Android drawCircle with different colour border

问题:

Is it possible to draw a circle on a canvas in Android with a different colour border using only one drawCircle method?

I have noticed the PaintStyle of FILL_AND_STROKE but cant seem to have different colours for both the fill and the border.

I really don't want to have to call two drawCircle methods.

回答1:

Definition of Paint.Style says:

Paint.Style The Style specifies if the primitive being drawn is filled, 
stroked, or both (in the same color). 

So it seems it can't be done in one go.

If you do this a lot you can create a static helper method that does two calls to draw bordered circle.

Or you could create a custom android.graphics.drawable.shapes.Shape object and override its draw(..) method.

回答2:

Thanks Peter Knego!

if in case any one in need of Shape xml here it is

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" 
 android:shape="oval">
    <solid android:color="#FFFFFF"/>
    <stroke android:width="5dp" android:color="#FFFF00" />
    <size
        android:width="50dp"
        android:height="50dp" />

    <corners android:radius="20dp" />
</shape> 

回答3:

Try making a class and creating the circle with borders by making two one smaller than the other then use the class as your shape instead of the predefined shapes

回答4:

You can draw a circle with Syle.STROKE a layer over the other circle.