problem running react native on emulator and physical device on Windows

Question

I followed all steps here https://reactnative.dev/docs/environment-setup (React Native CLI QuickStart) but nothing helps every time I try to run the application I face this problem I think it because java jdk or the gradle (I did everything correct) can anybody help please

I followed all steps here https://reactnative.dev/docs/environment-setup (React Native CLI QuickStart) but nothing helps every time I try to run the application I face this problem I think it because java jdk or the gradle (I did everything correct) can anybody help please

info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag.
Jetifier found 967 file(s) to forward-jetify. Using 4 workers...
info Starting JS server...
* daemon not running; starting now at tcp:5037
* daemon started successfully
info Launching emulator...
info Successfully launched emulator.
info Installing the app...
Starting a Gradle Daemon, 2 incompatible and 1 stopped Daemons could not be reused, use --status for details      
File C:UsersMouhammad-PC.android
epositories.cfg could not be loaded.
IOException: https://dl.google.com/android/repository/addons_list-3.xml
java.net.ConnectException: Connection refused: connect
IOException: https://dl.google.com/android/repository/addons_list-2.xml
java.net.ConnectException: Connection refused: connect
IOException: https://dl.google.com/android/repository/addons_list-1.xml
java.net.ConnectException: Connection refused: connect
Failed to download any source lists!
IO exception while downloading manifest:
java.net.ConnectException: Connection refused: connect
        at java.net.DualStackPlainSocketImpl.connect0(Native Method)
        at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:75)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:476)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:218)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:200)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:162)
        at java.net.Socket.connect(Socket.java:606)
        at java.net.Socket.connect(Socket.java:555)
        at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
        at sun.net.www.http.HttpClient$1.run(HttpClient.java:515)
        at sun.net.www.http.HttpClient$1.run(HttpClient.java:513)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.net.www.http.HttpClient.privilegedOpenServer(HttpClient.java:512)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:553)
        at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:292)
        at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:395)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1205)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1056)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:167)
        at com.android.sdklib.repository.legacy.remote.internal.DownloadCache.openUrl(DownloadCache.java:247)
        at com.android.sdklib.repository.legacy.remote.internal.DownloadCache.downloadAndCache(DownloadCache.java:624)
        at com.android.sdklib.repository.legacy.remote.internal.DownloadCache.openCachedUrl(DownloadCache.java:547)
        at com.android.sdklib.repository.legacy.LegacyDownloader.downloadAndStream(LegacyDownloader.java:61)      
        at com.android.repository.impl.downloader.LocalFileAwareDownloader.downloadAndStream(LocalFileAwareDownloader.java:51)
        at com.android.repository.impl.manager.RemoteRepoLoaderImpl.lambda$fetchPackages$0(RemoteRepoLoaderImpl.java:149)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

Still waiting for package manifests to be fetched remotely.

Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/6.2/userguide/command_line_interface.html#sec:command_line_warnings

FAILURE: Build failed with an exception.

* What went wrong:
Could not determine the dependencies of task ':app:installDebug'.
> Failed to find Build Tools revision 28.0.3

* 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 1m 49s

error Failed to install the app. Make sure you have the Android development environment set up: https://reactnative.dev/docs/environment-setup. Run CLI with --verbose flag for more details.
Error: Command failed: gradlew.bat app:installDebug -PreactNativeDevServerPort=8081

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! reactproject@0.0.1 android: `react-native run-android`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the reactproject@0.0.1 android script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:UsersMouhammad-PCAppDataRoaming
pm-cache\_logs2021-01-06T19_21_06_301Z-debug.log
The terminal process "C:WindowsSystem32WindowsPowerShellv1.0powershell.exe -Command npm run android" terminated with exit code: 1.

Answer 1

* What went wrong:
Could not determine the dependencies of task ':app:installDebug'.
> Failed to find Build Tools revision 28.0.3

Looks like you need to go into the Android Studio settings and make sure you have that specific version installed (there are many, and you can install multiple of them)