How to rotate a rectangle drawn on canvas in Android?

android rotation android-canvas draw rect
Antrromet picture Antrromet · Oct 24, 2012 · Viewed 12.6k times · Source

I am drawing a text on android canvas using the following piece of code

        Rect rect = new Rect();
        paint.getTextBounds(text, 0, text.length(), rect);
        canvas.translate(xPosition + position.getX(), yPosition + position.getY());
        paint.setColor(Color.BLUE);
        paint.setStyle(Style.STROKE);
        canvas.drawRect(rect, paint);
        paint.setStyle(Style.FILL);
        paint.setColor(text_color);
        canvas.translate(-(xPosition + position.getX()), -(yPosition + position.getY()));
        canvas.rotate(getDegreesFromRadians(angle), xPosition + position.getX() + rect.exactCenterX(), yPosition + position.getY() + rect.exactCenterY());
        canvas.drawText(text, xPosition + position.getX(), yPosition + position.getY(), paint);

This code takes care of the rotation of the text and it works fine. I am drawing a blue rectangle around the text using the above code. Now my problem is that the rectangle is not rotating along with the text. It still remains the same. Is there any way to rotate the rectangle drawn in android canvas?

Answer

NikkyD picture NikkyD · Oct 24, 2012

please use

canvas.save();
canvas.rotate();
//stuff to draw that should be rotated
canvas.restore();

else you have to compensate for every rotation afterwards

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