Comments in Android Layout xml

Question

I would like to enter some comments into the layout XML files  how would I do that

User · Answer

There are two ways you can do that

Start Your comment with ""

Example 
Highlight the part you want to comment and press CTRL + SHIFT + /

User · Answer

click the     ctrl shift     and write anything you and evrything will be in comments

User · Answer

From Federico Culloca s note         Also you cannot use them inside tags   Means  you have to put the comment at the top or bottom of the file - all the places you really want to add comments are at least inside the top level layout tag

User · Answer

The World Wide Web Consortium  W3C  actually defined a comment interface  The definition says all the characters between the starting    lt  --  and ending  -- gt   form a part of comment content and no lexical check is done on the content of a comment   More details are available on developer android com site   So you can simply add your comment in between any starting and ending tag  In Eclipse IDE simply typing  lt  -- would auto complete the comment for you  You can then add your comment text in between   For example     lt LinearLayout xmlns android  http   schemas android com apk res android      xmlns tools  http   schemas android com tools      android layout width  fill parent      android layout height  fill parent      android orientation  vertical      tools context   TicTacToe   gt     lt  -- This is a comment -- gt    lt  LinearLayout gt    Purpose of specifically mentioning in between is because you cannot use it inside a tag    For example    lt TextView      android text   string game title       lt  -- This is a comment -- gt      android layout height  wrap content      android layout width  fill parent   gt    is wrong and will give following error   Element type  TextView  must be followed by either attribute specifications    gt   or    gt

User · Answer

ctrl shift    You can comment the code    lt  --           lt View           android layout marginTop   dimen d10dp            android id    id view1            android layout below    id tv change password            android layout width  fill parent            android layout height  1dp            android background   c0c0c0   gt -- gt

User · Answer

As other said  the comment in XML are like this   lt  -- this is a comment -- gt    Notice that they can span on multiple lines   lt  --     This is a comment     on multiple lines -- gt    But they cannot be nested   lt  -- This  lt  -- is a comment -- gt  This is not -- gt    Also you cannot use them inside tags   lt EditText  lt  --This is not valid-- gt  android layout width  fill parent    gt

User · Answer

Comments INSIDE tags possible  It s possible to create custom attributes that can be used for commenting documentation purposes   In the example below  a documentation info attribute is defined  with an example comment value    lt RelativeLayout     xmlns android  http   schemas android com apk res android      xmlns documentation  documentation mycompany com      android layout width  match parent      android layout height  match parent      android id    id relLayoutID      documentation info  This is an example comment   gt        lt TextView         documentation purpose  Instructions label          android layout width  wrap content          android layout height  wrap content          android text  Click here to begin           android id    id tvMyLabel          android layout alignParentTop  true          android layout alignParentStart  true          documentation info  Another example comment          documentation translation notes  This control should use the fewest characters possible  as space is limited            gt    lt  RelativeLayout gt    Note that in this case  documentation mycompany com is just a definition for the new custom XML namespace  of documentation   and is thus just a unique URI string - it can be anything as long as it s unique  The documentation to the right of the xmlns  can also be anything - this works the same way that the android  XML namespace is defined and used   Using this format  any number of attributes can be created  such as documentation info  documentation translation notes etc   along with a description value  the format being the same as any XML attribute   In summary    Add a xmls my new namespace attribute to the root  top-level  XML element in the XML layout file  Set its value to a unique string Under any child XML element within the file  use the new namespace  and any word following to define comment tags that are ignored when compiled  e g   lt TextView my new namespace my new doc property  description    gt

User · Answer

you can also add comment by pressing Ctrl shift   and shift    for one line

User · Answer

lt  -- comment here -- gt

User · Answer

If you want to comment in Android Studio simply press   Ctrl     on Windows Linux   Cmd     on Mac   This works in XML files such as strings xml as well as in code files like MainActivity java

User · Answer

Unbelievably  in 2019 with Android studio 3 3  I don t know exact version  at least 3 3   it is possible to use double slash comment to xml   But if you use double slash comment in xml  IDE shows warning    lt  xml version  1 0  encoding  utf-8   gt   lt android support constraint ConstraintLayout      xmlns android  http   schemas android com apk res android      xmlns app  http   schemas android com apk res-auto      android layout width  match parent      android layout height  match parent  gt          this works         this works too                multi line comment     multi line comment              lt TextView         android layout width  wrap content          android layout height  wrap content          android text  Hello World  yeah          app layout constraintBottom toBottomOf  parent          app layout constraintLeft toLeftOf  parent          app layout constraintRight toRightOf  parent          app layout constraintTop toTopOf  parent    gt    lt  android support constraint ConstraintLayout gt

User · Answer

XML comments start with  lt  -- and end with -- gt    For example    lt  -- This is a comment  -- gt

[android] Comments in Android Layout xml

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