android - React-native 访问设备摄像头？ (特别是安卓)

Question

我试图允许用户在 react-native 应用程序中上传视频，但我什至无法访问相机。

** 不使用世博会。我使用 react-native cli 并使用 react-native-init 生成我的项目**

** 使用 react-native 版本 0.53.0。安卓版本 5.1 **

** 更新:经过一些好的建议后，我将我的 android/app/build.gradle 文件中的 compileSdkVersions 和 targetSdkVersions 更改为 > 23，并且知道问题不在于我的权限。此外，已弃用的 RCTCamera 版本的 react-native-camera 工作正常，我能够捕获静止图像和视频并将它们保存到设备中。只有使用 RNCamera 的主版本在每次屏幕加载时仍然会使应用程序崩溃:/

这不太理想，因为我不想在我的应用程序中有弃用的代码。所以当我在下面提到 react-native-camera 时，我指的是使用 RNCamera 而不是 RCTCamera 的当前版本。 **

我尝试使用 react-native-camera 包( https://github.com/react-native-community/react-native-camera )，但这会导致我的应用程序每次都崩溃。另外我想使用用户已经安装的相机应用程序，而不是构建我自己的相机 View ，这是 react-native-camera 需要的。

环顾四周，我偶然发现了三种有希望的方法来解决这个问题:

1) 链接 - 据我从 StackOverflow 帖子 (React native send a message to specific whatsapp Number 2) 中了解到，链接可用于打开用户在其设备上拥有的其他应用程序。我认为这也可以用来访问相机应用程序。但我还没有找到任何有关这方面的信息。如何检查用户是否拥有相机应用程序，然后链接到他们？理想情况下，用户手机上会出现一个弹出菜单，要求用户从可用的相机应用程序列表中进行选择。

2) 这篇来自 android 开发者文档的帖子 - https://developer.android.com/training/camera/videobasics.html .这描述了如何准确地做我想做的事，但是我在制作用于我的组件的 native 模块时遇到了麻烦。我对在 react-native 中构建桥梁有非常基本的知识，并且只有在阅读了几篇列出所有代码的文章后才能使一个简单的 native Toast 模块工作。那么任何人都可以编写一个 VideoModule.java 文件来实现与 android 文档指定的相同功能吗？这对我来说似乎是最简单的解决方案，但我对 Java/android 知识的缺乏阻碍了我。

3) ReactNativeWebRTC - 我已经在应用程序的不同屏幕上成功地包含了这个模块 (https://github.com/oney/react-native-webrtc)。但是当我使用这个模块在两个对等点之间流式传输视频时，它看不到如何使用它来上传视频。我查看了是否有类似于我用于应用程序网络版本的 MediaRecorder API 的东西，但我没有任何运气。但我知道，如果我可以从媒体流中获取二进制数据，那么我可以将其直接发送到我的服务器。那么，有没有办法直接存储来自 getUserMedia() 方法的媒体流，react-native-webrtc 在缓冲区中使用的媒体流没有像 web 上的 MediaRecorder？

任何解决方案在这里都会非常有帮助。而且由于我目前只有一部 Android 手机可供测试，因此我不需要有关如何使其与 iOS 一起使用的信息。只是安卓的解决方案。非常感谢。

这是我的 AndroidManifest.xml 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-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus"/>

<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.RECORD_VIDEO" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

我的 android/app/build.gradle 文件:

apply plugin: "com.android.application"

import com.android.build.OutputFile

/**
 * The react.gradle file registers a task for each build variant (e.g. bundleDebugJsAndAssets
 * and bundleReleaseJsAndAssets).
 * These basically call `react-native bundle` with the correct arguments during the Android build
 * cycle. By default, bundleDebugJsAndAssets is skipped, as in debug/dev mode we prefer to load 
the
 * bundle directly from the development server. Below you can see all the possible configurations
 * and their defaults. If you decide to add a configuration block, make sure to add it before the
 * `apply from: "../../node_modules/react-native/react.gradle"` line.
 *
 * project.ext.react = [
 *   // the name of the generated asset file containing your JS bundle
 *   bundleAssetName: "index.android.bundle",
 *
 *   // the entry file for bundle generation
 *   entryFile: "index.android.js",
 *
 *   // whether to bundle JS and assets in debug mode
 *   bundleInDebug: false,
 *
 *   // whether to bundle JS and assets in release mode
 *   bundleInRelease: true,
 *
 *   // whether to bundle JS and assets in another build variant (if configured).
 *   // See http://tools.android.com/tech-docs/new-build-system/user-guide#TOC-Build-Variants
 *   // The configuration property can be in the following formats
  *   //         'bundleIn${productFlavor}${buildType}'
 *   //         'bundleIn${buildType}'
 *   // bundleInFreeDebug: true,
 *   // bundleInPaidRelease: true,
 *   // bundleInBeta: true,
 *
 *   // whether to disable dev mode in custom build variants (by default only disabled in release)
 *   // for example: to disable dev mode in the staging build type (if configured)
 *   devDisabledInStaging: true,
 *   // The configuration property can be in the following formats
 *   //         'devDisabledIn${productFlavor}${buildType}'
 *   //         'devDisabledIn${buildType}'
 *
 *   // the root of your project, i.e. where "package.json" lives
 *   root: "../../",
 *
 *   // where to put the JS bundle asset in debug mode
 *   jsBundleDirDebug: "$buildDir/intermediates/assets/debug",
 *
 *   // where to put the JS bundle asset in release mode
 *   jsBundleDirRelease: "$buildDir/intermediates/assets/release",
 *
 *   // where to put drawable resources / React Native assets, e.g. the ones you use via
 *   // require('./image.png')), in debug mode
 *   resourcesDirDebug: "$buildDir/intermediates/res/merged/debug",
 *
 *   // where to put drawable resources / React Native assets, e.g. the ones you use via
 *   // require('./image.png')), in release mode
 *   resourcesDirRelease: "$buildDir/intermediates/res/merged/release",
 *
 *   // by default the gradle tasks are skipped if none of the JS files or assets change; this means
 *   // that we don't look at files in android/ or ios/ to determine whether the tasks are up to
 *   // date; if you have any other folders that you want to ignore for performance reasons (gradle
 *   // indexes the entire tree), add them here. Alternatively, if you have JS files in android/
 *   // for example, you might want to remove it from here.
 *   inputExcludes: ["android/**", "ios/**"],
 *
 *   // override which node gets called and with what additional arguments
 *   nodeExecutableAndArgs: ["node"],
 *
 *   // supply additional arguments to the packager
 *   extraPackagerArgs: []
 * ]
 */

 project.ext.react = [
    entryFile: "index.js"
 ]

 apply from: "../../node_modules/react-native/react.gradle"

 /**
 * Set this to true to create two separate APKs instead of one:
 *   - An APK that only works on ARM devices
 *   - An APK that only works on x86 devices
 * The advantage is the size of the APK is reduced by about 4MB.
 * Upload all the APKs to the Play Store and people will download
 * the correct one based on the CPU architecture of their device.
 */
 def enableSeparateBuildPerCPUArchitecture = false

  /**
 * Run Proguard to shrink the Java bytecode in release builds.
 */
 def enableProguardInReleaseBuilds = false

android {
    compileSdkVersion 26
    buildToolsVersion "25.0.2"

defaultConfig {
    applicationId "com.slimnative"
    minSdkVersion 16
    targetSdkVersion 26
    versionCode 1
    versionName "1.0"
    ndk {
        abiFilters "armeabi-v7a", "x86"
    }
}
splits {
    abi {
        reset()
        enable enableSeparateBuildPerCPUArchitecture
        universalApk false  // If true, also generate a universal APK
        include "armeabi-v7a", "x86"
    }
}
buildTypes {
    release {
        minifyEnabled enableProguardInReleaseBuilds
        proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
    }
}
// applicationVariants are e.g. debug, release
applicationVariants.all { variant ->
    variant.outputs.each { output ->
        // For each separate APK per architecture, set a unique version code as described here:
        // http://tools.android.com/tech-docs/new-build-system/user-guide/apk-splits
        def versionCodes = ["armeabi-v7a":1, "x86":2]
        def abi = output.getFilter(OutputFile.ABI)
        if (abi != null) {  // null for the universal-debug, universal-release variants
            output.versionCodeOverride =
                    versionCodes.get(abi) * 1048576 + defaultConfig.versionCode
        }
    }
    }
   }

dependencies {
compile fileTree(dir: "libs", include: ["*.jar"])
compile "com.android.support:appcompat-v7:23.0.1"
compile "com.facebook.react:react-native:+"  // From node_modules
compile project(':WebRTCModule')
compile project(':react-native-svg')
compile (project(':react-native-camera')) {
    // exclude group: "com.google.android.gms"
    exclude group: "com.android.support"
}
// compile ("com.google.android.gms:play-services-vision:10.2.0") {
//     force = true;
// }
compile ('com.android.support:exifinterface:26.0.1') {
    force = true;
}
}

// Run this once to be able to run the application with BUCK
// puts all compile dependencies into folder libs for BUCK to use
task copyDownloadableDepsToLibs(type: Copy) {
from configurations.compile
into 'libs'
}

还有我的 android/build.gradle:

buildscript {
repositories {
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:2.2.3'
    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}
}

allprojects {
repositories {
    mavenLocal()
    jcenter()
    maven {
        // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
        url "$rootDir/../node_modules/react-native/android"
    }
    maven { url "https://jitpack.io" }
    maven {
        url "https://maven.google.com"
    }
   }
   }

Answer 1

嘿@mraaron 我刚刚制作了一个 react 原生应用程序，我必须在其中制作和上传视频，基本上你可以使用两种方法:

1) React Native Image Picker https://github.com/react-community/react-native-image-picker which opens up the native camera to record videos and in response will give u the path and other info. This module has both functionality of images and videos while defining options u can specify mediaType: 'photo', 'video', or 'mixed' on iOS, 'photo' or 'video' on Android

.

2) React Native Camera https://github.com/react-native-community/react-native-camera in this u can customise the camera window as it does not open the native camera app

Note:- I have implemented both the packages and both are working absolutely fine in android as well as ios, if u need any help u can ping me up.