Android implements rounded image with stroke

Using the learned bitmapshader rendering class, we implement a rounded image with stroke.

Specific implementation:

The layout file RES / layout / main.xml used to display custom drawing classes:

Open mainactivity, create an internal class named MyView in the file, inherit android.view.view class, add construction method and override OnDraw (canvas) method, and draw in it:

In the OnDraw (canvas) method, first define a brush and set it to use the anti aliasing function, then define a background, then define an area of the rounded rectangle to be drawn, translate the canvas 40 pixels on the X axis, 20 pixels on the Y axis, and then draw a black 2-pixel rounded rectangle as the edge of the picture, Finally, draw a rounded rectangle rendered with bitmapshader. The specific code is as follows:

MainActivity:

The operation effect is shown in the figure

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