Android Canvas Draw Bitmap From Resource

Android Draw SVG to Canvas ImageView is used to display Bitmap, Drawable or such image sources. You can vote up the examples you like. How to create sketch android application with clear screen button using Paint, Bitmap and Path class. Rendering Text in OpenGL on Android Updates: * November 2013 - Added v1. Bitmap; Get Texture From Bitmap Resource and BitmapFactory. If something works without a compile-time error, the app stops with a java null object reference while debugging and it seems that the compiler hasn't picked up my green. setBitmap(bitmap); 그러면 향후에 canvas 에 그리는 모든 작업은 bitmap 에 반영이 됩니다. This blog post is part one of a two-part tutorial series where I will show you how to build simple but delightful Android drawing app. If this canvas element's bitmap has no pixels (i. No comments: How to Check if Sim Card Exists in the android dev How to Draw an image as a map overlay in. BitmapFactory) class. then I draw the duplicate ~50 times. android canvas画bitmap生成新的bitmap (resources,R. 67 (480x800), when scale it and draw on the screen with 1. DrawBitmap - 30 examples found. You will draw your original image into this blank bitmap. Android Note: Scale the bitmap and keep aspect ratio In the previous post, Matrix. This is tested and works with API 22+ (have not tested it with earlier versions):. Get Texture From Bitmap Resource and. Drawable d = context. the gotcha here is you actually draw on the mask with bitmap in BitmapShader of paint. BitmapFactory) class. Canvas Element allows for dynamic, scriptable rendering of 2D shapes and bitmap images. Drawing on a SurfaceView. We can load a bitmap using Bitmap globe = BitmapFactory. Three typical ways use BitmapFactory to create Bitmaps are to create a bitmap from a resource, file, or InputStream. CalendarAlerts. This library defines API for drawing application. jpg resource. Drawing on the surface of a bitmap is the same as drawing on a video display. So I make a text bitmap. If i use the same Code to draw directly into a Bitmap, the transparency is gone, right side o the Image. Actual drawing happens in a Bitmap that is placed into a window. postScale() is used to draw the bitmap, but the result is not perfect. Bitmap) Initializes the canvas for drawing on this bitmap. That is you create a Canvas object, associate it with a Bitmap, and you can use the Canvas object's methods to draw on the Bitmap. 12113 A Broccoli object with a stem length of more than 25 pixels involves from CSE 8a at University of California, San Diego. Draw Bitmap on Canvas with Matrix : Bitmap « 2D Graphics « Android. Increase the offset. Rename Package in Eclipse; Combine bitmap side-by-side; Ketai: library for the Android Mode in Processing. Android Studio. Canvas canvas) Draws the contained bitmap onto the canvas at 0,0 with a Non-Android accessor that tells you the resource id that this. 0 许可协议进行翻译与使用 回答 ( 2 ). java) is included in the DevDaily. I wanted to make dynamically text and draw text in a circle on the template of the image. First we will create application for drawing on canvas. By your code: use canvas. In this really simple mini-project we will really harness the power of classes and objects by using classes from the Android API which allow us to draw graphics on the screen. Crop cropped cut bitmap image pictures Android example - 42,612 views; Create bitmap and draw text into bitmap Android example - 41,266 views; AsyncTask Example Android with ProgressBar - 40,638 views; Categories. In this tutorial we are simply rotating the bitmap image which is called from drawable folder and rotate that image to 45° angle. CreateBitmap if I want to draw a specific resource, say icon. A Drawable that wraps a bitmap and can be drawn with rounded corners. How do I draw bitmap foreground on background without using another Canvas? Solution: 1) First create bitmaps from resources with additional opt. Hello guys I need to save a canvas result into a SD Card. https://www. ・With layers you can draw different things on different layers. Using a BitmapFactory, you can create bitmaps in three common ways: from a resource, a file, or an InputStream. Capturing Digital Signature in android. Often, however, you want to work with a different coordinate system. This article demonstrates the first approach: The second approach is discussed in the article Accessing SkiaSharp Bitmap Pixels. hi, im drawing a RadialGradient with transparency on a canvas, works well, left side of the Image. Using custom view allows the developer allow to do certain performance optimization, i. Android example source code file (GraphicsPerformanceTests. The onDraw() method displays the extra bitmap in the view's canvas. B4X Community - Android, iOS, desktop, server and IoT programming tools Canvas. Making round corners on the image by using a mask Put an ImageView and a mask view in a RelativeLayout. In Android, to draw something you need four basic components. Google Maps Platform Premium Plan. @Override public void draw(int texture public Bitmap capture(int. It is also referred to as "Brush". * @deprecated Use {@link #BitmapDrawable(android. The Canvas class holds the "draw" calls. Drawable 크기만한 빈 Bitmap. SVG (Scalable Vector Graphics) is used to define vector-based graphics. Create simple game engine project. And then draw the bitmap to the screen. Rect, Circle), and a paint (to describe the colours and styles for the drawing). 1-At first get a bitmap to crop a shape from it. For Android development, from beginner to beginner. There are lots of different Canvas drawing methods and even a facility to transform the basic. Android provides us with 2D drawing APIs that enable us to draw our custom drawing on the Canvas. You can click to vote up the examples that are useful to you. After changing the image format into bitmap we can easily set that image on canvas area on activity screen. I wanted to make dynamically text and draw text in a circle on the template of the image. 63'' Wooden Beads online at joann. Android Bitmap和Canvas学习笔记 2012-02-15 15:38 本站整理 浏览(5) 位图是我们开发中最常用的资源,毕竟一个漂亮的界面对用户是最有吸引力的。. Google Play Protect, regular security updates, and control over how your data is shared. Fine-tune your designs with our advanced path editor, export anything from your canvas, and more. It uses JavaScript to draw graphics on a web page. 12113 A Broccoli object with a stem length of more than 25 pixels involves from CSE 8a at University of California, San Diego. Android Canvas is a graphic component which allows us to call the draw() method to draw or write anything on the screen. Treat the specified array of colors as a bitmap, and draw it. Here,I used canvas in order to zoom image view with image including using setImageMatrix(). xml: [code ]). The ImageBitmap interface represents a bitmap image which can be drawn to a canvas without undue latency. saveLayer because otherwise everything we previously drawn will be erased by our paint. Android calls this method when it decides a View needs to draw itself and passes in a Canvas object for the View to work with. Irregular Shapes – Part 4 July 25, 2014 August 28, 2014 Mark Allison 4 Comments Previously in this series we’ve looked at how to display images with irregular outlines, beginning with simply rounding the corners, but also displaying them in a speech bubble. Android: Scale a watermark Bitmap over another Bitmap using the Matrix Posted by twig at 5:39 PM Thursday, October 6, 2011 What I set out to do was to overlay a logo over a photo and it was surprisingly easy with the use of the Matrix class. Rect, Path, text, Bitmap), and a paint (to describe the colors and styles for the drawing). Create an empty drawable, setting initial target density based on the display metrics of the resources. A sprite is a two-dimensional image or animation that is integrated into a larger scene. If that's a concern, consider using setImageDrawable(android. To draw something, you need 4 basic components: A Bitmap to hold the pixels, a Canvas to host the draw calls (writing into the bitmap), a drawing primitive (e. The Canvas provides an API to draw on the bitmap, the Paint is for styling what you draw, and the View displays the Bitmap. getDrawable(R. In this step you will draw a frame around the edge of the picture. It can be defined in an XML file with the element. NET 12/1/2012 4:27:32 AM. If your object is moving, or you otherwise regularly need to redraw, you’re better off with a Canvas. Bitmap Bitmap 은 머야? 안드로이드에서 이미지를 표현하기 위해 사용되는 녀석이 Bitmap입니다. So the second trick (not just for Canvas but for any game) is pre-allocate arrays of objects at the start. To capture the Digital Signature using android canvas, we first create an XML file which contains the canvas on which we can register our signatures using our fingers or stylus. Normally there's. Android app draw bitmap on canvas center drawable to arc line free a drawerlayout drawer menu. Draw the bitmap through the mesh, where mesh vertices are evenly distributed across the bitmap. hi, im drawing a RadialGradient with transparency on a canvas, works well, left side of the Image. Hello guys I need to save a canvas result into a SD Card. Right now I can draw a bitmap, but I have still one problem! Because the quality of the right screen is really bad (see image): PROBLEM SOLVED: What I did is using a MemoryStream which compress the Bitmap to. res/drawable폴더속에 img1. Android is developed by a consortium of developers known as the Open Handset Alliance, with the main contributor and commercial marketer being Google. It's a simple example to draw a bitmap on screen in View. Clone via HTTPS Clone with Git or checkout with SVN using the repository's web address. In a standard bitmap image, each dot can be assigned a different color. In entire screen became to zoom in/out then when i click on zoom button i pass one Boolean as false which stop zooming and draw line on touch of finger. drawing upwards), and rotating clockwise. Bitmap scaledBitmap = Bitmap. Create a new image bitmap and attach a brand new canvas to it. android canvas 绘制bitmap并保存到本地 自定义一个view,重载draw方法(不是重载ondraw,不然图片保存下来是空白的。) Android——new Canvas(Bitmap)中对canvas和bitmap的理解 最近刚接触自定义View的时候,看到Canvas有一个构造函数需要传入一个Bitmap,不解。于是有了这篇文章!. getResources(), R. postScale() is used to draw the bitmap, but the result is not perfect. CalendarAlerts. For Android development, from beginner to beginner. Add the image files you want to display (png, jpeg, etc. Vector XML files are of type Drawable and not Bitmap and need to be converted to Bitmap. 67 (480x800), when scale it and draw on the screen with 1. Every website built by Nplexity is a custom creation that uses cutting edge design trends and the latest in HTML5/CSS/Javascript technology to fulfill your specific needs. For more information, see the guide to Drawable Resources. C# (CSharp) Android. android:largeHeap = " true " Step 3: Get rounded corner image bitmap from the optimized bitmap obtained from the step2. If you don't have an original bitmap, but an original Drawable. Object └─ android. New Free Drawing & Coloring. Canvas Game for Android - Lesson 1 Intro to Canvas Games Drawing bitmap on Canvas - no game. In Android the Bitmap class represents a Bitmap image. Vector XML files are of type Drawable and not Bitmap and need to be converted to Bitmap. In its constructor I simply register it to receive events when touching the surface and load the resources. decodeResource(context. 1 stars 2 stars 3 stars 4 stars 5 stars. density; // draw text to the Canvas center. Draw them all to the canvas. Right? In the MyView. Android Canvas is a graphic component which allows us to call the draw() method to draw or write anything on the screen. Bitmap; Get Texture From Bitmap Resource and BitmapFactory. Android drawable resources tutorial, android drawables, bitmap drawable, bitmap xml drawable, nine patch drawable, level drawable, clip drawable, state drawable, leyer drawable, shape drawable, scale drawable, inset drawable and transition drawable examples. You can rate examples to help us improve the quality of examples. It is as easy as to follow the right people and then just checking their regular insights in your feed. JPG with a quality of 100 and decode the byte array to a Bitmap. Bitmap extracted from open source projects. For example: Canvas. The following image shows the default view hierarchy of Android. Fwd: Android Google maps and Bitmap marker icon issue. It is currently taking around 8 secs to load 3 512x512 textur. android:largeHeap = " true " Step 3: Get rounded corner image bitmap from the optimized bitmap obtained from the step2. Android app draw bitmap on canvas center drawable to arc line free a drawerlayout drawer menu. @Override public void draw(int texture public Bitmap capture(int. A Drawable is a general abstraction for "something that can be drawn. Use canvas size as Rect dst. You create bitmaps via the BitmapFactory (android. * A drawable that draws a bitmap in a flipped or rotated orientation without having to adjust the * bitmap public class OrientedBitmapDrawable extends BitmapDrawable {. The Canvas is acquired using a SurfaceView, this is a drawable. So there is no general reliable way to calculate the coordinates for anything you want to draw on top of what ImageView has drawn. -- You received this message because you are subscribed to the Google Groups "Android. A Drawable is an object that can be drawn. globe); in onDraw() method, we can rotate the bitmap using canvas. It is also referred to as "Brush". Canvas Element allows for dynamic, scriptable rendering of 2D shapes and bitmap images. Access the pixel bits directly. Bitmap will be scaled to fit the full width of the region and will be aligned to the top left corner. 16, I can't run the game on my android device unless I launch it on the mobile directly from the editor. img1); - bitmap로부터 변환 Drawable d = (Drawable)(new Bitmap. If something works without a compile-time error, the app stops with a java null object reference while debugging and it seems that the compiler hasn't picked up my green. We use the Canvas object to perform drawing. Crop cropped cut bitmap image pictures Android example - 42,593 views; Create bitmap and draw text into bitmap Android example - 41,228 views; AsyncTask Example Android with ProgressBar - 40,621 views; Categories. EditText; import android. The Bitmap (android. A Drawable that wraps a bitmap and can be drawn with rounded corners. Bitmap; Get Texture From Bitmap Resource and BitmapFactory. DrawBitmap(_bitmap, 0, 0, null); } (2) サイズの取得. A Bitmap to hold pixels; A Canvas to host the draw calls (writing on to a Bitmap ). You can click to vote up the examples that are useful to you. Save() is to save the state of Canvas ,and then you can rotate the canvas or translate the canvas , and then you can use the canvas. Graphics Canvas. - A custom view is implemented, which overrides onDraw() function call. Canvas开篇之drawBitmap方法讲解 前面讲了paint,后面会花几篇主要讲讲canvas,并且由于最近项目比较紧,所以近期的文章都会“短小精悍”; paint 作为画笔,里面有非常多而强大的设置方法,比如设置颜色过滤器,设置位图渲染、渐变,设置图像的混合模式等等,而canvas呢?. ARGB_8888); Canvas c = new Canvas(b); Now your Canvas will draw onto the defined Bitmap. Android app draw bitmap on canvas center drawable to arc line free a drawerlayout drawer menu. * Also see the {@link android. Resources, android. The Bitmap should be the same size as your view. In this Android tip, I am going to show you how to do a simple image editing task by adding another image on it. createScaledBitmap (bitmap, IMAGE_WIDTH, IMAGE_HEIGHT, true) ; A Drawable that wraps a bitmap and can be tiled, stretched, or aligned. You can create a RoundedBitmapDrawable from a file path, an input stream, or from a Bitmap object. Android Note: Scale the bitmap and keep aspect ratio In the previous post, Matrix. It is possible to draw bitmap directly to canvas from BitmapDecoder. Rate This : Android Draw Bitmap On Canvas A Circle Xml Drawer Menu Drawable Importer. I have reseached densities etc but this is not what I need. So it looks like the text has a long shadow underneath it. Is it possible to draw a smooth circle in any other way or maybe use some filter to smoothen the jagged output from the canvas object?. The graphic to the left is created with. Context; import android. Access the pixel bits directly. getIntrinsicHeight(), drawable. blah) • drawCircle, drawOval, drawRect, drawRoundRect, drawArc, drawLine. Load Bitmap from resource //package com. Caution: You can't draw on a surface with GLES or send it frames from a video decoder if you've ever called lockCanvas(). @Override public void draw(int texture public Bitmap capture(int. getDrawable(R. Bitmap) and BitmapFactory instead. The Bitmap class is simply an object that references a bitmap image. Using views to draw lines in Android. The canvas element has several methods for drawing paths, boxes, circles, characters, and adding images. Rate This : Android Draw Bitmap On Canvas A Circle Xml Drawer Menu Drawable Importer. Add the image files you want to display (png, jpeg, etc. JPG with a quality of 100 and decode the byte array to a Bitmap. The Android framework will draw a bitmap on the Canvas for us once our onDraw() method is complete with all our desired functionality. Attach the canvas to the ImageView. i basically have a for loop which goes from 1 to 5 and i want to see the image being rotated 5 times i. Why should we use hardware Bitmaps? Only one copy of pixel data is stored for hardware Bitmaps. You can create your own canvas from your own Bitmap outside of onDraw easily. Bitmap contact_pic = BitmapFactory. Check out a handy algorithm for taking any bitmap on an Android user's phone and cutting out a circle or a rectangle. By not calling onDraw method (we call our own implementation doDraw) , we ensure that android system will not invalidate our panel. Create a canvas with the mutable bitmap to draw into. How to show drawable resource image as bitmap just above surface of canvas in android on button click. Salut à tous, je voulais tester de refaire par moi même une double buffering sur android (je sais, il le fait automatiquement). ARGB_8888, true)); You then can draw on the canvas. Three typical ways use BitmapFactory to create Bitmaps are to create a bitmap from a resource, file, or InputStream. I'm very new to Android and OpenGL coding (I have previously used ogre3d). [Android SDK] 設定画面のレイアウトをカスタマイズする [Android SDK] ImageViewを最前面にフローティングさせる [Android SDK] 埋め込みテキストファイルから文字列を取り出す [Android SDK] ResourceからカラーフィルタしたBitmapを作成する [Android アプリ] メモガキ (Memogaki)の. I don't understand the reasoning behind this. Am I doing something wrong, or is the quality simply deteriorated when you pass from Canvas to Bitmap? On a side note, the reason why I'm drawing text on a Bitmap is to obtain a "magnifier" effect on the text in question (like Apple OSX's dock), since I can then apply arbitrary transformations to it using a bitmap mesh. By not calling onDraw method (we call our own implementation doDraw) , we ensure that android system will not invalidate our panel. " Most often you will deal with Drawable as the type of resource retrieved for drawing things to the screen; the Drawable class provides a generic API for dealing with an underlying visual resource that may take a variety of forms. Canvas; Get Texture From Bitmap Resource and BitmapFactory. BlockedNumbers; Browser; CalendarContract; CalendarContract. Drawing drawable folder resource image above canvas by simply converting image into bitmap. There are meshWidth+1 vertices across, and meshHeight+1 vertices down. In this step you will draw a frame around the edge of the picture. * If the bitmap and canvas have different densities, this function will take care of * automatically scaling the bitmap to draw at the same density as the canvas. That is you create a Canvas object, associate it with a Bitmap, and you can use the Canvas object's methods to draw on the Bitmap. Its simple, but we have to know the save() and restore() methods in Canvas class. The simplest case is a graphical file (bitmap), which would be represented in Android via a BitmapDrawable class. When working with 2D drawings, we will either draw on view or directly on the surface or Canvas. The code I used is. The ImageBitmap interface represents a bitmap image which can be drawn to a canvas without undue latency. My guess is that I probably wanted to get the bitmap from the canvas, but I can't find ways to get it. [android-developers] Re: Create Bitmap from BitmapDrawable? Wrap a canvas around this new mutable bitmap (new Canvas(bmCopy)) > - Just draw on this canvas. So here is the complete step by step tutorial for Create Draw Bitmap image on Canvas in android programmatically. Then finally draw the original on top of it. Hi, i made a small modification just for testing purpose and need some help. Canvas Game for Android - Lesson 1 Intro to Canvas Games Drawing bitmap on Canvas - no game loop yet. A Drawable that wraps a bitmap and can be tiled, stretched, or aligned. For this, first convert the bitmap into drawable objects. DrawBitmap(Bitmap, Single, Single, Paint) DrawBitmap(Bitmap, Single, Single, Paint) Draw the specified bitmap, with its top/left corner at (x,y), using the specified paint, transformed by the current matrix. Drawable d = context. Friday, September 7, 2012. setBitmap(bitmap); 그러면 향후에 canvas 에 그리는 모든 작업은 bitmap 에 반영이 됩니다. Capturing Digital Signature in android. Canvas를 연결 한 뒤. InputStream; import android. getIntrinsicHeight(), drawable. A bitmap is a 2D grid of pixels that form an image. And draw source bitmap and mask on canvas: canvas. Now we have everything referent to our sprite inside this class. If this canvas element's bitmap has no pixels (i. Everything we're going to be doing today is with android. For example, if you instantiate two Drawable objects from the same image resource and change a property (such as the alpha) for one object, then it also affects the other. Canvas canvas = new Canvas(alteredBitmap); Last, we'll need a Paint object. Image drawable is stored in the drawable folder inside the res folder. com/learn-by-doing-android-for-beginners/ Bitmap Drawables. Android Bitmap和Canvas学习笔记 Resources res=getResources(); 显示位图,或者借助于BitmapDrawable来将Bitmap绘制到Canvas。. | up vote 0 down vote How about reading the docs: drawBitmap(Bitmap bitmap, float left, float top, Paint paint) Draw the specified bitmap, with its top/left corner at (x,y), using the specified paint, transformed by the current matrix. Before we can start drawing, we need to talk about the canvas grid or coordinate space. A Drawable is a general abstraction for "something that can be drawn. In Android, to draw something you need four basic components. Sets a drawable as the content of this ImageView. For this, first convert the bitmap into drawable objects. BlockedNumbers; Browser; CalendarContract; CalendarContract. AlarmClock; BlockedNumberContract; BlockedNumberContract. Everything else seems to work fine. ) to your Visual Studio project, and make sure their Build Action is set to Content. News: The Internet Crime Fighters Org (Dr Don ICFO) Increasing Internet Crime Awareness One Share at a Time Since 2004 – Join Our War. I'm writing a card game and need my cards to be different sizes in different circumstances. getIntrinsicWidth(), drawable. The following are Jave code examples for showing how to use drawBitmap() of the android. So I make a text bitmap. Crop cropped cut bitmap image pictures Android example - 42,642 views; Create bitmap and draw text into bitmap Android example - 41,292 views; AsyncTask Example Android with ProgressBar - 40,666 views; Categories. To load and draw a bitmap, first add a CanvasControl to your XAML page. ui; import java. onDraw(Canvas) i am calling: canvas. jpg resource. Draw bitmap on canvas Modify onDraw(Canvas canvas). Bitmap scaledBitmap = Bitmap. 1 stars 2 stars 3 stars 4 stars 5 stars. Android app draw bitmap on canvas center drawable to arc line free a drawerlayout drawer menu. 12113 A Broccoli object with a stem length of more than 25 pixels involves from CSE 8a at University of California, San Diego. Then the bitmap images are drawn on the canvas. ・With layers you can draw different things on different layers. Rate This : Android Draw Bitmap On Canvas A Circle Xml Drawer Menu Drawable Importer. In this android programming source code example, we are going to draw a Bitmap or Image drawable in Android Canvas. Hello guys I need to save a canvas result into a SD Card. Irregular Shapes – Part 4 July 25, 2014 August 28, 2014 Mark Allison 4 Comments Previously in this series we’ve looked at how to display images with irregular outlines, beginning with simply rounding the corners, but also displaying them in a speech bubble. then I draw the duplicate ~50 times. your_image); Then make the bitmap mutable and create a canvas over it: Canvas canvas = new Canvas(bitmap. // save current status. Hi, i made a small modification just for testing purpose and need some help. createScaledBitmap (bitmap, IMAGE_WIDTH, IMAGE_HEIGHT, true) ; A Drawable that wraps a bitmap and can be tiled, stretched, or aligned. Access the pixel bits directly. Create a Bitmap from an image file via BitmapFactory. There are lots of different Canvas drawing methods and even a facility to transform the basic. Android Rotate and Scale Bitmap Example I built an Android demo app so I could test my understanding of displaying bitmaps on a canvas. Graphics Canvas. I have a Surfaceview thread and an off canvas texture bitmap that is being generated (changed), first row (line), every frame and then copied one position (line) down on regular surfaceview bitmap to make a scrolling effect, and I then continue to draw other things on top of that. double size). ☆Draw efficiently ・Snap guides make drawing in perspective easy. Bitmap Bitmap 은 머야? 안드로이드에서 이미지를 표현하기 위해 사용되는 녀석이 Bitmap입니다. 1 stars 2 stars 3 stars 4 stars 5 stars. public class GlideImageGetter implements Html. Class Overview. To do this, you create a Bitmap object to encapsulate the image, and then load it into your UI. The Premium Plan license provides enhanced support for the Maps SDK for. In this tip, I will guide the way to create a bitmap by cutting from a part of an original bitmap. SVG (Scalable Vector Graphics) is used to define vector-based graphics. Read on for more on drawing […]. drawBitmap(src, 0, 0, null); canvas. The Android framework will draw a bitmap on the Canvas for us once our onDraw() method is complete with all our desired functionality. I have (lots of) 8x8 pixel images and would like to paint them to the canvas in 16x16 pixl fomat (i. Create a blank Activity and call it SimpleGameEngine. The content view is set to a View, and the drawing is achieved in onDraw method. Canvas — to run the drawing commands on. Drawable) or setImageBitmap(android. Create Draw Bitmap image on Canvas in android programmatically. I wanted to make dynamically text and draw text in a circle on the template of the image. In this Android tip, I am going to show you how to do a simple image editing task by adding another image on it. How do I use a Canvas? To draw onto a canvas in Android, you will need four things: A bitmap or a view — to hold the pixels where the canvas will be drawn. More examples of drawing on canvas of custom View listed HERE. With Safari, you learn the way you learn best. And draw source bitmap and mask on canvas: canvas. setBounds (0, 0, widthPixels, heightPixels); drawable. Draw on the bitmap using standard Canvas drawing methods. Note: The canvas obtained when an app locks a surface with lockCanvas() is never hardware accelerated.