TypeError：null 不是对象（评估 '_RNGestureHandlerModule.default.Direction'）

Question

这是我的 package.json 文件，我已经安装了所有依赖项，但在 android 中仍然存在问题

{
  "name": "Free",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "android": "react-native run-android",
    "ios": "react-native run-ios",
    "start": "react-native start",
    "test": "jest",
    "lint": "eslint ."
  },
  "dependencies": {
    "@react-native-community/masked-view": "^0.1.10",
    "@react-navigation/native": "^5.7.4",
    "@react-navigation/stack": "^5.9.1",
    "react": "16.13.1",
    "react-native": "0.63.2",
    "react-native-gesture-handler": "^1.8.0",
    "react-native-safe-area-context": "^3.1.8",
    "react-native-screens": "^2.11.0",
    "react-navigation": "^4.4.1"
  },
  "devDependencies": {
    "@babel/core": "7.11.6",
    "@babel/runtime": "7.11.2",
    "@react-native-community/eslint-config": "1.1.0",**

strong text

**
    "babel-jest": "25.5.1",
    "eslint": "6.8.0",
    "jest": "25.5.4",
    "metro-react-native-babel-preset": "0.59.0",
    "react-test-renderer": "16.13.1"
  },
  "jest": {
    "preset": "react-native"
  }
}

我收到了这个错误..

TypeError: null 不是对象（评估 '_RNGestureHandlerModule.default.Direction')

有什么想法吗？

Answer 1

确保您拥有以下内容：

MainActivity.java：

import com.facebook.react.ReactActivityDelegate;
import com.facebook.react.ReactRootView;
import com.swmansion.gesturehandler.react.RNGestureHandlerEnabledRootView;

然后将它添加到 MainActivity 类中，就在受保护的字符串之后

getMainComponentName() function
@Override
protected ReactActivityDelegate createReactActivityDelegate() {
return new ReactActivityDelegate(this, getMainComponentName()) {
@Override
protected ReactRootView createRootView() {
return new RNGestureHandlerEnabledRootView(MainActivity.this);
}
};
}

然后执行以下操作：

cd android
gradlew clean
cd ..

最后重新运行应用程序：react-native run-android