Search code examples
androidequalspaint

Check whether or not Paint objects are visually the same

I was wondering if there is a good way for Paint comparison.

For example, consider the following code:

Paint paint1 = new Paint();
paint1.setColor(Color.BLUE);
Paint paint2 = new Paint(paint1);
Paint paint3 = new Paint(paint1);
paint3.setColor(Color.YELLOW);

In this case, I would like to write some code that says that:

  • paint1 is the same as paint2
  • paint1 and paint2 are not the same as paint3.

Of course, you cannot use e.g., paint1 == paint2 as these are two different objects. Also, it seems that paint1.equals(paint2) is not working.

Is there a way? Or should I individually compare the attributes (such as color, alpha, strokeCap) that I think are important?

Solution

  • Look on the Paint class implementation here. Check what constructor Paint(Paint p) does, what attr it sets. There is a hidden API method hasEqualAttributes(Paint p). Maybe you can use this method code in your app.