Android Studio doesn't read Samsung Galaxy S5

Question

I installed all the latest SDK tools Android SDK Tools 24.3.3 and Android SDK Platform-tools 22,and unfortunaly android studio doesn't like my Samsung S5 Galaxy. It reads it as offline. You can see the picture.

I tried the adb commands kill-server and start-server but with no result. I also turned off and on the USB Debugging from the Developer Options..

This is my gradle file code just in case I did something wrong there. I have another device connected to my mac which is recongised and is online.

apply plugin: 'com.android.application'

android {
compileSdkVersion 22
buildToolsVersion "21.1.2"

defaultConfig {
    applicationId "app.victory.walking.thewalkingviktory"
    minSdkVersion 15
    targetSdkVersion 22
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'),    '
 'proguard-rules.pro'
    }
 }
}

 dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])

compile 'com.android.support:appcompat-v7:22.1.1'
compile 'com.mcxiaoke.volley:library:1.0.15'
compile 'com.ganyo:gcm-server:1.0.2'
compile 'com.google.android.gms:play-services:7.5.0'

}

What could be wrong?

Answer 1

只需关闭手机，等待几秒钟，然后再次打开，然后再连接即可。

Answer 2

Install Samsung Kies then see if it is detecting or not.

See if debugging option is on or not in your phone.