我创建了一个新项目,并通过firebase的android studio工具添加了firebase。按照说明进行了所有操作,但我在使用应用程序午餐时收到此错误。
Process: com.chitchat, PID: 20084
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.chitchat/com.chitchat.MainActivity}: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.chitchat. Make sure to call FirebaseApp.initializeApp(Context) first.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2951)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3086)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6718)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:495)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.chitchat. Make sure to call FirebaseApp.initializeApp(Context) first.
at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common@@16.0.1:219)
at com.google.firebase.auth.FirebaseAuth.getInstance(Unknown Source:1)
at com.chitchat.MainActivity.onCreate(MainActivity.java:22)
at android.app.Activity.performCreate(Activity.java:7144)
at android.app.Activity.performCreate(Activity.java:7135)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1272)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2931)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3086)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6718)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:495)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
MainActivity.java 是
public class MainActivity extends AppCompatActivity {
private FirebaseAuth mAuth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FirebaseApp.initializeApp(MainActivity.this);
mAuth = FirebaseAuth.getInstance();
}
@Override
public void onStart() {
super.onStart();
// Check if user is signed in (non-null) and update UI accordingly.
FirebaseUser currentUser = mAuth.getCurrentUser();
//updateUI(currentUser);
if(currentUser == null){
Intent startAct = new Intent(MainActivity.this, Start_Activity.class);
startActivity(startAct);
finish();
}
}
}
而 gradle.build 是
apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.chitchat"
minSdkVersion 23
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
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.google.firebase:firebase-auth:16.0.3'
implementation 'com.google.firebase:firebase-core:16.0.3'
//implementation 'com.google.android.gms:play-services-base'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}
项目级gradle.build
buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.3.0'
classpath 'com.google.gms:google-services:4.1.0'
// 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
}
在网络上找不到任何内容!添加了 firebaseApp.initializeApp(this)
,该错误未出现在任何说明中,但在模拟器和设备上仍然出现相同的错误。
最佳答案
我也遇到了这个问题。最近几周我看到很多人都遇到了这个问题。有问题
classpath 'com.android.tools.build:gradle:3.3.0'
更改为
classpath 'com.android.tools.build:gradle:3.2.0'
如上所述here !
因为根据此讨论,AGP 存在一些问题 here ! 我认为这会解决您的问题。
编辑:自 2021 年 1 月 30 日起,只需更改为所有 Firebase 类依赖项的最新版本,它就应该可以工作:classpath 'com.google.gms:google-services:4.3.4'
关于java.lang.IllegalStateException : Default FirebaseApp is not initialized in this process,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54324713/