spawn a separate thread to handle graphics. Th SDK development guide claims that using a custom view with invalidate calls is only good for slower animations, less intense graphics.However, in my simple app, I can clearly see that using a custom view with calls to invalidate seems to render faster.What do you guys know/think about this?My touchEvent code is exactly the same, and my drawing code is exactly the same. The only difference is that one is all in the UI thread, and the other is using a tread to handle the drawing.
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Jul 22, 2010
I based my game off of the lunar lander demo, although heavily modified, and I can get around 40-50fps but the problem is it fluctuates between 40-50fps so much that it causes the moving graphics to jitter! Its very annoying and makes my game look really shitty when in fact its running at a good frame rate.
I tried setting the thread priority higher but that just made it worse... now it will fluctuate between 40-60fps...
I was thinking of limiting the FPS to about 30 so that it will be constant. Is this a good idea and does anyone else have experience or a different solution?
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Jul 22, 2010
I based my game off of the lunar lander demo, although heavily modified, and I can get around 40-50fps but the problem is it fluctuates between 40-50fps so much that it causes the moving graphics to jitter! Its very annoying and makes my game look really shitty when in fact its running at a good frame rate.
I tried setting the thread priority higher but that just made it worse... now it will fluctuate between 40-60fps...
I was thinking of limiting the FPS to about 30 so that it will be constant. Is this a good idea and does anyone else have experience or a different solution?
This is my run loop
CODE:................
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Jul 7, 2010
My loadMap() method generate a canvas.throwIfRecycled exception when i try to load a new map.
When i start the game, the initial map loads and work fine though,
its only when i try to load a new map that i get the exception ..
How can i "reset" canvas and the bitmap i use to draw into, so i can startover fresh with them ?
here's what i use to create and draw my maps:
CODE:.........
So basicaly once i created and used picDest and canvas, i cannot figure how to reset it all for when i want to load a new map..
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Nov 2, 2009
I created a chess game for Android - Chess Walk, it's on Market for free under title "Chess Walk (BETA)". It has online mode (you can play on Free Internet Chess Server) and offline mode. The built-in chess engine is not very good, I'll probably focus now on improving its strength and style of play.
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May 22, 2010
I have a square grid, for a turn based game ( grid is similar to the chess board ), but the moves in the games are different based on whether you have lapped your opponent pawn at least once or not.i.e if you have not lapped (beaten any of the opponents pawns) in the outer most grid as below.if you have lapped your opponent pawn once at least, then you get to reach home,this way.Any player having all his pawns reaching "home" first wins.The ones in yellow are safe-houses, i.e both the opponent pawn and the player's pawn get to stay in the same grid, this is not considered to be lapping ( the opponent ).The lapped pawn will return to its start point.Now the question is, what is the effective way to store the paths for the all the pawns.we will have 4 pawns for the player and 4 opponent pawns.Is there any pattern to store such static information, in a elegant way?
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Nov 12, 2010
I have a puzzle game with a 7x7 grid of graphics, and a timer, its just about ready to go. But I am stuck on how to go about saving/continuing game. For example when someone exits I want them to be able to save and exit, then come back and click continue to pick up where they left off with all of the graphics in the right place, timer and score. I looked at onSaveInstanceState android examples, but not sure if this is what I need or how to implement it in my case.
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Mar 25, 2009
Im creating a simple game using a SurfaceView for drawing the Graphics. It works fine, but now I tried to add a title screen, which is (for now) only a LinearLayout and a Start-button, specified in XML. However, when I click this button and try to switch to my SurfaceView (By doing setContentView(R.layout.game), the screen turns black. But if I do setContentView(R.layout.game) immediatly in my Activity.onCreate it works. But not if I start with my Title-screen and then try to switch
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Apr 30, 2009
I am finally testing my application on a G1 and even though it works fine on the emulator, it crashes on the G1
It crashes when it does:
CODE:.........
And the view is defined like this:
CODE:..............
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Jun 16, 2009
I want to play 2 videos one after one minimizing delay between each video. so I created 2 mediaplayer, one playing the current video and the other preparing to play the following video.
The 1st video is played correctely but I couldn't get the video track of the second video. only sound without any error.
This is my source code : (note that here, I am using files on sdcard but the application will use files on a web server. that's why I need to prepare the second video while the 1st is playing)
CODE:...................................
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Sep 4, 2010
My app fc when activity that's using SurfaceView as content view calls startActivityForResult(...) and activity that has been started calls finish()
This does not happen if I change content view to something else than SurfaceView.
This would be the requested logcat:
CODE:..................
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Dec 16, 2009
Look at this: http://nhenze.net/?p=172
They show that it is possible to put an GLSurfaceview on top on a SurfaceView. I hope it would be useful.
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May 18, 2010
When exiting the activity in a thread in a SurfaceView. This log appears in this situation:.............
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Sep 11, 2010
For years now I've maintained a Tandy Color Computer Emulator applet on my home page. With the purchase of an Incredible I decided to do a port. Getting it going in Android didn't take long but I'm really surprised how slow it runs. You can literally see the pixels painting. I know there are other successful Android emulators so I must be doing something wrong.
My approach was to use a SurfaceView for rendering. There's a separate thread that runs a virtual 6809 CPU. Whenever that thread updates the emulated video memory, it calls SurfaceHolder.lockCanvas() with a Rect describing the part of the screen requiring a repaint. Then it calls the gfx routines with the resulting Canvas...this is where I did a repaint() in AWT/Swing. The gfx routines are smart enough to just render what's in the clipRect. Perhaps I'm still stuck in AWT but I can't think of any way to make this thing run at an acceptable speed. I tried to coalesce the gfx calls but that didn't work either. Any thoughts?
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Feb 11, 2009
I have a SurfaceView that is covering a portion of its parent, a RelativeLayout. I have a background image covering the full RelativeLayout area, and this is my Activity's main layout.
I would like to have the SurfaceView be transparent so that I can see through to the background image on its parent RelativeLayout. I have tried the approach shown in the API Demos example TranslucentGLSurfaceViewActivity, but this succeeds in making the transparency go all the way through my Activity to my desktop!
I'm using the "style/Theme.Translucent" theme on my activity, and setting this on my SurfaceView: mySurfaceView.getHolder().setFormat(PixelFormat.RGBA_8888);
The transparency to the desktop it kinda cool, but not what I'm trying to do! Is it possible to make a SurfaceView transparent only through to its parent?
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Apr 24, 2009
I am stuck.My main activity creates and starts a SurfaceView.My app needs to access a listview via the options menu to change properties of the items shown in the view.Two strange things occur:
1.) When I scroll the listview quickly, the list sometimes gets farklempt.Words overlap each other.
2.) When I select the item and the app returns to the main activity, the thread is no longer alive.
If someone out there can offer help I will post the code.This will take a little effort.My code is loosely based upon LunarLander and the GLSurfaceView examples.If there is a good example (more recent example) someone can point me to, that would be boss.
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Mar 23, 2009
I'm currently getting to grips with Android, playing around with the Lunar Lander sample. I've found that if you navigate away from the app (eg, hit the call button) it will destroy the underlying surface (calling surfaceDestroyed). Navigating back (which will trigger onWindowVisibilityChanged) the app will crash, as it will try to draw to the surface without recreating it. Is there some code I can put in onWindowVisibilityChanged (or anywhere else) that will regenerate the SurfaceView's underlying surface and resume execution nicely? It feels like this should be a simple function call but I can't find anything in the API docs.
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Jun 10, 2009
I am creating a custom Widget which extends SurfaceView and I am planning to use it for camera preview.In the main activity I tried to implement some event listeners but can't catch any event.If I press a button the LogCat outputs "Continuing to wait for key to be dispatched" line.Does anyone know how to implement event listeners in main activity using SurfaceView classes?
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May 31, 2009
I had it working with a normal View but that is to slow. I was told to use SurfaceView but can't figure out how to use OnKey with it and if I should use onDraw or draw? And how do I pass stuff to draw? does it happen automatically? code...
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