A probleme with the gardle : > I used this tutorial https://developers.google.com/maps/documentation/android-api/start 
> This is my gardle : 

    apply plugin: 'com.android.application'
    
    android {
        compileSdkVersion 23
        buildToolsVersion "23.0.3"
    
        defaultConfig {
            applicationId "com.example.amine.myapplicationmapamine"
            minSdkVersion 15
            targetSdkVersion 23
            versionCode 1
            versionName "1.0"
        }
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            }
        }
    }
    
    dependencies {
        compile fileTree(dir: 'libs', include: ['*.jar'])
        testCompile 'junit:junit:4.12'
        compile 'com.android.support:appcompat-v7:23.3.0'
        compile 'com.google.android.gms:play-services:9.8.00'
    }

> Error : Error:Execution failed for task
> ':app:transformClassesWithDexForDebug'.
> com.android.build.api.transform.TransformException:
> com.android.ide.common.process.ProcessException:
> org.gradle.process.internal.ExecException: Process 'command
> 'C:\Program Files\Java\jdk1.7.0_79\bin\java.exe'' finished with
> non-zero exit value 2