Develop Reference

Failed to resolve: com.google in Android Studio 3.1.3

Adding Firebase dependencies is giving below error:
Failed to resolve: com.google
This is my app/build.gradle
`
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.xxxxxxx.xxxxx"
minSdkVersion 21
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-alpha3'
implementation 'com.google.firebase: firebase-core: 16.0.0'
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'
}
apply plugin: 'com.google.gms.google-services'
`
I referred to "Failed to resolve: com.google.firebase:firebase-core:9.0.0" but, didn't worked.
Thank you in advance.

Check this line implementation 'com.google.firebase: firebase-core: 16.0.0'
You have a space between com.google.firebase: and firebase-core:16.0.0. Remove those spaces

Failed to resolve: com.google.android.gms:play-services-maps:15.6.1 Install Repository and sync project Show in File Show in Project Structure dialog

apply plugin: 'com.android.application'
android {
compileSdkVersion 27
defaultConfig {
applicationId "com.example.deegi.lab10"
minSdkVersion 15
targetSdkVersion 27
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'])
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.google.android.gms:play-services-maps:15.6.1'
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'
}
this is sync errror : Failed to resolve: com.google.android.gms:play-services-maps:15.6.1
build error: Could not find com.google.android.gms:play-services-maps:15.6.1.
Searched in the following locations:
my emulator play services version is : 11.3.02

It happens because com.google.android.gms:play-services-maps:15.6.1 doesn't exist.
Use:
com.google.android.gms:play-services-maps:15.0.1

Updating to couchbase lite 2.0.0 causing cannot resolve symbol errors

I am trying to update from couchbase.lite 1.4.0 to 2.0.0, but when I update and sync my build.gradle file I seem keep getting 'cannot resolve symbol' errors for my imports (AndroidContext, Document, and Database). After looking at the dcoumentation, it appears that all I have change change is:
implementation 'com.couchbase.lite:couchbase-lite-android:1.4.0'
to
implementation 'com.couchbase.lite:couchbase-lite-android:2.0.0'
unless I missed something else...
Here is my complete build.grade file.
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
defaultConfig {
applicationId "com.my.app"
minSdkVersion 19
targetSdkVersion 26
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-v7:26.1.0'
implementation 'com.android.support:design:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
implementation 'com.couchbase.lite:couchbase-lite-android:2.0.0'
implementation 'com.couchbase.lite:couchbase-lite-android-forestdb:1.4.1'
}

Can't start a new project because of gradle error

I created a new project as usual andafter the gradle running I get this error:
`Error:Execution failed for task ':app:preDebugAndroidTestBuild'.
Conflict with dependency 'com.android.support:support-annotations' in project ':app'. Resolved versions for app (26.1.0) and test app (27.1.1) differ. See https://d.android.com/r/tools/test-apk-dependency-conflicts.html for details.`
This is my fresh project gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
defaultConfig {
applicationId "com.example.elili.deltacalculator"
minSdkVersion 18
targetSdkVersion 26
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-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.0'
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'
I have zero ideas on how to fix it...

If you are not going to implement testing code, then remove junit from your app. You can replace your gradle by below.
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
defaultConfig {
applicationId "com.example.elili.deltacalculator"
minSdkVersion 18
targetSdkVersion 26
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.0'

You need to try the annotation library using:
androidTestCompile 'com.android.support:support-annotations:26.1.0'
First way, It use like this:
Force to use support annotations in the test app, so it is internally used by the runner module.
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
compile 'com.android.support:support-v4:26.1.0'
compile 'com.android.support:appcompat-v7:26.1.0'
.
.
.
.
androidTestCompile 'com.android.support:support-annotations:26.1.0'
}
Second way is to use this as:
configurations.all {
resolutionStrategy.force 'com.android.support:support-annotations:26.1.0'
}

Error=> Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'

I have a problem when I execute my android app in Android Studio it shows error as mention below. How can I fix this problem?
Error:Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'. Could not create service of type AnnotationProcessorDetector using JavaGradleScopeServices.createAnnotationProcessorDetector().
build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
defaultConfig {
applicationId "com.example.toshiba.bluetooth_deneme"
minSdkVersion 15
targetSdkVersion 26
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-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
compile 'com.android.support:support-annotations:27.0.2'
}

I was running into a similar issue and it just turned out my project needed to be re-synced. Clicking the button below fixed it for me. (I can't say why that happens though.)