Builder中的Builder(Context)不能应用于(Context, java.lang.String)

大家好，我正在通知，在课堂上NotificationUtils我收到这样的错误。

Builder (Context) in Builder cannot be applied to (Context, java.lang.String)

错误线

final NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mContext, CHANNEL_ID);

通道 - private static final String CHANNEL_ID = "myChannel";

它是什么，我该如何修复它？在另一个项目中，它工作正常。如果您删除CHANNEL_ID，通知会到达，但活动不会打开，通知文本应写入其中。

进口

  import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.support.v4.app.NotificationCompat;
import android.text.Html;

import com.whrsmxmx.vk_api_test.MapsActivity;
import com.whrsmxmx.vk_api_test.PushTest;
import com.whrsmxmx.vk_api_test.R;
import com.whrsmxmx.vk_api_test.vo.NotificationVO;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

构建.gradle

implementation 'com.android.support:appcompat-v7:23.0.0'
    implementation 'com.google.android.gms:play-services-maps:9.4.0'
    implementation 'com.google.android.gms:play-services:9.4.0'
    implementation 'com.android.support:multidex:1.0.0'
    testImplementation 'junit:junit:4.12'
    implementation 'com.google.firebase:firebase-core:9.4.0'
    implementation 'com.getbase:floatingactionbutton:1.10.1'
    implementation 'com.google.firebase:firebase-database:9.4.0'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    compile 'com.android.support.constraint:constraint-layout:1.0.0-beta4'
    compile 'com.vk:androidsdk:1.6.5'
    compile 'com.squareup.picasso:picasso:2.5.2'
    testCompile 'junit:junit:4.12'
    implementation 'com.crashlytics.sdk.android:crashlytics:2.9.9'
    //Новый хлам от уведомлений и т.д
    implementation 'com.loopj.android:android-async-http:1.4.9'
    implementation 'com.squareup.retrofit2:retrofit:2.2.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.2.0'
    implementation 'com.squareup.okhttp3:logging-interceptor:3.6.0'
    implementation 'com.google.code.gson:gson:2.8.1'
    implementation 'com.google.firebase:firebase-messaging:9.4.0'
    implementation 'com.squareup.picasso:picasso:2.71828'