title: NotificationCompat.Builder doesn't accept 2nd argument
body: <p>For some reason my <code>NotificationCompat.Builder</code> will not accept 2nd argument and I have no idea how to fix it. I saw some other answers but mostly the problem was in the gradle version, but mine is up-to-date as shown below:</p>
  
  <pre><code>if (Build.VERSION.SDK_INT &gt;= 26) {
          Intent notificationIntent = new Intent(this, MainActivity.class);
          PendingIntent mPendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
  
          Notification mNotification = new NotificationCompat.Builder(this, CHANNEL_ID)
                  .setContentTitle("Content Title")
                  .setContentText("Content Text")
                  .setSmallIcon(R.drawable.ic_check)
                  .setContentIntent(mPendingIntent)
                  .build();
  
              startForeground(1, mNotification);
              mNotification.notify();
          }
  </code></pre>
  
  <p>and these are my gradle files</p>
  
  <p>build.gradle:project</p>
  
  <pre><code>buildscript {
      repositories {
          google()
          jcenter()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:3.1.2'
          // NOTE: Do not place your application dependencies here; they belong
          // in the individual module build.gradle files
      }
  }
  
  allprojects {
      repositories {
          google()
          jcenter()
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  </code></pre>
  
  <p>build.gradle:app</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
      android {
          compileSdkVersion 26
          defaultConfig {
              applicationId "rs.dreamlight.parkomat"
              minSdkVersion 15
              targetSdkVersion 26
              versionCode 1
              versionName "1.0"
              testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
              vectorDrawables.useSupportLibrary = true
          }
          buildTypes {
              release {
                  minifyEnabled false
                  proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
              }
          }
      }
  
  
      dependencies {
          implementation fileTree(dir: 'libs', include: ['*.jar'])
          implementation 'com.android.support:appcompat-v7:26.1.0'
          implementation 'com.android.support:support-v4:26.1.0'
          implementation 'com.android.support.constraint:constraint-layout:1.0.2'
          implementation 'com.android.support:support-vector-drawable:26.1.0'
          implementation 'com.google.code.gson:gson:2.8.4'
          testImplementation 'junit:junit:4.12'
          androidTestImplementation 'com.android.support.test:runner:1.0.1'
          androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
          implementation 'com.android.support:design:26.1.0'
          implementation 'com.android.support:cardview-v7:26.1.0'
          implementation 'com.github.clans:fab:1.6.4'
      }
  </code></pre>
  
  <p>Any ideas?</p>