I have a problem in my build.gradle file, the compileSdkVersion and buildToolsVersion doesn't match.
Here is my build.gradle:
    apply plugin: 'com.android.application'
    android {
    compileSdkVersion 22
    buildToolsVersion '23.0.2'
    defaultConfig {
        applicationId "com.emergencyapp"
        minSdkVersion 18
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    dexOptions {
        preDexLibraries = false
    }
    }
    dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.2.1'
    compile 'com.android.support:design:22.2.1'
    compile 'com.jakewharton:butterknife:6.1.0'
    compile 'com.google.android.gms:play-services:8.4.0'
    }
And here is my error:
I think it is the buildToolsVersion and the dependencies are causing the problem.

 
     
     
     
     
    