So finally I managed to do this. Firstly I draw a semitransparent black rectangle on whole view. After that using PorterDuff.Mode.CLEAR I cut a transparent circle to show cat’s position. I had problem with PorterDuff.Mode.CLEAR: firstly I was getting a black circle instead of a transparent one. Thanks to Romain Guy’s comments here: comment here … Read more
Here’s a much more efficient method: /** * Sets the text size for a Paint object so a given string of text will be a * given width. * * @param paint * the Paint to set the text size for * @param desiredWidth * the desired width * @param text * the text that … Read more
Like Romain Guy said, “This question is difficult to answer on StackOverflow”. There wasn’t really any complete documentation, and complete documentation would be kind of large to include here. I ended up reading through the source and doing a bunch of experiments. I took notes along the way, and ended up turning them into a … Read more
The set-methods will replace the current Matrix with new values, disregarding whatever the Matrix contained before. The pre and post method will apply a new transformation before or after whatever the current Matrix contains. In this example, the rotation will be ignored since we are using the set method and the m will only contain … Read more
Here is how I solved the problem. Hope this helps. // declare class member variables private GestureDetector mGestureDetector; private OnTouchListener mGestureListener; private boolean mIsScrolling = false; public void initGestureDetection() { // Gesture detection mGestureDetector = new GestureDetector(new SimpleOnGestureListener() { @Override public boolean onDoubleTap(MotionEvent e) { handleDoubleTap(e); return true; } @Override public boolean onSingleTapConfirmed(MotionEvent e) { … Read more
You can override the onDraw method of your view and draw the circle. protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.drawCircle(x, y, radius, paint); } For a better reference on drawing custom views check out the official Android documentation. http://developer.android.com/training/custom-views/custom-drawing.html
For API 21 and above the Path class added a new method addRoundRect() which you can use it like this. corners = new float[]{ 80, 80, // Top left radius in px 80, 80, // Top right radius in px 0, 0, // Bottom right radius in px 0, 0 // Bottom left radius in … Read more
Use the setTypeface method on your Paint object to set the font to something with the bold style turned on. paint.setTypeface(Typeface.create(Typeface.DEFAULT, Typeface.BOLD));
The extra two digits are used to define the colors’ transparency, or alpha channel. Android uses the ARGB format (or AARRGGBB as you use in your example). For more (Android-specific) information, take a look at the Color documentation.
Ok I’ve done it. I’m sharing this code in case someone else will need it: super.draw(canvas, mapView, true); Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); paint.setStrokeWidth(2); paint.setColor(android.graphics.Color.RED); paint.setStyle(Paint.Style.FILL_AND_STROKE); paint.setAntiAlias(true); Point point1_draw = new Point(); Point point2_draw = new Point(); Point point3_draw = new Point(); mapView.getProjection().toPixels(point1, point1_draw); mapView.getProjection().toPixels(point2, point2_draw); mapView.getProjection().toPixels(point3, point3_draw); Path path = new Path(); path.setFillType(Path.FillType.EVEN_ODD); path.moveTo(point1_draw.x,point1_draw.y); … Read more