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! Gradle refresh failed

I have this gradle issue when i upgrade my android studio, anyone able to help me?

2 Answers2

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Your buildToolVersion should be same as your dependency version

Eg: Open the build.gradle(Module:app)

if your buildToolsVersion '25.0.2', then

compileSdkVersion 25

targetSdkVersion 25

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
 compile 'com.android.support:appcompat-v7:25.0.2'

 compile 'com.android.support:design:25.0.2'

 compile 'com.android.support:cardview-v7:25.0.2'
}

Finally, check your internet connection also.

Priya Rajan
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configure your SDK and update your gradle then rerun your project

Ajay Mistry
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