我是React Native的初学者。现在,我正在尝试将https://wix.github.io/react-native-navigation/#/库集成到我的本机应用程序中。目前,我仅针对Android平台。
我已经执行了文档中提到的所有步骤,但是当我尝试使用react-native run-android
在应用程序上运行时,会出现以下错误。
error: package com.reactnativenavigation does not exist
我理解错误的含义,它表示此软件包在我的项目中不存在,但我是从npm安装的,并且它存在于节点模块中。
我正在使用最新版本的Node.js和npm,下面是package.json依赖项。
"dependencies": {
"react": "16.8.3",
"react-native": "^0.59.6",
"react-native-navigation": "^2.18.2",
"react-native-vector-icons": "^6.4.2",
"react-redux": "^7.0.2",
"redux": "^4.0.1"
},
"devDependencies": {
"@babel/core": "^7.4.3",
"@babel/runtime": "^7.4.3",
"babel-jest": "^24.7.1",
"jest": "^24.7.1",
"metro-react-native-babel-preset": "^0.53.1",
"react-test-renderer": "16.8.3"
},
完全错误:
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainActivity.java:19: error: package com.reactnativenavigation does not exist
import com.reactnativenavigation.NavigationActivity;
^
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainActivity.java:21: error: cannot find symbol
public class MainActivity extends NavigationActivity {
^
symbol: class NavigationActivity
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainApplication.java:12: error: package com.reactnativenavigation does not exist
import com.reactnativenavigation.NavigationApplication;
^
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainApplication.java:13: error: package com.reactnativenavigation.react does not exist
import com.reactnativenavigation.react.NavigationReactNativeHost;
^
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainApplication.java:14: error: package com.reactnativenavigation.react does not exist
import com.reactnativenavigation.react.ReactGateway;
^
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainApplication.java:20: error: cannot find symbol
public class MainApplication extends NavigationApplication {
^
symbol: class NavigationApplication
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainApplication.java:54: error: cannot find symbol
protected ReactGateway createReactGateway() {
^
symbol: class ReactGateway
location: class MainApplication
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainApplication.java:53: error: method does not override or implement a method from a supertype
@Override
^
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainApplication.java:55: error: cannot find symbol
ReactNativeHost host = new NavigationReactNativeHost(this, isDebug(), createAdditionalReactPackages()) {
^
symbol: class NavigationReactNativeHost
location: class MainApplication
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainApplication.java:56: error: method does not override or implement a method from a supertype
@Override
^
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainApplication.java:61: error: cannot find symbol
return new ReactGateway(this, isDebug(), host);
^
symbol: class ReactGateway
location: class MainApplication
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainApplication.java:64: error: method does not override or implement a method from a supertype
@Override
^
E:\data\code\practise\react-native\reactNativeStart\android\app\src\main\java\com\reactnativestart\MainApplication.java:77: error: method does not override or implement a method from a supertype
@Override
^
13 errors
答案 0 :(得分:2)
我不认为降级是一个好的解决方案。我遇到了这个问题,我假设您仍在使用React Native 60+(在我的情况下为0.61)。我通过忽略除RN 60以外的所有以前版本来解决此问题。我相信它与if块中列出的所有版本的插件有关。
因此,在您的android/build.gradle
中,代码位于底部下方
subprojects { subproject ->
afterEvaluate {
if ((subproject.plugins.hasPlugin('android') || subproject.plugins.hasPlugin('android-library'))) {
android {
variantFilter { variant ->
def names = variant.flavors*.name
if (
names.contains("reactNative51") ||
names.contains("reactNative55") ||
names.contains("reactNative56") ||
names.contains("reactNative57") ||
names.contains("reactNative57_5")
// names.contains("reactNative60")
) {
setIgnore(true)
}
}
}
}
}
}
在MainApplication.java
中约有无法识别的符号之后,您可能会遇到错误,其中文档也提供了错误的信息。
下面的MainApplication.java中应该是您的MainApplication方法。我已将getPackages()方法更改为RN的原始方法,就像在RN 60中一样,RNN使用的方法具有类型错误
public class MainApplication extends NavigationApplication {
@Override
protected ReactGateway createReactGateway() {
ReactNativeHost host = new NavigationReactNativeHost(this, isDebug(), createAdditionalReactPackages()) {
@Override
protected String getJSMainModuleName() {
return "index";
}
};
return new ReactGateway(this, isDebug(), host);
}
@Override
public boolean isDebug() {
return BuildConfig.DEBUG;
}
protected List<ReactPackage> getPackages() {
@SuppressWarnings("UnnecessaryLocalVariable")
List<ReactPackage> packages = new PackageList(this).getPackages();
// Packages that cannot be autolinked yet can be added manually here, for example:
// packages.add(new MyReactNativePackage());
return packages;
}
@Override
public List<ReactPackage> createAdditionalReactPackages() {
return getPackages();
}
}
答案 1 :(得分:1)
它具有react-native-navigation软件包错误。套件无法正确导入,请使用android studio。如果有任何软件包问题,android stdio将显示该问题。
最好的方法是使用android studio
打开android studio->打开项目android文件夹->并同步项目->转到Mainapplication.java->您可以通过android studio导入插件。
再次同步,它将解决此问题
答案 2 :(得分:0)
我也有问题,我真的不知道这是什么。我重新安装react native项目并重复手册(https://wix.github.io/react-native-navigation/#/docs/Installing?id=android)中的所有步骤。之后,“构建”开始工作))
答案 3 :(得分:0)
就我而言,我更改了一些局部环境变量。正在运行:
yarn install
在我的本机目录中完成了这项任务。建立正常。如果您使用的是npm:应该是:
npm install
答案 4 :(得分:-1)
我有完全一样的问题。我尝试了所有结果,没有结果。我的react native版本是0.60.0,我将其降级到0.57.0,重复https://wix.github.io/react-native-navigation/#/docs/Installing?id=android中的步骤,一切都很好。