CODEWITHSUNDEEP
androidcolorsimageviewtransparencyandroid-canvas
RiadSaadi
RiadSaadi

Reputation: 401

Fill a canvas with a transparent color in Android

Good Morning,

I have an ImageView that I initialized with #99aaaaaa color (it corresponds to 153,170, 170,170). after that I draw some lines with different colors. and Now I want to Fill my Canvas with the original color (#99aaaaaa).

The method myCanvas.drawColor(OriginalColor) fills the canvas with OriginalColor, but the lines still visible 

    myPaint.setColor(OriginalColor);
    myPaint.setStyle(Paint.Style.FILL);
    myCanvas.drawRect(0, 0, 170, 170, myPaint); // my ImageView is  170X170

Also let lines visible.

Any help please, Thank You

Upvotes: 2

Views: 3403

Answers (2)

Alexander Hugestrand
Alexander Hugestrand

Reputation: 81

Set the transfer mode as follows, before calling drawRec():

paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC));

Reset the painter afterwards, for further drawing:

paint.setXfermode(null);
paint.setColor(0xFFFFFFFF);

Upvotes: 1

Maciej Boguta
Maciej Boguta

Reputation: 1364

as the canvas original color is semi transparent, then you draw something on it and draw another layer of semi transparent stuff, then its pretty obvious youll see the level-down-layer through the top transparent layer isnt it? another words, if you place a half transparent glass on your knees, ull still see the knees through it

Upvotes: 1

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