我对React Native完全不熟悉我使用以下命令在React Native中创建了第一个项目:
但是在执行“react-native run-android”时我得到了这个错误 -
请帮帮我。
After more efforts this error was resolved but now getting another error
Solutions which I have tried was:
Solution 1:
1. Open your project in Android Studio i.e. android folder of your react native project
2. Sync your project so that gradle.zip will download properly
3. Then run your project.
Solution 2:
1. Open your React native project
2. Navigate to android folder within it
3. Go to gradle folder inside it
4. Open gradle-wrapper.properties
5. And modify your distributionUrl from "https" to "http"
6. Run your project
But at the end another error was occurred which was mentioned below.
>react-native run-android
info Starting JS server...
info Building and installing the app on the device (cd android && gradlew.bat ap
p:installDebug)...
Picked up _JAVA_OPTIONS: -Xmx1024M
FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring root project 'FirstApp'.
> Could not resolve all artifacts for configuration ':classpath'.
> Could not resolve org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.21.
Required by:
project : > com.android.tools.build:gradle:3.3.2
project : > com.android.tools.build:gradle:3.3.2 > com.android.tools.bu
ild:builder:3.3.2
project : > com.android.tools.build:gradle:3.3.2 > com.android.tools.an
alytics-library:shared:26.3.2
project : > com.android.tools.build:gradle:3.3.2 > com.android.tools.li
nt:lint-gradle-api:26.3.2
project : > com.android.tools.build:gradle:3.3.2 > com.android.tools.bu
ild:gradle-api:3.3.2
project : > com.android.tools.build:gradle:3.3.2 > androidx.databinding
:databinding-compiler-common:3.3.2
project : > com.android.tools.build:gradle:3.3.2 > com.android.tools.bu
ild:builder:3.3.2 > com.android.tools:sdk-common:26.3.2
project : > com.android.tools.build:gradle:3.3.2 > com.android.tools.bu
ild:builder:3.3.2 > com.android.tools:common:26.3.2
project : > com.android.tools.build:gradle:3.3.2 > com.android.tools.bu
ild:builder:3.3.2 > com.android.tools.build:manifest-merger:26.3.2
project : > com.android.tools.build:gradle:3.3.2 > com.android.tools.bu
ild:builder:3.3.2 > com.android.tools.analytics-library:tracker:26.3.2
project : > com.android.tools.build:gradle:3.3.2 > com.android.tools.bu
ild:builder:3.3.2 > com.android.tools:sdklib:26.3.2 > com.android.tools:reposito
ry:26.3.2
> Could not resolve org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.21.
> Could not get resource 'https://jcenter.bintray.com/org/jetbrains/kot
lin/kotlin-stdlib-jdk8/1.3.21/kotlin-stdlib-jdk8-1.3.21.pom'.
> Could not GET 'https://jcenter.bintray.com/org/jetbrains/kotlin/ko
tlin-stdlib-jdk8/1.3.21/kotlin-stdlib-jdk8-1.3.21.pom'.
> sun.security.validator.ValidatorException: PKIX path building f
ailed: sun.security.provider.certpath.SunCertPathBuilderException: unable to fin
d valid certification path to requested target
> Could not resolve org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.21.
> Could not get resource 'https://dl.google.com/dl/android/maven2/org/j
etbrains/kotlin/kotlin-stdlib-jdk8/1.3.21/kotlin-stdlib-jdk8-1.3.21.pom'.
> Could not GET 'https://dl.google.com/dl/android/maven2/org/jetbrai
ns/kotlin/kotlin-stdlib-jdk8/1.3.21/kotlin-stdlib-jdk8-1.3.21.pom'.
> sun.security.validator.ValidatorException: PKIX path building f
ailed: sun.security.provider.certpath.SunCertPathBuilderException: unable to fin
d valid certification path to requested target
* 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 13s
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.bat app:installDebug
我正在手机中执行我的项目我已经使用“adb devices”命令检查了我的设备是否正确连接。我的设备名称已显示。
所以我不明白下一步该做什么。
I was trying to solve this error and got a solution which i have implemented
1. Open your react native project in android studio
2. File -> Settings -> Remote Jar Repositories -> Click on Add Button
3. Add maven Repository URL given below:
https://mvnrepository.com/artifact/com.android.tools/sdklib
4. Sync your project
Many error was gone.
只是想帮助解决以下提到的错误:
* What went wrong:
A problem occurred configuring root project 'FirstApp'.
> Could not resolve all artifacts for configuration ':classpath'.
> Could not download bcpkix-jdk15on.jar (org.bouncycastle:bcpkix-jdk15on:1.56
)
> Could not get resource 'https://jcenter.bintray.com/org/bouncycastle/bcp
kix-jdk15on/1.56/bcpkix-jdk15on-1.56.jar'.
> Could not HEAD 'https://jcenter.bintray.com/org/bouncycastle/bcpkix-j
dk15on/1.56/bcpkix-jdk15on-1.56.jar'.
> sun.security.validator.ValidatorException: PKIX path building fail
ed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find v
alid certification path to requested target
提前致谢!
经过多次努力,我找到了适合我的解决方案。
解:
Step 1:
Open (Project Level) gradle file and add repositories given below:
repositories {
google()
mavenCentral()
jcenter { url "https://jcenter.bintray.com/"}
}
allprojects {
repositories {
google()
mavenCentral()
maven {
url "https://maven.google.com"
}
jcenter { url "https://jcenter.bintray.com/"}
maven {
// All of React Native (JS, Obj-C sources, Android binaries) is installed
from npm
url "$rootDir/../node_modules/react-native/android"
}
}
}
Step 2: change directory to android i.e. cd android
Example: Here, my project name was FirstApp so the path was
C:\Users\HOME\Desktop\FirstApp
and then change directory: cd android
So that the path become look like this : C:\Users\HOME\Desktop\FirstApp\android
Step 3: Refresh dependencies i.e. sync your gradle with the following command
gradlew build --refresh-dependencies
Step 4: cd..
Step 5: Execute your react native project
react-native run-android
Hope, it will work to others also :)