Android implementation of sending SMS verification code countdown function example
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Android
1、 Introduction:
In the development of functions such as user registration or password retrieval, it is often encountered to obtain the SMS verification code. After obtaining the verification code, you need to wait for 1 minute countdown. During this period, you can't send the SMS request again.
design sketch:
2、 Implementation steps:
1. A key class: countdowntimer (countdown function class of Android system)
2. Call in the right place
use:
3、validate_ code_ press_ bg.xml
validate_ code_ normal_ bg.xml
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