Sdk: minSdkVersion 15 cannot differ from the L version declared in the library

When creating an application

Error: Execution completed for task ': app: processDebugManifest'.

Failed to execute merge manifest: uses-sdk: minSdkVersion 15 cannot differ from L version declared in library C: \ Users \ Sybren-PC \ AndroidStudioProjects \ Tutorial \ app \ build \ intermediates \ exploded-aar \ com.android.support \ AppCompat-v7 \ 21.0.0-rc1 \ AndroidManifest.xml

I've tried some things in build.gradle

, but nothing seems to work.

The error message points to this file

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
 Copyright (C) 2012 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="android.support.v7.appcompat" >

    <uses-sdk
        android:minSdkVersion="L"
        android:targetSdkVersion="L" />

    <application />

</manifest>

      

        
        
        
      

    

AndroidManifest.xml (from my project)

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.sybren_pc.tutorial" >

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

      

        
        
        
      

    

Build.gradle (module: app)

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "20.0.0"

    defaultConfig {
        applicationId "com.example.sybren_pc.tutorial"
        minSdkVersion 15
        targetSdkVersion 21
        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-v7:21.+'

}

      

        
        
        
      

    

Who can help fix this?

EDIT

This is what my build.gradle looks like. Now the gradle build is fine.

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "com.example.sybren_pc.tutorial"
        minSdkVersion 15
        targetSdkVersion 21
        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-v7:21.0.0'

      

        
        
        
      

    

Updates I made from SDK Manager: Android SDK Build Tools, Android Support Repository, Android Support Support