When create a new project with backward compatible, 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."
Fix the issue:
By using the link provided above, we could fix the issue easily.
Configure project-wide properties
For projects that include multiple modules, it might be useful to define properties at the project level and share them across all modules. You can do this by adding extra properties to the ext block in the top-level build.gradle file.
buildscript {...}
allprojects {...}
// This block encapsulates custom properties and makes them available to all
// modules in the project.
ext {
// The following are only a few examples of the types of properties you can define.
compileSdkVersion = 26
// You can also use this to specify versions for dependencies. Having consistent
// versions between modules can avoid behavior conflicts.
supportLibVersion = "27.1.1"
...
}
...
To access these properties from a module in the same project, use the following syntax in the module-level build.gradle file.
android {
// Use the following syntax to access properties you define at the project level:
// rootProject.ext.property_name
compileSdkVersion rootProject.ext.compileSdkVersion
...
}
...
dependencies {
compile "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}"
...
}
