Flutter app crashes on start using fire base? - firebase

Question

Started a new flutter project and trying to use firestore.
After following all step to add project to fire base.
Adding all plugins to pubspec.yaml and then running the project.
The log cat shows this:
04-04 14:54:56.061 24084-24084/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.firestoreflutterchat, PID: 24084
java.lang.RuntimeException: Unable to get provider com.google.firebase.provider.FirebaseInitProvider: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.example.firestoreflutterchat-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.firestoreflutterchat-2, /vendor/lib, /system/lib]]
at android.app.ActivityThread.installProvider(ActivityThread.java:4869)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:4461)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4401)
at android.app.ActivityThread.access$1500(ActivityThread.java:139)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1270)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5097)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.example.firestoreflutterchat-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.firestoreflutterchat-2, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
at android.app.ActivityThread.installProvider(ActivityThread.java:4854)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:4461) 
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4401) 
at android.app.ActivityThread.access$1500(ActivityThread.java:139) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1270) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:136) 
at android.app.ActivityThread.main(ActivityThread.java:5097) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:515) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
at dalvik.system.NativeStart.main(Native Method
Before adding cloud firestore plugin the newly project was running after adding this i am having issue.
This is the Pubspec.yaml file :
version: 1.0.0+1
environment:
sdk: ">=2.7.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
cloud_firestore: ^0.13.4+2
permission_handler: ^5.0.0+hotfix.3
firebase_auth: ^0.15.5+3
google_sign_in: ^4.4.0
cupertino_icons: ^0.1.3
dev_dependencies:
flutter_test:
sdk: flutter
flutter:
uses-material-design: true

Answer 1

the problem did not resolve with multidex , only way was to remove it and follow this link
resolve multidex issue
it worked by removing these in your gradle
multiDexEnabled true
and
dependencies {
implementation 'com.android.support:multidex:1.0.3'
}
and changing from this
buildTypes {
release {
signingConfig signingConfigs.release
minifyEnabled true
useProguard true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
to this
buildTypes {
release {
signingConfig signingConfigs.release
minifyEnabled true
useProguard true
}
debug{
minifyEnabled true
useProguard true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
and in your path: /android/app
right click and create a file named proguard-rules.pro
and put these files inside the file
#Flutter Wrapper
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.** { *; }
-keep class io.flutter.util.** { *; }
-keep class io.flutter.view.** { *; }
-keep class io.flutter.** { *; }
-keep class io.flutter.plugins.** { *; }

Answer 2

It seems some setups are still remaining for Firebase.
Checkout this link and set up the .json and .plist file accordingly in project.
If you further still facing the issue,
I would recommend some steps.
1) Delete all the build files of the project, invalid cache and restart android studio.
2) Follow the below changes in your project.
build.gradle file
android {
.....
defaultConfig {
......
multiDexEnabled true//add this line
}
......
dependencies{
compile 'com.android.support:multidex:1.0.1'//add this line
}
AndroidManifest.xml file
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
....
<application
....
android:name="android.support.multidex.MultiDexApplication"
...>
<activity />
...
</application>
</manifest>