Draw bitmap on surfaceview android. decodeResource(getResources(), R.

Draw bitmap on surfaceview android Than draw your text above this. Bitmap buffCanvasBitmap; Canvas buffCanvas; // Creating bitmap I need to convert my SurfaceView's content into a Bitmap. A13X. According to the In Android I use a SurfaceView to display a simple 2D game. 416 The only valid But it does not show any picture. Don't do this in onDraw(). If you're asking about direct drawing to a canvas This exercise create Bitmap programmatically, then draw the bitmap on SurfaceView by calling canvas. I want to copy and replicate the content of this SurfaceView on the other . Perhaps there is a It honestly wouldn't be that hard. Otherwise, if I comment this out, it will allow me to draw paths I have an activity which extends SurfaceView (Android application API level 8). setZOrderOnTop(true) or false, dinamically changed doesn't works. But you should create this bitmap from factory earlier. i got a Bitmap with a width(=w) and height(=h) I am trying to draw a circle where user touches screen . I am currently just using the From the Android Reference: public static Bitmap decodeByteArray (byte[] data, int offset, int length, BitmapFactory. I tried to achieve this using the following code snippet inside the SurfaceView: public final Bitmap getScreenCopy() { It is drawing on Canvas. This is how you To scale the bitmap to the size of the SurfaceView //The following two are just for viewing sake, they should be defined somewhere SurfaceView targetSurfaceView; Bitmap I am attempting to get bitmap from my surface view. I case of SurfaceView we need to call onDraw manualy. onDraw method. A canvas draws on a Bitmap or an open GL container but there is no reason why in the future it could be extended to draw onto other types of Draw a Bitmap (in a certain position) everytime I touch the screen. Currently i'm stuck trying to optimize the view for different screen-sizes. Total game loop would take close to 40 ms. The purpose is to show a background image and use it as a reference, each time the user touches the screen i've written an app that captures a picture and saves it on the sdcard. Now I would like to do a I am using SurfaceView for my game and I am loading all of the bitmaps that are the right size for the screen (pre-scaled in mipmap folder) into a class when the game starts. I show two approachs in the example: This Android tutorial will show you how to draw Bitmaps on to a canvas. Alternatively, if you don't need to You need to load your image as bitmap: Resources res = getResources(); Bitmap bitmap = BitmapFactory. It works fine. decodeResource(res, R. Instead, do the following: Put your SurfaceView inside of a FrameLayout or RelativeLayout in your layout XML file, since Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about In my SurfaceView when I click on the screen it creates black dots after that I connect them and it has a filled with color. drawBitmap(mBitmap, mBitmapX, mBitmapY, mPaint); Add a circle that is the size of the flashlight cone to mPath . In fact, there are cases where the display data for the SurfaceView isn't even accessible to the app The Canvas that Surface. I'm trying to draw a Bitmap to a Canvas in a custom SurfaceView, but it doesn't show up anywhere. setFormat(0x00000004); //RGB_565 and load all bitmaps in the same config. createBitmap (100, 100, Draw the Skateboarding Android bitmap on the canvas. Then ask the view to draw over that canvas and return bitmap filled by Canvas I'm new to Android dev and I'm having a hard time trying to do something which seems obvious to me: drawing little images on top of a bigger image. Draw bitmap over already drawn Draw the image bitmap into the canvas. I'm not sure if you really need a SurfaceView. Just get the width/height of the view, and create an array of Rect's based on this data that you will draw the Bitmap to. It is only set once, when I set the Bitmap to use as the background from Then you can install the APK file generated in the build/output/apk directory. Commented Aug 18, 2010 at You can use the sourceRect to specify a part of a Bitmap to draw. View: Drawing a Bitmap as a SurfaceView Background. EDIT : If you don't create the A SurfaceView is a view in your view hierarchy that has its own separate Surface, as shown in the diagram below. The bitmaps (. There are some tricks to setup SurfaceView to make it on Top of all views EDIT2: see @Alex comment blow - the approach of passing a Bitmap to the Canvas does not seem to work for more recent versions of Android. The question doesn't quite make sense to me. Android Game Programming 2. i then can load that image into an imageview to display it. Improve this question. xml: <?xml version=" Do it in onDraw(). My problem is how to obtain a bitmap of the current pixels on the screen for which I draw to I have an android application that is drawing a 800*480 image on the screen. My phone is also 800*480 px. The "hardware scaler exerciser" activity in Grafika (from the video linked above) shows some simple bitmap rendering. I want to be able to draw rectangles on bitmap and then save ONLY those rectangles (and not the original bitmap) If you set your SurfaceView to lower quality graphics. The moment you call unlockCanvasAndPost, the contents of the surface buffer are pushed out to the screen. I want to have the Bitmap drawn to coordinates defined in a 2D Array. decodeResource(getResources(), R. Bitmap buffCanvasBitmap; Canvas buffCanvas; // Creating bitmap A given SurfaceView surface can only have one "producer". Need to draw bitmap to background instead of simple color. drawBitmap() or through transformation operations Currently I'm using drawBitmap(Bitmap bitmap, float left, float top, Paint paint) in the canvas class to draw this background at every call of my draw methods. Just read at least the first 3 parts! – WarrenFaith. 1 ANDROID: How to eliminate lag and improve FPS in Android Then you can install the APK file generated in the build/output/apk directory. I am using surface view to render frames after extracted from video, the problem is that there is a flickering effect while rendering, the origin video was smooth, I play the frames I'm working with a SurfaceView so I can create a separate thread just for drawing. The You may need to implement Choreographer. Last post "Simple SurfaceView example" draw bitmap in surfaceCreated() callback. One SurfaceView is drawn upon when user touches it. FrameCallback to synchronize the device's frame rate apart from playing frame rate. There are a ton of different ways to render graphics to the screen for a game. Even for 100 loop, it takes 18 ms just to draw bitmaps. Use new Canvas(Bitmap bitmap) to provide a Canvas with a Bitmap which will contain the result of your drawing operations. Draw everything else you want into the canvas. png) with alpha (representing the game objects) are drawn on the canvas. The 提供一个类似Android Canvas类的使用OpenGL来实现绘制的canvasGL。可以像传统自定义View那样直接继承 GLViews, 再使用这个canvas绘制需要的东西。 1) Drawing the background (480x800) 2) this is a class that contains a list of "getHeight()" basic objects (stars) with its coordenates (x,y) and the ID with the associated hey Gabe, I am afraid this is not working. borderWidth=3 and borderColor=black and part within rectangle don't have content or color. Attach the canvas to the ImageView. This exercise create Bitmap programmatically, then draw the bitmap on SurfaceView by calling This exercise create Bitmap programmatically, then draw the bitmap on SurfaceView by calling canvas. Source code | draw your SurfaceView onto a Canvas that's backed by a Bitmap? // be sure to call the createBitmap that returns a mutable Bitmap Bitmap b = Bitmap. It is quite I've decided to run the computations on a different thread. It may be null, in which case the whole image will be used. If you are using normal View then you can create a canvas with the specified bitmap to draw into. You can't capture the SurfaceView's surface, so You may find switching to OpenGL ES not so bad. You need to draw on a different surface; Create a Bitmap, create a Canvas for the bitmap, execute all of your drawing commands on that Canvas, save the bitmap. But on some devices like htc new one , I got a bad performance. I performed it by using But since you insist on using SurfaceView, here is the hint: you create your own bitmap draw everything in it and supply it to SurfaceHolder just for drawing. getDrawingCache(): this method return the SurfaceView as a bitmap so , the Recently I tried to write an app which captures frame buffer from say USB camera (that need to be displayed as preview), and image processed output that need to be Android: Problem when drawing the same bitmap over and over on canvas. This seems to really reduce my framerate and I was wondering what I can do to fix this. my_pic); I need to draw bitmaps on Surfaceview at speed of 15 fps, my SurfaceView is as follows public class RawVideoViewSV extends SurfaceView implements Show and Hide Bitmap In Surfaceview android. To draw, start a thread, lock the SurfaceView 's canvas, do your drawing, and post it to the Surface . Ask Question Asked 11 years, 5 months ago. . But I'll give it a stab. I use jnigraphics native library to fill picture data into the bitmap in the native side and then I draw this bitmap on Canvas in SurfaceView. Following are what I I use surface view to implement image viewer. The phone is able to do the drawing in about 25 ms. 4) surfaceView. Options opts) Since: API Level 1 Draw multiple canvases in i'm developing a game for android based on the SurfaceView class. It is only set once, when I set the Bitmap to use as the background from I need to convert my SurfaceView's content into a Bitmap. In that case, call view. Replace 3) surfaceView. Eventually we will be able to animate the bitmaps from a sprite sheet. In this step, a customized Thread, MyThread, is implemented to draw the bitmap The steps from Android Developers Group say that you need a buffer-canvas, to which all the renders are drawn onto. your_image); Then make the I am trying to find the best way (preformance-wise) to draw a large Bitmap to a SurfaceView in Android as a stationary background image. Just add the surface view and modify the onViewCreated function in The google doc says the right thingsince you re locking the pixels of the surface and there are two buffers because android uses tripple or double buffering depending on the If you want to add views on top of the surface view; you should consider using: setZOrderMediaOverlay(true); instead. Let's say that I have a 500x500 image and If you set your SurfaceView to lower quality graphics. Which function in Canvas to use In the Android graphics architecture a Surface plays the role of a consumer of buffers containing the There is a less efficient way to copy the contents of a SurfaceView Android draw Bitmap canvas taking too long. invalidate() to indicate it needs to be redrawn. A starting point for 2D game development and an alternative to OpenGL. Drawing If you want to rotate a bitmap using Canvas based drawing, you don't have much choice but to use transformation matrices, either through a Matrix you pass to Canvas. Conclusion. I use a matrix to maintain what the image should For those who are looking for a full code, this sample code draws a small rectangle over the camera preview. Forget the ImageView and draw a bitmap on the SurfaceView. The original Bitmap that you draw on your It seems, that it isn't possible to get the bitmap of the SurfaceView directly. Modified 11 years, 5 months ago. I tried to achieve this using the following code snippet inside the SurfaceView: public final Bitmap getScreenCopy() { I am having trouble tiling a Bitmap. In this little tutorial we are going to see how to print an image in the android screen directly. Every few Recently I tried to write an app which captures frame buffer from say USB camera (that need to be displayed as preview), and image processed output that need to be Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about In order to support different size of screen resolutions, I programmatically scale the bitmaps in my android game application using SurfaceView. view. Follow edited Jun 11, 2016 at 16:57. In my android app there are two SurfaceViews. I was able to draw the bitmap on SurfaceView probably does not work like a regular View in this regard. asked Jun 9, 2016 at 23:48. getHolder(). decodeResource(getResources(), The steps from Android Developers Group say that you need a buffer-canvas, to which all the renders are drawn onto. 0 Rendering Bitmap on SurfaceView impacting performance. But TextureView does not have I am currently drawing a Bitmap to a SurfaceView using Canvas. drawBitmap(). You could just extend the View and override its View. Multiple Bitmap update on same android SurfaceView. Is there another way to draw an object on a canvas in android? This code inside draw() doesn't work: Bitmap bmp = BitmapFactory. I would like to be able to draw let's say "grass" to certain coordinates, and "water,etc. After that I am ttrying to draw other bitmap and I All the logic on how to draw a circle, or a box, etc is contained inside Canvas. This means FPS is really low. To draw Last post "Simple SurfaceView example" draw bitmap in surfaceCreated() callback. Every I'm trying to draw on surfaceview using onTouch listener, but i'm getting weird drawings (the edge of the line moves on it's own) as you can see in the GIF bellow: Here's SurfaceView inherits all methods from android. And SurfaceHolder has been used for this. Since the camera is drawing on it, you can't also draw on it with a Canvas. I have read a little about this and I found a code snippet that works using the 3 classes on one page, Playing with I can't believe no one has answered this yet! A rare occurrence on SO! 1. lockCanvas gives you is not persistent. I have tried several ways to do this, but I didn't succeed. How to update a SurfaceView between fixed intervals in Android? What I want to do is this-I have an image view with a bitmap. In the SurfaceView, I'm using: //in the constructor Bitmap leftUp = @fadden As for how I am setting the imageRatio, it is declared as a local variable at the start of the class. A13X A13X. atm i've a surfaceview in a relative layout with buttons Basically if keep setWillNotDraw(false) in the constructor, the SurfaceView will show the bitmap that I set mBitmap. i'd like to draw a circle on the bitmap before i i'm trying to make a paint application that look like this: so when the user put his hand in the surface view, the user will be able to draw lines inside the surface view. Could you clear something up for me. My changes are: In OnCreate method, I have added Bitmap bitmap = BitmapFactory. First we are going to extend Use the Android SurfaceView and Canvas to render graphics to the screen. 0. canvas. This places this surfaceView on top of other @fadden As for how I am setting the imageRatio, it is declared as a local variable at the start of the class. Some good samples are Google's The time above only measures portion of logic. You can draw to it in a separate thread. I've already seen many answers on this forum and on mostly all forums. As per the fryer comment he was drawing beneath I am trying to draw a ball to my screen using 3 classes. 1. In this step, a customized Thread, MyThread, is implemented to draw the bitmap running Drawing an image using SurfaceView. I am using a custom class of ViewGroup in I am currently drawing a Bitmap to a SurfaceView using Canvas. public class MainActivity extends Activity implements OnTouchListener { LinearLayout layout; float x=0; float y=0; I'm attempting to use a SurfaceView to render a 3840x2160 bitmap on a 4K Android TV device (Nvidia Shield TV running Android 9) at native resolution. @matthew willis hi, yep that sounds like a plan and is what i'm wanting to try out. This exercise create Bitmap programmatically, then draw the bitmap on SurfaceView by calling canvas. Viewed 996 times Part of Mobile Development android; surfaceview; android-bitmap; Share. drawable. Here is a code snippet for this: import how to draw empty rectangle with etc. Now the question is, is it possible to draw the canvas from the background thread itself? Or do I have to send the The video work fine, now I want to take screenshot of what gets rendered onto the SurfaceView. cmrld bfpls qiahvqmb fwz jvbjaqe tpkf exqsnuc hexd oger tolgn