React Native:Webview getUserMedia无法正常工作(onPermissionRequest覆盖?)

时间:2017-12-14 10:46:22

标签: android react-native webview android-webview getusermedia

我正在使用React Native为 iOS,Android和Windows 开发应用程序,我需要通过WebView显示网页。该网页访问设备的相机,因此它使用MediaDevices.getUserMedia() Javascript功能。

即使在智能手机上的Chrome应用中,它也可以在桌面上正常运行,。但是,当我通过React Native <WebView />调用网页时,出现PermissionDenied错误。问题是没有显示请求让我接受该权限。它只是在不问的情况下否认了这个请求。

以下是我的WebView元素示例:

    <WebView 
        style={{flex: 1}}
        mediaPlaybackRequiresUserAction={false}
        domStorageEnabled={true}
        allowsInlineMediaPlayback={true}
        source={{uri: 'https://myurltomyapp.com/index.html'}} 
        startInLoadingState={true}
        allowUniversalAccessFromFileURLs={true}
    />

我已经在AndroidManifest.xml上设置了所有必要的权限(甚至为了测试而不需要一些权限):

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.CAPTURE_AUDIO_OUTPUT" />
    <uses-permission android:name="android.permission.CAPTURE_SECURE_VIDEO_OUTPUT" />
    <uses-permission android:name="android.permission.CAPTURE_VIDEO_OUTPUT" />
    <uses-permission android:name="android.permission.RECORD_AUDIO"/>
    <uses-permission android:name="android.permission.RECORD_VIDEO"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />

是的,托管网站的网址已通过SSL认证,因此通过HTTPS进行验证。它适用于Chrome应用,因此它也适用于WebView

我一直在阅读网络,似乎是因为React Native WebView缺少onPermissionRequest()实现,所以它无声地失败(并拒绝它)。

有没有办法在React Native中实现覆盖原生WebView ?如果可能,我必须编辑哪些文件?是否有任何第三方模块(最新版本)已实施(尚未能找到)?

谢谢。

2 个答案:

答案 0 :(得分:10)

最后,我必须在原生Android中实现自己的WebView组件。问题是onPermissionRequest()函数,它没有在本机WebView中实现。您必须创建自己的并覆盖该功能。就我而言,我必须添加以下代码(所有文件都在路径[react-native-project]/android/app/src/main/java/com/listproject/permissionwebview/下):

PermissionWebviewPackage.java

package com.listproject.permissionwebview;

import com.facebook.react.ReactPackage;
import com.facebook.react.bridge.NativeModule;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.uimanager.ViewManager;

import java.util.Arrays;
import java.util.Collections;
import java.util.ArrayList;
import java.util.List;

/**
 * Add this package to getPackages() method in MainActivity.
 */

public class PermissionWebviewPackage implements ReactPackage {

    @Override
    public List<ViewManager> createViewManagers(
            ReactApplicationContext reactContext) {
        return Arrays.<ViewManager>asList(
            new PermissionWebviewViewManager()
          );
    }

    @Override
    public List<NativeModule> createNativeModules(
            ReactApplicationContext reactContext) {
        return Collections.emptyList();
    }
}

PermissionWebviewView.java

package com.listproject.permissionwebview;
import android.content.Context;
import android.widget.LinearLayout;
import android.os.Bundle;
import android.widget.Toast;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.webkit.PermissionRequest;
import android.webkit.WebSettings;
import android.net.http.SslCertificate;
import android.net.http.SslError;
import android.webkit.SslErrorHandler;
import android.support.v4.app.ActivityCompat;
import android.app.LocalActivityManager;
import android.view.ViewGroup;
import android.Manifest;
import android.app.Activity;
import com.listproject.MainActivity;
import com.listproject.R;

public class PermissionWebviewView extends WebView{

    private Context context;

    public PermissionWebviewView(Context context) {
        super(context);
        this.context = context;

        this.setWebViewClient(new WebViewClient());

        WebSettings webSettings = this.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webSettings.setAllowFileAccessFromFileURLs(true);
        webSettings.setAllowUniversalAccessFromFileURLs(true);
        webSettings.setMediaPlaybackRequiresUserGesture(false);
        webSettings.setUseWideViewPort(true);
        webSettings.setDomStorageEnabled(true);

        this.setWebChromeClient(new WebChromeClient() {
            @Override
            public void onPermissionRequest(final PermissionRequest request) {
                request.grant(request.getResources());
            }
        });
    }
}

PermissionWebviewViewManager.java

package com.listproject.permissionwebview;

import com.facebook.react.uimanager.SimpleViewManager;
import com.facebook.react.uimanager.ThemedReactContext;

import com.facebook.react.bridge.NativeModule;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContext;
import com.facebook.react.uimanager.annotations.ReactProp;

public class PermissionWebviewViewManager extends SimpleViewManager<PermissionWebviewView> {

    public static final String REACT_CLASS = "PermissionWebviewViewManager";
    private String source;

    @Override
    public String getName() {
        return REACT_CLASS;
    }

    @Override
    public PermissionWebviewView createViewInstance(ThemedReactContext context) {
        return new PermissionWebviewView(context); //If your customview has more constructor parameters pass it from here.
    }

    @ReactProp(name = "sourceUri")
    public void setSource(PermissionWebviewView view, String source) {
        view.loadUrl(source);
    }
}

最后,更新您的MainApplication.java文件,并将您的包添加到getPackages()函数中:

@Override
protected List<ReactPackage> getPackages() {
  return Arrays.<ReactPackage>asList(
      new MainReactPackage(),
        [...],
        new PermissionWebviewPackage()
  );
}

请记住,listprojectpermissionwebview等的名称可以更改为您需要的名称,只要您在文件的名称空间和包中更改它们即可引用。

完成所有这些后,您需要创建的只是ReactNative组件导出([react-native-project]/app/components/PermissionWebView/index.android.js):

import PropTypes from 'prop-types';
import {requireNativeComponent, ViewPropTypes} from 'react-native';

// The 'name' property is not important, the important one is below
var mcs = {
  name: 'PermissionWebview',
  propTypes: {
    sourceUri: PropTypes.string,
      ...ViewPropTypes
  }
};

module.exports = requireNativeComponent('PermissionWebviewViewManager', mcs);

请注意,我们将索引名称设置为index.android.js,因为此组件是针对Android制作的,因此它仅包含在Android平台中。

有了这个,一切都应该有效,WebView组件应该在使用时请求权限。

编辑:

我已将代码上传到Github repository。我只更改了一些名称,但核心代码没有改变,以确保它仍然有效(我无法测试它,所以最好不要改变很多东西)。

希望它有所帮助!

答案 1 :(得分:0)

就我而言,以下代码有效。

步骤1:向AndroidManifest.xml添加权限

<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.MICROPHONE" />
<uses-permission android:name="android.permission.CAMERA" />
<!-- any additional permissions -->

第2步:从“ react-native”包中为“ PermissionsAndroid”添加导入语句

import {
  PermissionsAndroid
} from 'react-native';

第3步:编写异步方法以获取所需的权限,这里我获得了“摄像头和麦克风”权限

cameraPermission = async () => {

    let granted = await PermissionsAndroid.request(
      PermissionsAndroid.PERMISSIONS.CAMERA,
      {
        title: "Camera Permission",
        message:
          "App needs access to your camera " +
          "so others can see you.",
        buttonNeutral: "Ask Me Later",
        buttonNegative: "Cancel",
        buttonPositive: "OK"
      }
    );
    if (granted === PermissionsAndroid.RESULTS.GRANTED) {
      console.log("You can use the camera");
    } else {
      console.log("Camera permission denied");
    }
}

micPermission = async () => {

let granted = await PermissionsAndroid.request(
  PermissionsAndroid.PERMISSIONS.RECORD_AUDIO,
  {
    title: "Audio Permission",
    message:
      "App needs access to your audio / microphone",
    buttonNeutral: "Ask Me Later",
    buttonNegative: "Cancel",
    buttonPositive: "OK"
  }
);

if (granted === PermissionsAndroid.RESULTS.GRANTED) {
  console.log("You can use the Microphone");
} else {
  console.log("Microphone permission denied");
}  

micPermission = async () => {
    let granted = await PermissionsAndroid.request(
      PermissionsAndroid.PERMISSIONS.RECORD_AUDIO,
      {
        title: "Audio Permission",
        message:
          "App needs access to your audio / microphone",
        buttonNeutral: "Ask Me Later",
        buttonNegative: "Cancel",
        buttonPositive: "OK"
      }
    );

    if (granted === PermissionsAndroid.RESULTS.GRANTED) {
      console.log("You can use the Microphone");
    } else {
      console.log("Microphone permission denied");
    }    
}

第4步:在componentDidMount上触发权限

componentDidMount() {
  this.cameraPermission();
  this.micPermission();
}

第5步:添加具有媒体属性的WebView

render() {
return (
  <WebView
    userAgent={this.state.userAgent} //Set your useragent (Browser) **Very Important
    originWhitelist={['*']}
    allowsInlineMediaPlayback
    bounces={true}
    source={{
      uri: this.state.url, //URL of your redirect site
    }}
    startInLoadingState
    scalesPageToFit
    javaScriptEnabled={true}
  />
);
}

希望这会有所帮助!