android - java and xml file not linking -


i have been trying make food recipes application on android studio 2.1. everytime make new project or open old project, there's error in "setcontentview" line showing r can't linked ( please see image attached)image of problem in code.even try call id's of buttons,webview,etc, there's error in "r" part,which think due fact "res" not getting linked java file. have tried following things none worked , error still there:

  1. downloaded android studio 2.1 again google.developers website
  2. cleaned , run project again.
  3. downloaded every tool in sdk manager except google play.
  4. i have java se 8u101 (latest , downloaded oracle site).
  5. did gradle sync in project.
  6. checked respective xml files , it's error free.
  7. same error every java file , every project made on studio.

same project running without error in "setcontentview" line in android studio 1.2 version.thanks.

assuming app's application id com.example.intel, add line 

import com.example.intel.r

android.r not correct import your xml files.

if r cannot resolved, have error in xml files , can't generate r.java


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