This is what problem-CodePudding

Refer to just into the pit small white help children's

CodePudding user response:

Id can only have one, you delete the first id

CodePudding user response:

reference m - 1/f, oj response:

id can only have one, you delete the first id

is to remove textview that line, please delete the wrong too

CodePudding user response:

refer to the second floor weixin_45341460 response:

Quote: reference m - 1/f, oj response:
id can only have one, you delete the first id

is the line, please delete the wrong also delete textview

deleted showed android: text "helloword"/& gt; Mismatched tag errors

CodePudding user response:

Need to start tag and the end tag is the corresponding, you start tag is & lt; Android. Support. The constraint. ConstraintLayout> , then remove & lt;/RelaRelativeLayout> This line; Start tag is & lt; RelativeLayout> , then remove & lt;/android. Support. The constraint. ConstraintLayout> This line

CodePudding user response:

reference weixin_45341460 reply: 3/f

Quote: refer to the second floor weixin_45341460 response:

Quote: reference m - 1/f, oj response:
id can only have one, you delete the first id

is the line, please delete the wrong also delete textview

deleted showed android: text "helloword"/& gt; Mismatched errors tag

Remove @ id/textview that line