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                        /ReactNative入門與進(jìn)階

運(yùn)行出錯(cuò)！！卡了幾天了

info Starting JS server...

info Launching emulator...

error Failed to launch emulator. Reason: No emulators found as an output of `emulator -list-avds`.

warn Please launch an emulator manually or connect a device. Otherwise app may fail to launch.

info Installing the app...

> Task :app:installDebug FAILED

Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0.

Use '--warning-mode all' to show the individual deprecation warnings.

See https://docs.gradle.org/5.5/userguide/command_line_interface.html#sec:command_line_warnings

27 actionable tasks: 2 executed, 25 up-to-date

FAILURE: Build failed with an exception.

* What went wrong:

Execution failed for task ':app:installDebug'.

> com.android.builder.testing.api.DeviceException: No connected devices!

* 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

BUILD FAILED in 5s

error Failed to install the app. Make sure you have an Android emulator running or a device connected. Run CLI with --verbose flag for more details.

Error: Command failed: gradlew.bat app:installDebug -PreactNativeDevServerPort=8081

FAILURE: Build failed with an exception.

* What went wrong:

Execution failed for task ':app:installDebug'.

> com.android.builder.testing.api.DeviceException: No connected devices!

* 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

BUILD FAILED in 5s

? ? at checkExecSyncError (child_process.js:621:11)

? ? at execFileSync (child_process.js:639:15)

? ? at runOnAllDevices (E:\jinyu\android\AP\node_modules\@react-native-community\cli-platform-android\build\commands\runAndroid\runOnAllDevices.js:94:39)

? ? at processTicksAndRejections (internal/process/task_queues.js:93:5)

這是我運(yùn)行 react-native run-android后的所有信息什么模擬器也裝了 Android studio也裝了 Android sdk也裝了但是具體有沒有配置對(duì) 就不知道了求解