I can't initialize the firebaseFirebaseUI database and authNull Pointer Error in catching data from intentFATAL EXCEPTION: main KotlinNullPointerExceptionButton related issue:Attempt to invoke virtual method on a null object referenceExtending BaseActivity showing null pointer on super.oncreateandroid Oreo Crash error`getResources().getString` generating exceptiongetting error from recylerview when we try to set adapter in recylerviewMy app to know if a file exist in a URL keeps stopingI am trying to connect my Android project to Firebase, real-time database but it always failed. Plase help me find what mistake is

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I can't initialize the firebase


FirebaseUI database and authNull Pointer Error in catching data from intentFATAL EXCEPTION: main KotlinNullPointerExceptionButton related issue:Attempt to invoke virtual method on a null object referenceExtending BaseActivity showing null pointer on super.oncreateandroid Oreo Crash error`getResources().getString` generating exceptiongetting error from recylerview when we try to set adapter in recylerviewMy app to know if a file exist in a URL keeps stopingI am trying to connect my Android project to Firebase, real-time database but it always failed. Plase help me find what mistake is






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;








0















I need to connect to firebase, I did exactly what the firebase documentation told me that why I must've connected to firebase. I put the apply plugin as well, I saw the firebase console and I did every step I needed to do. that my code...



 FirebaseApp.initializeApp(this);

FirebaseDatabase database = FirebaseDatabase.getInstance();

DatabaseReference myRef= database.getReference();

myRef.setValue("teste");


that is my build.code(module)



apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
android
compileSdkVersion 28
defaultConfig
applicationId "projeto.ufma.com.projeto"
minSdkVersion 15
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

buildTypes
release
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'




dependencies
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0-rc01'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
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'
implementation 'com.google.firebase:firebase-core:16.0.4'
implementation 'com.google.firebase:firebase-database:16.0.5'





But always I'm getting that error:



E/AndroidRuntime: FATAL EXCEPTION: main
Process: projeto.ufma.com.projeto, PID: 28861
java.lang.RuntimeException: Unable to start activity ComponentInfoprojeto.ufma.com.projeto/projeto.ufma.com.projeto.MainActivity: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process projeto.ufma.com.projeto. Make sure to call FirebaseApp.initializeApp(Context) first.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2957)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process projeto.ufma.com.projeto. Make sure to call FirebaseApp.initializeApp(Context) first.
at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common@@16.0.4:240)
at com.google.firebase.database.FirebaseDatabase.getInstance(com.google.firebase:firebase-database@@16.0.5:67)
at projeto.ufma.com.projeto.MainActivity.onCreate(MainActivity.java:60)
at android.app.Activity.performCreate(Activity.java:7183)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1220)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2910)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032) 
at android.app.ActivityThread.-wrap11(Unknown Source:0) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696) 
at android.os.Handler.dispatchMessage(Handler.java:105) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6944) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374) 


The point is I followed the firebase documentation and I did everything there told me to do, though I can't connect to firebase.



I was trying to test the connection, but I just can...










share|improve this question
























  • Java has nothing to do with JavaScript.

    – Zoe
    Mar 24 at 15:31

















0















I need to connect to firebase, I did exactly what the firebase documentation told me that why I must've connected to firebase. I put the apply plugin as well, I saw the firebase console and I did every step I needed to do. that my code...



 FirebaseApp.initializeApp(this);

FirebaseDatabase database = FirebaseDatabase.getInstance();

DatabaseReference myRef= database.getReference();

myRef.setValue("teste");


that is my build.code(module)



apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
android
compileSdkVersion 28
defaultConfig
applicationId "projeto.ufma.com.projeto"
minSdkVersion 15
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

buildTypes
release
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'




dependencies
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0-rc01'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
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'
implementation 'com.google.firebase:firebase-core:16.0.4'
implementation 'com.google.firebase:firebase-database:16.0.5'





But always I'm getting that error:



E/AndroidRuntime: FATAL EXCEPTION: main
Process: projeto.ufma.com.projeto, PID: 28861
java.lang.RuntimeException: Unable to start activity ComponentInfoprojeto.ufma.com.projeto/projeto.ufma.com.projeto.MainActivity: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process projeto.ufma.com.projeto. Make sure to call FirebaseApp.initializeApp(Context) first.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2957)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process projeto.ufma.com.projeto. Make sure to call FirebaseApp.initializeApp(Context) first.
at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common@@16.0.4:240)
at com.google.firebase.database.FirebaseDatabase.getInstance(com.google.firebase:firebase-database@@16.0.5:67)
at projeto.ufma.com.projeto.MainActivity.onCreate(MainActivity.java:60)
at android.app.Activity.performCreate(Activity.java:7183)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1220)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2910)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032) 
at android.app.ActivityThread.-wrap11(Unknown Source:0) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696) 
at android.os.Handler.dispatchMessage(Handler.java:105) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6944) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374) 


The point is I followed the firebase documentation and I did everything there told me to do, though I can't connect to firebase.



I was trying to test the connection, but I just can...










share|improve this question
























  • Java has nothing to do with JavaScript.

    – Zoe
    Mar 24 at 15:31













0












0








0








I need to connect to firebase, I did exactly what the firebase documentation told me that why I must've connected to firebase. I put the apply plugin as well, I saw the firebase console and I did every step I needed to do. that my code...



 FirebaseApp.initializeApp(this);

FirebaseDatabase database = FirebaseDatabase.getInstance();

DatabaseReference myRef= database.getReference();

myRef.setValue("teste");


that is my build.code(module)



apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
android
compileSdkVersion 28
defaultConfig
applicationId "projeto.ufma.com.projeto"
minSdkVersion 15
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

buildTypes
release
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'




dependencies
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0-rc01'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
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'
implementation 'com.google.firebase:firebase-core:16.0.4'
implementation 'com.google.firebase:firebase-database:16.0.5'





But always I'm getting that error:



E/AndroidRuntime: FATAL EXCEPTION: main
Process: projeto.ufma.com.projeto, PID: 28861
java.lang.RuntimeException: Unable to start activity ComponentInfoprojeto.ufma.com.projeto/projeto.ufma.com.projeto.MainActivity: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process projeto.ufma.com.projeto. Make sure to call FirebaseApp.initializeApp(Context) first.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2957)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process projeto.ufma.com.projeto. Make sure to call FirebaseApp.initializeApp(Context) first.
at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common@@16.0.4:240)
at com.google.firebase.database.FirebaseDatabase.getInstance(com.google.firebase:firebase-database@@16.0.5:67)
at projeto.ufma.com.projeto.MainActivity.onCreate(MainActivity.java:60)
at android.app.Activity.performCreate(Activity.java:7183)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1220)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2910)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032) 
at android.app.ActivityThread.-wrap11(Unknown Source:0) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696) 
at android.os.Handler.dispatchMessage(Handler.java:105) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6944) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374) 


The point is I followed the firebase documentation and I did everything there told me to do, though I can't connect to firebase.



I was trying to test the connection, but I just can...










share|improve this question
















I need to connect to firebase, I did exactly what the firebase documentation told me that why I must've connected to firebase. I put the apply plugin as well, I saw the firebase console and I did every step I needed to do. that my code...



 FirebaseApp.initializeApp(this);

FirebaseDatabase database = FirebaseDatabase.getInstance();

DatabaseReference myRef= database.getReference();

myRef.setValue("teste");


that is my build.code(module)



apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
android
compileSdkVersion 28
defaultConfig
applicationId "projeto.ufma.com.projeto"
minSdkVersion 15
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

buildTypes
release
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'




dependencies
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0-rc01'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
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'
implementation 'com.google.firebase:firebase-core:16.0.4'
implementation 'com.google.firebase:firebase-database:16.0.5'





But always I'm getting that error:



E/AndroidRuntime: FATAL EXCEPTION: main
Process: projeto.ufma.com.projeto, PID: 28861
java.lang.RuntimeException: Unable to start activity ComponentInfoprojeto.ufma.com.projeto/projeto.ufma.com.projeto.MainActivity: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process projeto.ufma.com.projeto. Make sure to call FirebaseApp.initializeApp(Context) first.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2957)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process projeto.ufma.com.projeto. Make sure to call FirebaseApp.initializeApp(Context) first.
at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common@@16.0.4:240)
at com.google.firebase.database.FirebaseDatabase.getInstance(com.google.firebase:firebase-database@@16.0.5:67)
at projeto.ufma.com.projeto.MainActivity.onCreate(MainActivity.java:60)
at android.app.Activity.performCreate(Activity.java:7183)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1220)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2910)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032) 
at android.app.ActivityThread.-wrap11(Unknown Source:0) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696) 
at android.os.Handler.dispatchMessage(Handler.java:105) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6944) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374) 


The point is I followed the firebase documentation and I did everything there told me to do, though I can't connect to firebase.



I was trying to test the connection, but I just can...







android firebase firebase-realtime-database






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 24 at 15:31









Zoe

15.1k85789




15.1k85789










asked Mar 24 at 15:26









GuilhermeGuilherme

218




218












  • Java has nothing to do with JavaScript.

    – Zoe
    Mar 24 at 15:31

















  • Java has nothing to do with JavaScript.

    – Zoe
    Mar 24 at 15:31
















Java has nothing to do with JavaScript.

– Zoe
Mar 24 at 15:31





Java has nothing to do with JavaScript.

– Zoe
Mar 24 at 15:31












1 Answer
1






active

oldest

votes


















2














Under Gradle Scripts - > build.gradle(Project:YourProjectName) in that file
use latest classpath of play services
buildscript - > dependencies - >



dependencies 
classpath 'com.google.gms:google-services:4.2.0'






share|improve this answer

























  • I also did it before...

    – Guilherme
    Mar 24 at 16:11











  • did it work? my application crashed having same error, i updated google-services: from 4.0.0 to 4.2.0 and it worked

    – Praveen GM
    Mar 24 at 16:13












  • it worked... gosh thanks. After I changed to 4.2.0 I needed put another google-services.json. And It worked, thanks

    – Guilherme
    Mar 24 at 16:23











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









2














Under Gradle Scripts - > build.gradle(Project:YourProjectName) in that file
use latest classpath of play services
buildscript - > dependencies - >



dependencies 
classpath 'com.google.gms:google-services:4.2.0'






share|improve this answer

























  • I also did it before...

    – Guilherme
    Mar 24 at 16:11











  • did it work? my application crashed having same error, i updated google-services: from 4.0.0 to 4.2.0 and it worked

    – Praveen GM
    Mar 24 at 16:13












  • it worked... gosh thanks. After I changed to 4.2.0 I needed put another google-services.json. And It worked, thanks

    – Guilherme
    Mar 24 at 16:23















2














Under Gradle Scripts - > build.gradle(Project:YourProjectName) in that file
use latest classpath of play services
buildscript - > dependencies - >



dependencies 
classpath 'com.google.gms:google-services:4.2.0'






share|improve this answer

























  • I also did it before...

    – Guilherme
    Mar 24 at 16:11











  • did it work? my application crashed having same error, i updated google-services: from 4.0.0 to 4.2.0 and it worked

    – Praveen GM
    Mar 24 at 16:13












  • it worked... gosh thanks. After I changed to 4.2.0 I needed put another google-services.json. And It worked, thanks

    – Guilherme
    Mar 24 at 16:23













2












2








2







Under Gradle Scripts - > build.gradle(Project:YourProjectName) in that file
use latest classpath of play services
buildscript - > dependencies - >



dependencies 
classpath 'com.google.gms:google-services:4.2.0'






share|improve this answer















Under Gradle Scripts - > build.gradle(Project:YourProjectName) in that file
use latest classpath of play services
buildscript - > dependencies - >



dependencies 
classpath 'com.google.gms:google-services:4.2.0'







share|improve this answer














share|improve this answer



share|improve this answer








edited Mar 24 at 15:59









Zoe

15.1k85789




15.1k85789










answered Mar 24 at 15:58









Praveen GMPraveen GM

221211




221211












  • I also did it before...

    – Guilherme
    Mar 24 at 16:11











  • did it work? my application crashed having same error, i updated google-services: from 4.0.0 to 4.2.0 and it worked

    – Praveen GM
    Mar 24 at 16:13












  • it worked... gosh thanks. After I changed to 4.2.0 I needed put another google-services.json. And It worked, thanks

    – Guilherme
    Mar 24 at 16:23

















  • I also did it before...

    – Guilherme
    Mar 24 at 16:11











  • did it work? my application crashed having same error, i updated google-services: from 4.0.0 to 4.2.0 and it worked

    – Praveen GM
    Mar 24 at 16:13












  • it worked... gosh thanks. After I changed to 4.2.0 I needed put another google-services.json. And It worked, thanks

    – Guilherme
    Mar 24 at 16:23
















I also did it before...

– Guilherme
Mar 24 at 16:11





I also did it before...

– Guilherme
Mar 24 at 16:11













did it work? my application crashed having same error, i updated google-services: from 4.0.0 to 4.2.0 and it worked

– Praveen GM
Mar 24 at 16:13






did it work? my application crashed having same error, i updated google-services: from 4.0.0 to 4.2.0 and it worked

– Praveen GM
Mar 24 at 16:13














it worked... gosh thanks. After I changed to 4.2.0 I needed put another google-services.json. And It worked, thanks

– Guilherme
Mar 24 at 16:23





it worked... gosh thanks. After I changed to 4.2.0 I needed put another google-services.json. And It worked, thanks

– Guilherme
Mar 24 at 16:23

















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