android - NotificationCompat.Builder doesn't accept 2nd argument

Question

For some reason my NotificationCompat.Builder 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:

if (Build.VERSION.SDK_INT >= 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();
        }

and these are my gradle files

build.gradle:project

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
}

build.gradle:app

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'
    }

Any ideas?

Answer 1

Please make sure that you are including the correct version of the NotificationCompat library: import android.support.v4.app.NotificationCompat;. Here is the official guide on Notification Channels, which are a new feature as of Android O: https://developer.android.com/training/notify-user/channels.