Java.lang.RuntimeException:Bad URL

I got a problem, when login or register pages. when i click login button or register button it gives me this message.

"java.lang.RuntimeException:Bad URL 10.11.2.37/Android/v1/userLogin.php"

Code :

defaultConfig {
    applicationId "net.simplifiedcoding.androidphpmysql"
    minSdkVersion 19
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

what is the problems & how to fix it?