我刚开始使用火力地堡认证,我跟着一些教程,包括火力地堡的文档,但无论我做什么,FirebaseAuth.getInstance()始终返回null。想了很久之后,我决定删除我所做的一切相关的认证,并开始过来,让我只用FirebaseAuth变量的声明和初始化,如下所示:在类变量初始化:
private FirebaseAuth mAuth;
然后在onCreate()方法我叫其初始化火力的变量和引用的方法,所以我把下面的方法:
private void initFirebase() //initialize firebase
{
FirebaseApp.initializeApp(this);
mAuth = FirebaseAuth.getInstance();
mFirebaseDatabase=FirebaseDatabase.getInstance();
mDatabaseReference=mFirebaseDatabase.getReference().child("users");
mEventsReference=mFirebaseDatabase.getReference().child("events");
mStorageRef= FirebaseStorage.getInstance().getReference();
defaultRef = mStorageRef.child("usersProfilePic/"); //Assigning default reference for storage
}
我在的build.gradle依赖关系是:
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
/*dataBinding {
enabled = true;
}*/
defaultConfig {
applicationId "com.example.android.aln4"
minSdkVersion 16
targetSdkVersion 28
versionCode 1
multiDexEnabled true
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
compileOptions {
targetCompatibility 1.8
sourceCompatibility 1.8
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
//noinspection GradleCompatible
testImplementation 'junit:junit:4.12'
//google maps api
implementation 'com.google.android.gms:play-services-maps:16.0.0'
implementation 'com.google.android.gms:play-services-location:16.0.0'
implementation 'com.google.android.gms:play-services-places:16.0.0'
//Firebase
implementation 'com.google.firebase:firebase-crash:16.2.1'
implementation 'com.firebase:firebase-client-android:2.5.2'
implementation 'com.google.firebase:firebase-core:16.0.6'
implementation 'com.google.firebase:firebase-database:16.0.6'
implementation 'com.firebase:firebase-client-android:2.5.2'
implementation 'com.firebaseui:firebase-ui-database:2.1.1'
implementation 'com.google.firebase:firebase-storage:16.0.5'
implementation 'com.google.firebase:firebase-firestore:18.0.0'
implementation 'com.google.firebase:firebase-messaging:17.3.4'
implementation 'com.google.firebase:firebase-auth:16.1.0'
implementation 'com.google.android.gms:play-services-auth:16.0.1'
//Calendar
implementation 'com.github.alamkanak:android-week-view:1.2.6'
implementation 'com.github.sundeepk:compact-calendar-view:3.0.0'
implementation 'com.github.khacpv:Calendar-Day-View:1.0.5'
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support:design:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:support-v4:28.0.0'
implementation 'com.android.support:multidex:1.0.3'
implementation 'com.android.support:cardview-v7:28.0.0'
implementation 'com.android.support:recyclerview-v7:28.0.0'
//Image tools
implementation 'com.theartofdev.edmodo:android-image-cropper:2.7.0'
implementation 'com.squareup.picasso:picasso:2.5.2'
implementation 'de.hdodenhof:circleimageview:2.1.0'
//Validation
implementation 'com.basgeekball:awesome-validation:2.0'
//Notification badge
implementation 'com.nex3z:notification-badge:0.1.0'
//Others
implementation 'com.kevin:loopview:1.4.1'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}
apply plugin: 'com.google.gms.google-services'
com.google.gms.googleservices.GoogleServicesPlugin.config.disableVersionCheck = true
在火力地堡认证网站本身,我已经启用的登录方法的认证服务。
所以,如果有人能告诉我这里有什么问题,我很乐意,因为我已经花了近6小时试图弄明白...
的getInstance()是用于检查是否用户已登录与否。空意味着你还没有登录。
在documentation至少告诉,FirebaseApp.initializeApp(this);
返回什么:
默认
FirebaseApp
,如果任一先前已初始化,或者火力地堡API密钥存在于字符串资源。否则返回null
。
确保在build.gradle
底部应用谷歌服务的插件,在android
块之后......因为这是那些API keys in string resources
发源于。
这是FirebaseAuth.getInstance()
返回null
唯一合乎逻辑的解释。
这一次加两次:com.firebase:firebase-client-android:2.5.2
。
该版本不匹配可以通过排除来解决:
implementation ("com.firebaseui:firebase-ui-database:2.1.1") {
exclude group: "com.android.support", module: "recyclerview-v7"
}
因此,它将改用com.android.support:recyclerview-v7:28.0.0
。