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我正在检查android的firebase消息传递功能,并检查了一个关于它的示例项目.当我编写代码时,我的应用程序可以导入通知管理器,但无法导入通知通道.我的gradle文件可以在下面找到.

import android.app.NotificationChannel;
import android.app.NotificationManager;

我的gradle依赖

  compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.android.support:support-compat:25.0.0-beta2'
    compile 'com.android.support:design:25.3.1'
   compile 'com.android.support:support-v4:25.3.1'
    compile 'com.android.support:support-v13:25.3.1'
 compile 'com.google.android.gms:play-services:11.0.2'
    compile 'com.google.firebase:firebase-messaging:11.0.2'
    compile 'com.google.firebase:firebase-core:11.0.2

谷歌项目的依赖性.

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:26.0.0-beta2'
    compile 'com.android.support:animated-vector-drawable:26.0.0-beta2'
    compile 'com.android.support:support-compat:26.0.0-beta2'

    compile 'com.google.firebase:firebase-messaging:11.0.1'
    compile 'com.firebase:firebase-jobdispatcher:0.6.0'

    // Testing dependencies
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2'
    androidTestCompile 'com.android.support.test:runner:0.5'
    androidTestCompile 'com.android.support:support-annotations:25.3.1'
}

链接到谷歌的代码:https://github.com/firebase/quickstart-android/blob/master/messaging/app/build.gradle '

编辑:所有gradle文件.

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion '25.0.3'
    defaultConfig {
        applicationId 'com.myapp.extranet'
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        vectorDrawables.useSupportLibrary = true …