Android Studio and android.support.v4.app.Fragment: cannot resolve symbol

Question

I am tryng out Android Studio instead of Eclipse. I install it and then start a completely new project and follow the wizard. I add no code of my own.

Then, I right-

Answer 1

DID NOT WORK:

I have already had the following dependency in my build.gradle

implementation 'com.android.support:support-v13:26.0.2'

I have tried all of the following,

• Invalidate Caches/Restart
• Sync project with gradle files
• Clean project
• Rebuild project
• gradlew clean

But, none of them worked for me.

SOLUTION:

Finally, I solved it by deleting "/.idea/libraries", and then synced with gradle and built again.

Answer 2

Try this may will help you.Go to "File" -> "Invalidate Caches...", and select "Invalidate and Restart" option to fix this.

Answer 3

Android studio has option to manage dependencies. Follow path.

1. Click on File, then select Project Structure
2. Choose Modules "app"
3. Click "Dependencies" tab
4. Click on the + sign, choose Library Dependencies
5. Select support-v4 or other libraries as needed and click OK

FYI check link stackoverflow.com/a/33414287/1280397

Answer 4

Hrrm... I dont know how many times this has happend so far: I test, try, google, test again and mess around for hours, and when I finally give up, I go to my trusted Stackoverflow and write a detailed and clear question.

When I post the question, switch over to the IDE and boom - error gone.

I can't say why its gone, because I change absolutely nothing in the code except for that I already tried as stated above. But all of a sudden, the compile error is gone!

In the build.gradle, it now says:

dependencies {
    compile "com.android.support:appcompat-v7:18.0.+"
}

which initially did not work, the compile errors did not go away. it took like 30 min before the IDE got it, it seems... hmm...

=== EDIT === When I view the build.gradle again, it has now changed and looks like this:

dependencies {
    compile 'com.android.support:support-v4:18.0.0'
    compile "com.android.support:appcompat-v7:18.0.+"
}

Im not really sure what the appcompat is right now.

Answer 5

I was facing the same issue. As it turns out in my build.gradle file there was this :

configurations {
    all*.exclude group: 'com.android.support'
}

Removing that fixed my issue. So guys, if doing all that and still your issue is not fixed, look for any exclude keywords in your gradle file.

Answer 6

replace this line of code

import android.support.v4.app.FragmentActivity;

with

import androidx.fragment.app.FragmentActivity;

and you are done.