Android uses intent to realize page Jump

What is intent

Intent can be understood as a messenger (intention) to help complete the communication between Android components

Intent realizes the jump between pages

1> Startactivity (intent) 2 > startactivityforresult (intent, requestcode) onactivityresult (int requestcode, int resultcode, intent data) setresult (resultcode, data) the second startup method can return results

code

FirstActivity.java

SecondActivity.java

first_ layout.xml

second_ layout.xml

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