Android custom view drawing four digit random code

Now there is a need to display random numbers directly and simply in the code, but now we directly customize the view to achieve this effect. Let's analyze the wave. We allow developers to set the size, color and text of the textview, and we need to provide custom attributes, OK, let's first introduce the simple use of custom attributes:

First, create the attrs.xml file in the RES / values folder. Because of our function this time, we need to provide three user-defined attributes: texttitle string, textcolor and textsize. The code is as follows:

Let's see how we can use our custom properties in the custom controls in the layout file

Two key codes:

xmlns:custom=” http://schemas.android.com/apk/res/com.qianmo.VerificationCode ”Add a custom space name. Com.qianmo.verificationcode makes our package name start with custom:, for example: Custom: titletextsize

Now that the custom attributes are completed, let's start our custom view. First, choose whether we inherit view or ViewGroup. Obviously, this time we are a simple view, so we choose to inherit view. The code is posted directly below. Each step of the code is very detailed, so I won't explain it to you

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