react-native run-android fails with error

Question

i'm getting the following errors in my console.

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.

• What went wrong: Execution failed for task ':react-native-video:compileDebugJavaWithJavac'.

  Compilation failed; see the compiler error output for details.

• Try:

  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

2: Task failed with an exception.

• What went wrong: Execution failed for task ':react-native-firebase:compileDebugJavaWithJavac'.

  Compilation failed; see the compiler error output for details.

• Try:

  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

Deprecated Gradle features were used in this build, making it incompatible with Gradle 5.0. Use '--warning-mode all' to show the individual deprecation warnings. See https://docs.gradle.org/4.10.1/userguide/command_line_interface.html#sec:command_line_warnings

BUILD FAILED in 10s 151 actionable tasks: 13 executed, 138 up-to-date error Could not install the app on the device, read the error above for details. Make sure you have an Android emulator running or a device connected and have set up your Android development environment: https://facebook.github.io/react-native/docs/getting-started.html error Command failed: ./gradlew app:installDebug. Run CLI with --verbose flag for more details.

Answer 1

Is your android device is connected. Check it with

adb devices

If no device name shows then, no device is connected, try to connect your device correctly and run

react-native run-android

and in different terminal run

npm start