Develop Reference

React Native 'run-android' mac issue

I have a react-native project that successfully runs on iOS emulator however, when running react-native run-android I get the following error:
error Failed to install the app. Make sure you have the Android development environment set up
Error: Command failed: ./gradlew app:installDebug -PreactNativeDevServerPort=8081
I have downloaded Android studio, setup a virtual device, installed necessary JDK.
How can I resolve?
Full error message:
FAILURE: Build failed with an exception.
* What went wrong:
Could not determine the dependencies of task ':app:preDebugBuild'.
> Could not resolve all task dependencies for configuration ':app:debugRuntimeClasspath'.
> Could not resolve project :react-native-camera.
Required by:
project :app
> Cannot choose between the following variants of project :react-native-camera:
- generalDebugRuntimeElements
- mlkitDebugRuntimeElements
All of them match the consumer attributes:
- Variant 'generalDebugRuntimeElements' capability VerizonApp:react-native-camera:unspecified:
- Unmatched attributes:
- Found com.android.build.api.attributes.VariantAttr 'generalDebug' but wasn't required.
- Found react-native-camera 'general' but wasn't required.
- Compatible attributes:
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'debug'.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
- Required org.gradle.usage 'java-runtime' and found compatible value 'java-runtime'.
- Variant 'mlkitDebugRuntimeElements' capability VerizonApp:react-native-camera:unspecified:
- Unmatched attributes:
- Found com.android.build.api.attributes.VariantAttr 'mlkitDebug' but wasn't required.
- Found react-native-camera 'mlkit' but wasn't required.
- Compatible attributes:
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'debug'.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
- Required org.gradle.usage 'java-runtime' and found compatible value 'java-runtime'.

Add this code in android/app/build.gradle
android {
...
defaultConfig {
...
missingDimensionStrategy 'react-native-camera', 'general' <-- insert this line
}
}

I believe you have to set the variant in your android/app/build.gradle.
Read here for more details (Point number 4) : https://react-native-community.github.io/react-native-camera/docs/installation

Including OpenCV in Android Studio project yields 'Unresolved dependencies' error

I'm trying to include OpenCV in my Android Studio project using this step by step guide. However, after adding OpenCV as module dependency (step 4 in the guide) the Gradle project sync fails with the following errors:
ERROR: Unable to resolve dependency for ':app#debug/compileClasspath': Could not resolve project :openCVLibrary410.
Show Details
Affected Modules: app
ERROR: Unable to resolve dependency for ':app#debugAndroidTest/compileClasspath': Could not resolve project :openCVLibrary410.
Show Details
Affected Modules: app
ERROR: Unable to resolve dependency for ':app#debugUnitTest/compileClasspath': Could not resolve project :openCVLibrary410.
Show Details
Affected Modules: app
I found this related question and tried adjusting the buildTypes in the openCV build.gradle by adding a debug field, but it did not change anything. I also tried to adjust the app's build.gradle as follows
buildTypes {
release {
...
}
debug {
matchingFallbacks = ['release']
}
}
(and several slightly different versions of this because I wasn't entirely sure what I was doing there) but none helped. I also tried setting the build variant of the OpenCV library to release instead of debug, but this resulted in the following error:
Unable to find a matching variant of project :openCVLibrary410:
- Variant 'debugApiElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'debug'.
- Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
- Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
- Variant 'debugBundleElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' but no value provided.
- Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but no value provided.
- Required org.gradle.usage 'java-api' and found incompatible value 'android-bundle'.
- Variant 'debugMetadataElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'debug'.
- Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Metadata'.
- Required org.gradle.usage 'java-api' but no value provided.
- Variant 'debugRuntimeElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'debug'.
- Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
- Required org.gradle.usage 'java-api' and found incompatible value 'java-runtime'.
- Variant 'releaseApiElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'release'.
- Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
- Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
- Variant 'releaseBundleElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' but no value provided.
- Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but no value provided.
- Required org.gradle.usage 'java-api' and found incompatible value 'android-bundle'.
- Variant 'releaseMetadataElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'release'.
- Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Metadata'.
- Required org.gradle.usage 'java-api' but no value provided.
- Variant 'releaseRuntimeElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'release'.
- Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
- Required org.gradle.usage 'java-api' and found incompatible value 'java-runtime'.
Any idea how to resolve this?

I finally solved this by changing the line
apply plugin: 'com.android.application'
in the imported OpenCV module's build.gradle file to
apply plugin: 'com.android.library'
and deleting the defaultConfig field in the same gradle file.
I found this solution here.

Import version 3.4.6 slightly older than the latest version.
The latest version may not be stable yet.
The same symptoms occurred in my environment but were resolved using version 3.4.6.

Android studio gradle building failed when one project add to other project as module?

I have two different project and trying to add one project to another as module and successfully import project as module. But when I add dependencies from project structure, gradle shows following errors:
Error:Unable to find a matching configuration of project :appim:
- Configuration 'debugApiElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'debug'.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
- Found com.android.build.gradle.internal.dependency.VariantAttr 'debug' but wasn't required.
- Required org.gradle.api.attributes.Usage 'java-api' and found compatible value 'java-api'.
- Configuration 'debugMetadataElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'debug'.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Metadata'.
- Found com.android.build.gradle.internal.dependency.VariantAttr 'debug' but wasn't required.
- Required org.gradle.api.attributes.Usage 'java-api' but no value provided.
- Configuration 'debugRuntimeElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'debug'.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
- Found com.android.build.gradle.internal.dependency.VariantAttr 'debug' but wasn't required.
- Required org.gradle.api.attributes.Usage 'java-api' and found incompatible value 'java-runtime'.
- Configuration 'releaseApiElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found incompatible value 'release'.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
- Found com.android.build.gradle.internal.dependency.VariantAttr 'release' but wasn't required.
- Required org.gradle.api.attributes.Usage 'java-api' and found compatible value 'java-api'.
- Configuration 'releaseMetadataElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found incompatible value 'release'.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Metadata'.
- Found com.android.build.gradle.internal.dependency.VariantAttr 'release' but wasn't required.
- Required org.gradle.api.attributes.Usage 'java-api' but no value provided.
- Configuration 'releaseRuntimeElements':
- Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found incompatible value 'release'.
- Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
- Found com.android.build.gradle.internal.dependency.VariantAttr 'release' but wasn't required.
- Required org.gradle.api.attributes.Usage 'java-api' and found incompatible value 'java-runtime'.
I have tried the solution from below links but cannot figure it out.
Gradle 4.0 Unable to find a matching configuration
Android Studio 3.0 Compile Issue (Cannot choose between Configurations)

uploadArchives configuration resolution fails with Android Plugin 3.1.2

I am attempting to create and Android Library project with the latest Android Gradle plugin and am having a hard time understanding the error it is giving me. My setup is a java module, android library module and a second android library module. They are all within the same project.
Module A (built with java (not java-library) plugin)
Module B (built with android library plugin)
Module C (build with android library plugin)
Module B depends on Module A
Module C depends on both Module A and Module B
Module C's dependency block:
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation project(':moduleA')
implementation project(':moduleB')
}
Gradle syncs fine and assemble executes correctly. I am using Gradle 4.6 (have tried with 4.4 as well) and Android Gradle Plugin 3.1.2. The problem occurs both in Android Studio and on Jenkins. When trying to run uploadArchives I receive the following error:
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':moduleC:uploadArchives'.
> Could not publish configuration 'archives'
> Could not resolve all files for configuration ':moduleC:archives'.
> Could not resolve project :moduleB.
Required by:
project :moduleC
> Cannot choose between the following configurations of project :moduleB:
- debugApiElements
- debugRuntimeElements
- releaseApiElements
- releaseRuntimeElements
All of them match the consumer attributes:
- Configuration 'debugApiElements':
- Found com.android.build.api.attributes.BuildTypeAttr 'debug' but wasn't required.
- Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
- Found com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but wasn't required.
- Found org.gradle.usage 'java-api' but wasn't required.
- Configuration 'debugRuntimeElements':
- Found com.android.build.api.attributes.BuildTypeAttr 'debug' but wasn't required.
- Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
- Found com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but wasn't required.
- Found org.gradle.usage 'java-runtime' but wasn't required.
- Configuration 'releaseApiElements':
- Found com.android.build.api.attributes.BuildTypeAttr 'release' but wasn't required.
- Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
- Found com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but wasn't required.
- Found org.gradle.usage 'java-api' but wasn't required.
- Configuration 'releaseRuntimeElements':
- Found com.android.build.api.attributes.BuildTypeAttr 'release' but wasn't required.
- Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
- Found com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but wasn't required.
- Found org.gradle.usage 'java-runtime' but wasn't required.

Gradle: Cannot choose between the configurations of project

Error:Cannot choose between the following configurations of project :ViewLib:
- debugApiElements
- debugRuntimeElements
- releaseApiElements
- releaseRuntimeElements
All of them match the consumer attributes:
- Configuration 'debugApiElements':
- Found com.android.build.api.attributes.BuildTypeAttr 'debug' but wasn't required....
i have updated classpath ... gradle version to 3.0.1 and distribution url to 4.0..
gradle refer this link
https://drive.google.com/open?id=10ZxsarUjeXi1SqS7njCZCLKM7yaoRyZ-eIHC3IghCkI