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Questions tagged [android-rect]

6 questions
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How to draw four boundary corner in canvas for qr code scanner

I need to draw in canvas four boundary corner for qr code scanner. Here is example (I need to draw this four blue boundary corner). I know how to draw rectangle: val rectF = RectF(left, top, right, bottom) canvas.drawRoundRect(rectF,…
testivanivan
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How can detect barcode cornerPoints inside a View?

My barcode reader runs well but I want user can only scan barcode what is inside in view area to detect. I wrote a code for it. I can get cornerPoints of barcode that scanned but I can't realize if it's inside my detection view. I can't see rect…
Ahmet Yılmaz
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Android. How to paint all area around of rectangle?

I have custom view and inside onDraw I need to draw in canvas rectangle. I have RectF with all coordinates. And now I need to paint the entire area around the rectangle in a different color. Is it possible to do this using RectF ? Please help me.
testivanivan
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Android. How to get the bounds of the area associated with this window?

I have code to get the bounds of the area associated with this window: context.getSystemService(WindowManager::class.java).currentWindowMetrics.bounds But this code requires API level 30, my min is 21. Is it possible to do the same but for api 21…
testivanivan
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How to change color of Rects instantly when touched?

I'm working in an app that uses the ml kit text recognition library; The app reads text from images and puts a Rect around every word. Now I want these Rects to change color when the user tap on one of them or swipe above some words. So, I was able…
Ziad H.
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Draw RectF on canvas

I have a view(Calendar) that contains multiple Rects(Events) drawn on it, now I am trying to implement drag/drop as another layer on top of that view. Example- I long-press on an event, it passes me the exact coordinates of the Rect(Event), no I…
Lakhwinder Singh
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