FirebaseDatabase.getIntance() 抛出空指针异常:Firebase 数据库组件不存在

Question

FirebaseDatabase firebaseDatabase = FirebaseDatabase.getInstance(); 正在抛出 NullPointerException：Firebase 组件不存在。

已尝试更新不同版本的 Firebase 数据库库

Caused by: java.lang.NullPointerException: Firebase Database component is not present.
        at com.google.android.gms.common.internal.Preconditions.checkNotNull(Unknown Source:11)
        at com.google.firebase.database.FirebaseDatabase.getInstance(com.google.firebase:firebase-database@@17.0.0:120)
        at com.google.firebase.database.FirebaseDatabase.getInstance(com.google.firebase:firebase-database@@17.0.0:60)
        at com.vkeel.Dependencies.init(Dependencies.java:52)
        at com.vkeel.BaseActivity.onCreate(BaseActivity.java:15)
        at com.vkeel.ui.login.LoginActivity.onCreate(LoginActivity.java:59)
        at android.app.Activity.performCreate(Activity.java:7009)
        at android.app.Activity.performCreate(Activity.java:7000)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)

Answer 1

尝试使用最新的 gradle 工具和谷歌服务

dependencies {
        classpath 'com.android.tools.build:gradle:3.4.1'
        classpath 'com.google.gms:google-services:4.2.0'
}