Android Studio Advice

Question

On my Android Studio, it says it "cannot resolve R symbol." So I tried rebuilding it and cleaning it several times, but it's still like this.

What do I do?

Here's my code- The first url shows my code

My gradle says these two things are the problem, but I don't understand it. Here's what my gradle says:

If rebuilding and cleaning does not fix your problem, you might have an error on any xml file/s, unabling R to renderize. Please check them out — Julián Martínez, Sep 12 '16 at 06:32
down grade your appcompat to compileSdkVersion in build gradle file — Prashant Sharma, Sep 12 '16 at 06:32
maybe you need to import R -- click on R -- do you see an underline saying Import?? in your imports do you have eg (import com.myProject.R;) ?? — Tasos, Sep 12 '16 at 06:33

score 0 · Answer 1 · answered Sep 12 '16 at 06:28

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This happens quite often to me too. I usually end up going File> Invalidate Caches and Restart which fixes it 99% of the time

answered Sep 12 '16 at 06:28

aliaksei

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Frank Odoom · Answer 2 · 2016-09-12T07:19:15.707

In your activity_horizontal_margin you are probably referencing a string from values.xml which doesn't exist, make sure use @+id/.... when this is a new value not declared in values.xml and are instructing the parser (or call it the builder) to create a new entry in R.java, thus you have to include a + sign.,use @id/... when you want to reference an already existing resource in values.xml so parser links this to the already created id in R.java. you can now rebuild your project.

score 0 · Answer 3 · answered Sep 12 '16 at 06:43

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1) Please check buildToolsVersion or downgrade it. 2) make sure your appcompat compile library is included in build.gradle 3) Try to restart Android studio with invalid caches and restart 4) clean/rebuild project and then synch it.

Hope it helps

answered Sep 12 '16 at 06:43

Pratik

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Android Studio Advice

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