android - setContentView(R.layout.main); Gives error from start -


i'm starting develop android, , followed tutorial on google set up. i'm using eclipse , have both android sdk , eclipse plugin installed, when create new android project, error on line start.

public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.main); }

it says "r" in "r.layout.main" not exist. there class need create or import? i'm confused because have thoroughly searched , cannot find else issue.

this quite common mistake . make sure @ top of java file of activity , import not of android.r.layout (or whatever) ,since should import r of own app (which inside gen folder).

if still have problems , try delete gen folder , make sure layout file ok (meaning it's correct android layout file, without mistakes), make sure of resources (all images, sounds , xml files , in /res) have legal characters in files names (which means lowercase english ,optionally "_" , digits, no more) , clean project , , import generated file .

you can use ctrl+1 on red underline of r complains , , choose 1 of project.


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