react-native-video [android] undefined 不是一個對象（評估 NativeModuels.UIManager.RCTVideo.Constants'）

Question

我將 react native 集成到現有的 android 應用程序中，我正在嘗試使用 react-native-video 組件在應用程序上顯示視頻。

• 反應原生：0.42.0
• 反應原生視頻：1.0.0

我按照這里的說明操作： https : //github.com/react-native-community/react-native-video

在 MainApplication.java 我添加了這個：

import com.brentvatne.react.ReactVideoPackage;
....
@Override
    public List<ReactPackage> getPackages() {
        return Arrays.<ReactPackage>asList(
                new MainReactPackage(),
                new ReactVideoPackage()
        );
}

我將此添加到我的 settings.gradle （應用程序中只有一個）

include ':react-native-video'
project(':react-native-video').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-video/android')

在我的 android/app/build.gradle

compile project(':react-native-video')

在我的本機組件上：

import Video from 'react-native-video';
....
render() {
return (
  <View>
  <Video source={{uri: 'https://vjs.zencdn.net/v/oceans.mp4'}} resizeMode="cover" repeat={true}  />
....

反應原生組件正確構建，但最終在黃色屏幕上顯示此警告，沒有其他內容：

Possible Unhandled Promise Rejection (id: 0):
             undefined is not an object (evaluating '_reactNative.NativeModules.UIManager.RCTVideo.Constants')
             render@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:46677:73
             http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12555:27
             measureLifeCyclePerf@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12015:14
             _renderValidatedComponentWithoutOwnerOrContext@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12554:45
             _renderValidatedComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12575:78
             performInitialMount@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12227:55
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12130:40
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:11170:49
             mountChildren@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:11615:56
             initializeChildren@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:9929:41
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:10012:28
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:11170:49
             performInitialMount@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12235:48
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12130:40
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:11170:49
             performInitialMount@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12235:48
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12130:40
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:11170:49
             performInitialMount@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12235:48
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12130:40
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:11170:49
             mountChildren@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:11615:56
             initializeChildren@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:9929:41
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:10012:28
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:11170:49
             performInitialMount@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12235:48
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:12130:40
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:11170:49
             mountChildren@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:11615:56
             initializeChildren@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:9929:41
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:10012:28
             mountComponent@http://localhost:8081/reactnative/wall.bundle?platform=android&dev=true&hot=false&minify=false:11170:49
             performInitialMount@http://localhost:8081/reactnati

謝謝！

Answer 1

修復了在創建 ReactInstanceManager 時添加 ReactVideoPackage

mReactInstanceManager = ReactInstanceManager.builder()
            .setApplication(getApplication())
            .setBundleAssetName("index.android.bundle")
            .setJSMainModuleName("index.android")
            .addPackage(new MainReactPackage())
            .addPackage(new ReactVideoPackage())//<-- this line fixed
            .setUseDeveloperSupport(BuildConfig.DEBUG)
            .setInitialLifecycleState(LifecycleState.RESUMED)
            .build();

Answer 2

cd ios 和 pod install 並再次鏈接庫

import React, {Component} from 'react';
import {
  View,
  Button,
  Text,
  Platform,
  StyleSheet,
  TouchableOpacity,
  TouchableHighlight,
  Animated,
  ScrollView,
  Image,
} from 'react-native';
import Video from 'react-native-video';

export default class App extends Component {

  render() {
    return (
      <View style={{flex: 1, marginTop: 50}}>

        <Video
          source={{uri: 'YOUR_URL'}} // Can be a URL or a local file.
          ref={ref => {
            this.player = ref;
          }} // Store reference
          onBuffer={this.onBuffer} // Callback when remote video is buffering
          onError={this.videoError} // Callback when video cannot be loaded
          style={styles.backgroundVideo}
        />
      </View>
    );
  }
}

const styles = StyleSheet.create({
  field: {
    flex: 1,
    flexDirection: 'row',
    justifyContent: 'space-between',
    paddingTop: 10,
    paddingBottom:10,
  },
  backgroundVideo: {
    position: 'absolute',
    top: 0,
    left: 0,
    bottom: 0,
    right: 0,
  },
});

注意react-native 鏈接 react-native-video