title: Material design and Appcompat-v7 not supported in Android?
body: <p>I'm new to Android programming. When I tried to add material design library to
  build.gradle it shows error under implementation 'com.android.support:appcompat-v7:28.0.0'.<br>
  Error message is :</p>
  
  <blockquote>
    <p>Dependencies using groupId <code>com.android.support</code> and <code>androidx.*</code> can not be combined but found <code>IdeMavenCoordinates{myGroupId='com.android.support', myArtifactId='support-fragment', myVersion='28.0.0', myPacking='aar', myClassifier='null'}</code> and <code>IdeMavenCoordinates{myGroupId='androidx.arch.core', myArtifactId='core-runtime', myVersion='2.0.0', myPacking='aar', myClassifier='null'}</code> incompatible dependencies less... (Ctrl+F1) <br>
    Inspection info:There are some combinations of libraries, or tools and libraries, that are incompatible, or can lead to bugs. One such incompatibility is compiling with a version of the Android support libraries that is not the latest version (or in particular, a version lower than your targetSdkVersion).  Issue id: GradleCompatible</p>
  </blockquote>
  
  <p>I don't want to remove appcompat since I want to support lower versions.</p>
  
  <p>here is my gradle code:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  apply plugin: 'kotlin-android'
  
  apply plugin: 'kotlin-android-extensions'
  
  android {
      compileSdkVersion 28
      buildToolsVersion "29.0.0"
      defaultConfig {
          applicationId "com.vignesh.materialdesigntest"
          minSdkVersion 21
          targetSdkVersion 28
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      implementation fileTree(dir: 'libs', include: ['*.jar'])
      implementation "com.google.android.material:material:1.1.0-alpha07"
      implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
      implementation 'com.android.support:appcompat-v7:28.0.0'
      implementation 'com.android.support.constraint:constraint-layout:1.1.3'
      testImplementation 'junit:junit:4.12'
      androidTestImplementation 'com.android.support.test:runner:1.0.2'
      androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
  }
  </code></pre>