CODEWITHSUNDEEP
android
tuna
tuna

Reputation: 105

android onDraw not drawing png

I have a class called Preview that is added as a child to one of my FrameLayouts. This is the Preview's onDraw method. fingerprint.png is in my drawable folder, and 

    protected void onDraw(Canvas canvas) {
    System.out.println("on draw");

    Resources res = getResources();
    fingerprint = res.getDrawable(R.drawable.fingerprint);
    fingerprint.draw(canvas);
    //fingerprintScaled.draw(canvas);

}

"on draw" prints, but the fingerprint image is not rendered.

Upvotes: 1

Views: 2378

Answers (1)

Raigex
Raigex

Reputation: 1215

The reason it is not drawing is because you are calling draw wrong. in protected void onDraw(Canvas canvas) do something like this (except dont decode stuff in onDraw)

Bitmap fingerprint = BitmapFactory.decodeResource(context.getResources(),R.drawable.icon_resource);

canvas.drawBitmap (fingerPrint, aMatrix, paintToDraw);

this should draw your bitmap properly.

Upvotes: 3

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