Error:Could not find com.android.tools.build:gradle:2.1.0-alpha1
<p>I update my android studio and restart it, it works properly but when i try to imoprt my previous project it shows error somthing like that:</p>

<p>here is the snapshot of error...</p>

<p><a href="http://i.stack.imgur.com/AynD4.png" rel="nofollow">Error during import the project</a></p>

<p>and here is my gradle file...</p>

<pre><code>// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.0-alpha1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}
</code></pre>