android – Drawable image on a canvas
Questions: How can I get an image to the canvas in order to draw on that image? How to&Answers: The good way to draw a Drawable on a canvas is not decoding it yourself but leaving it to the system...
Tag Archives: canvas
Android, canvas: How do I clear (delete contents of) a canvas (= bitmaps), living in a surfaceView?
Questions: In order to make a simple game, I used a template that draws a canvas with bitmaps like this: private void doDraw(Canvas canvas) { for (int i=0;i<8;i++) for (int j=0;j<9;j++) for (int...
Creating an empty bitmap and drawing though canvas in Android
Questions: I’d like to create an empty bitmap and set a canvas to that bitmap and then draw any shape on the bitmap. How to&Answers: This is probably simpler than you’re thinking: int ...
Android canvas draw rectangle
Questions: how to draw empty rectangle with etc. borderWidth=3 and borderColor=black and part within rectangle don’t have content or color. Which function in Canvas to use void drawRect(float le...
android – Understanding Canvas and Surface concepts
Questions: I’m struggling to understand the process of drawing to SurfaceView and therefore the whole Surface/Canvas/Bitmap system, which is used in Android. I’ve read all articles and API...
drawing – Draw in Canvas by finger, Android
Questions: I need to build a project for drawing on canvas by fingers, to get the touch event and motion event of my finger, and thence draw. Any one can advice me how to get start in project, and wha...
android – Draw multi-line text to Canvas
Questions: A hopefully quick question, but I can’t seem to find any examples… I’d like to write multi-line text to a custom View via a Canvas, and in onDraw() I have: ... String text...
graphics – Measuring text height to be drawn on Canvas ( Android )
Questions: Any straight forward way to measure the height of text? The way I am doing it now is by using Paint’s measureText() to get the width, then by trial and error finding a value to get an...
Measuring text width to be drawn on Canvas ( Android )
Questions: Is there a method which returns the width ( in pixels ) of a text to be drawn on an Android canvas using the drawText() method according to the Paint used to draw it? How to&Answers: Ha...
java – Android Center text on canvas
Questions: I’m trying to display a text using the code below. The problem is that the text is not centered horizontally. When I set the coordinates for drawText, it sets the bottom of the text a...
