通过HTML5< video>访问Android设备的相机。通过CodeName一个移动应用程序的元素 [英] Accessing an Android device's Camera through the HTML5 <video> element through CodeName One mobile app
问题描述
我们正在使用CodeName One构建适用于Android的移动应用。作为要求的一部分，我们已经有一个HTML5页面，其中包含一个视频元素，可使用设备的相机捕获照片。我们需要从CodeName One应用程序中调用此HTML5页面。但是此代码无法按预期运行，但是直接从chrome浏览器调用时，html文件URL可以正常工作。从chrome浏览器查看时，出现提示询问相机许可的提示，如CodeName One应用中的我未看到许可提示。
We're building a mobile app for Android using CodeName One. As part of our requirement, we already have an HTML5 page that contains a video element to use a device's camera for capturing photos. We need to call this HTML5 page from within our CodeName One app. But this code is not working as per the expectations, however the html file URL is working perfectly fine when called directly from chrome browser. When viewed from the chrome browser I get the prompt for asking camera permission where as in CodeName One app I don't see the permission prompt.
我看到了类似的问题最近
html视频控件不是在Android的codenameone应用程序中工作
I saw a similar question posted recently html video control is not working in codenameone app for android
我已经尝试过那里给出的建议，但对我来说却没有用。
I've tried the recommendations given there, but it hasn't worked for me. Maybe something wrong that I'm doing here?
在我的CodeName一个类中，我有以下代码。该代码基本上创建了一个新的BrowserComponent并在该组件中设置了camera1.html URL。 camera1.html包含HTML5代码，该代码显示用于拍照的视频元素。
`
In my CodeName one class, I have the following code. The code basically creates a new BrowserComponent and sets the camera1.html URL in this component. The camera1.html contains HTML5 code that displays the video element for taking pictures. `
private Form current;
private Resources theme;
public void init(Object context) {
theme = UIManager.initFirstTheme("/theme");
// Enable Toolbar on all Forms by default
Toolbar.setGlobalToolbar(true);
}
public void start(){
if(current != null) {
current.show();
return;
}
Form f = new Form("Camera", new BorderLayout());
try {
CN1NativeCameraInterface cnci = NativeLookup.create(CN1NativeCameraInterface.class);
if (cnci != null && cnci.isSupported()) {
boolean cameraPerm = cnci.promptCameraPermission();
if (cameraPerm) {
f.setTitle("Camera Permission true");
}
}
BrowserComponent browser = new BrowserComponent();
browser.setURL("https://8c10ec77.ngrok.io/app/camera1.html");
f.add(BorderLayout.CENTER, browser);
}
catch (Exception ex) {
ex.printStackTrace();
}
finally {
f.show();
}
}
public void stop(){
current = Display.getInstance().getCurrent();
}
public void destroy(){
}
`
我定义了一个看起来像这样的本机接口
` I have defined a native interface that looks like this
public interface CN1NativeCameraInterface extends NativeInterface {
public boolean promptCameraPermission();
}
在CodeName One中为该接口以及Android的实现生成了本机访问代码如下
Generated the native access code for this interface in CodeName One and the implementation for Android is as follows
import com.codename1.impl.android.AndroidImplementation;
import android.Manifest;
public class CN1NativeCameraInterfaceImpl {
public boolean promptCameraPermission() {
return AndroidImplementation.checkForPermission(Manifest.permission.CAMERA, "This is required to take a picture");
}
public boolean isSupported() {
return true;
}
}
当我在Android上运行时设备，我可以看到HTML页面正在加载，但是video元素没有加载，我所看到的只是video元素的占位符。
该应用程序也不请求相机许可，这是另一个相关问题中提出的建议。
When I run this on an Android device, I can see the HTML page getting loaded, but the video element doesn't load, All I see is the placeholder for the video element. The app does not ask for camera permission either, something that was suggested in the other related question.
我在这里做错了什么？
What am I doing wrong here?
更新1：
我在从中获取的日志中看到以下错误使用
adb shell logcat --pid = $（pidof -s com.codename1）命令的设备：
I see the following errors in the log obtained from the device using the adb shell "logcat --pid=$(pidof -s com.codename1)" command:
Error1-
09-06 11：48：42.530 10172 10202 I WebViewFactory：正在加载com.android.chrome版本69.0.3497.76（代码349707652）
09-06 11：48：42.595 10172 10202我zygote64：拒绝对先前失败的类java.lang.Class进行重新初始化：java.lang.NoClassDefFoundError：无法解决以下问题：Landroid / webkit / TracingController;
09-06 11：48：42.595 10172 10202我zygote64：在java.lang.Class java.lang.Class.classForName（java.lang.String，boolean，java.lang.ClassLoader）（Class.java： -2）
09-06 11：48：42.595 10172 10202我zygote64：at java.lang.Class java.lang.Class.forName（java.lang.String，boolean，java.lang.ClassLoader）（Class .java：453）
09-06 11：48：42.595 10172 10202我zygote64：at java.lang.Class android.webkit.WebViewFactory.getWebViewProviderClass（java.lang.ClassLoader）（WebViewFactory.java:151）
09-06 11：48：42.595 10172 10202我zygote64：at java.lang.Class android.webkit.WebViewFactory.getProviderClass（）（WebViewFactory.java:472）
09-06 11：48：42.595 10172 10202我zygote64：在android.webkit.WebViewFactoryProvider android.webkit.WebViewFactory.getProvider（）（WebViewFactory.java:212）
09-06 11：48：42.595 10172 10202我zygote64：在android.webkit.CookieManager android.webkit.CookieManager.getInstance（）（CookieManager.java:39）
09-06 11：48：42.595 10172 10202我zygote64：在android.webkit.CookieManager com.codename1.impl.android.AndroidImplementation.getCookieManager（）（AndroidImplementation.java:4511）
09-06 11：48：42.595 10172 10202我zygote64：在java.util.Vector com .codename1.impl.android.AndroidImplementation.getCookiesForURL（java.lang.String）（AndroidImplementation.java:4528）
09-06 11：48：42.595 10172 10202我zygote64：无效com.codename1.io.ConnectionRequest .performOperation（）（ConnectionRequest.java:633）
09-06 11：48：42.595 10172 10202我zygote64：at com.codename1.io.NetworkManager $ NetworkThread.run（）（NetworkManager.java:282）
09-06 11：48：42.595 10172 10202我zygote64：at无效com.codename1.impl.CodenameOneThread $ 1.run（）（CodenameOneThread.java:60）
09-06 11：48：42.595 10172 10202我zygote64：at void java.lang.Thread.run（）（Thread.java:764）
09-06 11：48：42.595 10172 10202我zygote64：原因：java.lang.ClassNotFoundException：Didn在路径：DexPathList [[zip]中找不到类 android.webkit.TracingController文件 /data/app/com.android.chrome-fq476TNc_btk-Vb0sBbuyw==/base.apk],nativeLibraryDirectories=[/data/app/com.android.chrome-fq476TNc_btk-Vb0sBbuyw==/lib/arm64，/数据/app/com.android.chrome-fq476TNc_btk-Vb0sBbuyw==/base.apk!/lib/arm64-v8a、/system/lib64、/system/vendor/lib64]]
09-06 11:48 ：42.595 10172 10202我zygote64：at java.lang.Class dalvik.system.BaseDexClassLoader.findClass（java.lang.String）（BaseDexClassLoader.java:93）
09-06 11：48：42.595 10172 10202我zygote64 ：在java.lang.Class java.lang.ClassLoader.loadClass（java.lang.String，boolean）（ClassLoader.java:379）
09-06 11：48：42.595 10172 10202我zygote64：在java。 lang.Class java.lang.ClassLoader.loadClass（java.lang.String）（ClassLoader.java:312）
09-06 11：48：42.595 10172 10202我zygote64：at java.lang.Class java.lang .Class.classForName（java.lang.String，boolean，java.lang.ClassLoader）（Class.java:-2）
09-06 11：48：42.595 10172 10202我zygote64：在java.lang.Class java.lang.Class.forName（java.lang.S tring，boolean，java.lang.ClassLoader）（Class.java:453）
09-06 11：48：42.595 10172 10202我zygote64：位于java.lang.Class android.webkit.WebViewFactory.getWebViewProviderClass（java。 lang.ClassLoader）（WebViewFactory.java:151）
09-06 11：48：42.595 10172 10202我zygote64：在java.lang.Class android.webkit.WebViewFactory.getProviderClass（）（WebViewFactory.java:472）
09-06 11：48：42.595 10172 10202我zygote64：在android.webkit.WebViewFactoryProvider android.webkit.WebViewFactory.getProvider（）（WebViewFactory.java:212）
09-06 11:48： 42.595 10172 10202我zygote64：在android.webkit.CookieManager android.webkit.CookieManager.getInstance（）（CookieManager.java:39）
09-06 11：48：42.595 10172 10202我zygote64：在android.webkit。 CookieManager com.codename1.impl.android.AndroidImplementation.getCookieManager（）（AndroidImplementation.java:4511）
09-06 11：48：42.595 10172 10202我zygote64：在java.util.Vector com.codename1.impl。 android.AndroidImplementation.getCookiesForUR L（java.lang.String）（AndroidImplementation.java:4528）
09-06 11：48：42.595 10172 10202我zygote64：at com.codename1.io.ConnectionRequest.performOperation（）（ConnectionRequest.java： 633）
09-06 11:48:42.530 10172 10202 I WebViewFactory: Loading com.android.chrome version 69.0.3497.76 (code 349707652) 09-06 11:48:42.595 10172 10202 I zygote64: Rejecting re-init on previously-failed class java.lang.Class: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/webkit/TracingController; 09-06 11:48:42.595 10172 10202 I zygote64: at java.lang.Class java.lang.Class.classForName(java.lang.String, boolean, java.lang.ClassLoader) (Class.java:-2) 09-06 11:48:42.595 10172 10202 I zygote64: at java.lang.Class java.lang.Class.forName(java.lang.String, boolean, java.lang.ClassLoader) (Class.java:453) 09-06 11:48:42.595 10172 10202 I zygote64: at java.lang.Class android.webkit.WebViewFactory.getWebViewProviderClass(java.lang.ClassLoader) (WebViewFactory.java:151) 09-06 11:48:42.595 10172 10202 I zygote64: at java.lang.Class android.webkit.WebViewFactory.getProviderClass() (WebViewFactory.java:472) 09-06 11:48:42.595 10172 10202 I zygote64: at android.webkit.WebViewFactoryProvider android.webkit.WebViewFactory.getProvider() (WebViewFactory.java:212) 09-06 11:48:42.595 10172 10202 I zygote64: at android.webkit.CookieManager android.webkit.CookieManager.getInstance() (CookieManager.java:39) 09-06 11:48:42.595 10172 10202 I zygote64: at android.webkit.CookieManager com.codename1.impl.android.AndroidImplementation.getCookieManager() (AndroidImplementation.java:4511) 09-06 11:48:42.595 10172 10202 I zygote64: at java.util.Vector com.codename1.impl.android.AndroidImplementation.getCookiesForURL(java.lang.String) (AndroidImplementation.java:4528) 09-06 11:48:42.595 10172 10202 I zygote64: at void com.codename1.io.ConnectionRequest.performOperation() (ConnectionRequest.java:633) 09-06 11:48:42.595 10172 10202 I zygote64: at void com.codename1.io.NetworkManager$NetworkThread.run() (NetworkManager.java:282) 09-06 11:48:42.595 10172 10202 I zygote64: at void com.codename1.impl.CodenameOneThread$1.run() (CodenameOneThread.java:60) 09-06 11:48:42.595 10172 10202 I zygote64: at void java.lang.Thread.run() (Thread.java:764) 09-06 11:48:42.595 10172 10202 I zygote64: Caused by: java.lang.ClassNotFoundException: Didn't find class "android.webkit.TracingController" on path: DexPathList[[zip file "/data/app/com.android.chrome-fq476TNc_btk-Vb0sBbuyw==/base.apk"],nativeLibraryDirectories=[/data/app/com.android.chrome-fq476TNc_btk-Vb0sBbuyw==/lib/arm64, /data/app/com.android.chrome-fq476TNc_btk-Vb0sBbuyw==/base.apk!/lib/arm64-v8a, /system/lib64, /system/vendor/lib64]] 09-06 11:48:42.595 10172 10202 I zygote64: at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:93) 09-06 11:48:42.595 10172 10202 I zygote64: at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:379) 09-06 11:48:42.595 10172 10202 I zygote64: at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312) 09-06 11:48:42.595 10172 10202 I zygote64: at java.lang.Class java.lang.Class.classForName(java.lang.String, boolean, java.lang.ClassLoader) (Class.java:-2) 09-06 11:48:42.595 10172 10202 I zygote64: at java.lang.Class java.lang.Class.forName(java.lang.String, boolean, java.lang.ClassLoader) (Class.java:453) 09-06 11:48:42.595 10172 10202 I zygote64: at java.lang.Class android.webkit.WebViewFactory.getWebViewProviderClass(java.lang.ClassLoader) (WebViewFactory.java:151) 09-06 11:48:42.595 10172 10202 I zygote64: at java.lang.Class android.webkit.WebViewFactory.getProviderClass() (WebViewFactory.java:472) 09-06 11:48:42.595 10172 10202 I zygote64: at android.webkit.WebViewFactoryProvider android.webkit.WebViewFactory.getProvider() (WebViewFactory.java:212) 09-06 11:48:42.595 10172 10202 I zygote64: at android.webkit.CookieManager android.webkit.CookieManager.getInstance() (CookieManager.java:39) 09-06 11:48:42.595 10172 10202 I zygote64: at android.webkit.CookieManager com.codename1.impl.android.AndroidImplementation.getCookieManager() (AndroidImplementation.java:4511) 09-06 11:48:42.595 10172 10202 I zygote64: at java.util.Vector com.codename1.impl.android.AndroidImplementation.getCookiesForURL(java.lang.String) (AndroidImplementation.java:4528) 09-06 11:48:42.595 10172 10202 I zygote64: at void com.codename1.io.ConnectionRequest.performOperation() (ConnectionRequest.java:633)
错误2-
09-06 11：48：44.506 10172 10266 W视频功能：无法识别的配置文件2130706433 for video / avc
09-06 11：48：44.506 10172 10266 W VideoCapabilities：无法识别的配置文件2130706434 for video / avc
09-06 11：48：44.536 10172 10266 W VideoCapabilities：无法识别的配置文件2130706433 for video / avc
09-06 11：48：44.536 10172 10266 W VideoCapabilities：视频/ avc
09-06 11：48：44.542 10172 10266 W VideoCapabilities：无法识别的Profile 2130706433视频/ avc
09-06 11：48：44.542 10172 10266 W VideoCapabilities：无法识别的配置文件2130706434 for video / avc
09-06 11：48：44.551 10172 10266 W VideoCapabilities：无法识别的配置文件/ 0/3级video / mpeg2
09-06 11：48：44.555 10172 10266 W Vide oCapabilities：无法识别的配置文件/视频/ mpeg2
0/3级
09-06 11：48：44.564 10172 10266 W VideoCapabilities：不支持的mime video / x-ms-wmv
09-06 11:48： 44.568 10172 10266 W VideoCapabilities：不支持的mime video / x-ms-wmv
09-06 11：48：44.574 10172 10266 W VideoCapabilities：不支持的mime video / divx
09-06 11：48：44.577 10172 10177 I zygote64：执行部分代码缓存收集，代码= 55KB，数据= 56KB
09-06 11：48：44.580 10172 10266 W VideoCapabilities：不支持的mime video / divx311
09-06 11:48： 44.584 10172 10266 W VideoCapabilities：不支持的mime video / divx4
09-06 11：48：44.585 10172 10177 I zygote64：收集代码缓存后，代码= 55KB，数据= 56KB
09-06 11:48 ：44.585 10172 10177 I zygote64：将代码缓存容量增加到256KB
09-06 11：48：44.605 10172 10266 W VideoCapabilities：不支持的mime video / mp4v-esdp
09-06 11：48：44.633 10172 10266 I VideoCapabilities：视频/ mp4v-es
不支持的配置文件4 09-06 11：48：44.867 1 0172 10282 W cr_CrashFileManager：/data/user/0/com.codename1/cache/WebView/Crash报告不存在或不是目录
09-06 11:48:44.506 10172 10266 W VideoCapabilities: Unrecognized profile 2130706433 for video/avc 09-06 11:48:44.506 10172 10266 W VideoCapabilities: Unrecognized profile 2130706434 for video/avc 09-06 11:48:44.536 10172 10266 W VideoCapabilities: Unrecognized profile 2130706433 for video/avc 09-06 11:48:44.536 10172 10266 W VideoCapabilities: Unrecognized profile 2130706434 for video/avc 09-06 11:48:44.542 10172 10266 W VideoCapabilities: Unrecognized profile 2130706433 for video/avc 09-06 11:48:44.542 10172 10266 W VideoCapabilities: Unrecognized profile 2130706434 for video/avc 09-06 11:48:44.551 10172 10266 W VideoCapabilities: Unrecognized profile/level 0/3 for video/mpeg2 09-06 11:48:44.555 10172 10266 W VideoCapabilities: Unrecognized profile/level 0/3 for video/mpeg2 09-06 11:48:44.564 10172 10266 W VideoCapabilities: Unsupported mime video/x-ms-wmv 09-06 11:48:44.568 10172 10266 W VideoCapabilities: Unsupported mime video/x-ms-wmv 09-06 11:48:44.574 10172 10266 W VideoCapabilities: Unsupported mime video/divx 09-06 11:48:44.577 10172 10177 I zygote64: Do partial code cache collection, code=55KB, data=56KB 09-06 11:48:44.580 10172 10266 W VideoCapabilities: Unsupported mime video/divx311 09-06 11:48:44.584 10172 10266 W VideoCapabilities: Unsupported mime video/divx4 09-06 11:48:44.585 10172 10177 I zygote64: After code cache collection, code=55KB, data=56KB 09-06 11:48:44.585 10172 10177 I zygote64: Increasing code cache capacity to 256KB 09-06 11:48:44.605 10172 10266 W VideoCapabilities: Unsupported mime video/mp4v-esdp 09-06 11:48:44.633 10172 10266 I VideoCapabilities: Unsupported profile 4 for video/mp4v-es 09-06 11:48:44.867 10172 10282 W cr_CrashFileManager: /data/user/0/com.codename1/cache/WebView/Crash Reports does not exist or is not a directory
错误3-
09-06 11：48：47.715 10172 10253 I CameraManagerGlobal：连接到摄像头服务
09-06 11：48：47.799 10172 10172 D代号一：onPermissionRequest
09-06 11：48：50.952 10172 10172 E AndroidImplementation：空
09-06 11：48：50.952 10172 10172 E AndroidImplementation：java.io.FileNotFoundException：/data/user/0/com.codename1 / files / CN1 $ AndroidServiceProperties（没有此类文件或目录）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：at java.io.FileInputStream.open0（Native Method）
09-06 11 ：48：50.952 10172 10172 E AndroidImplementation：在java.io.FileInputStream.open（FileInputStream.java:200）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：在java.io.FileInputStream。（FileInputStream .java：150）
09-06 11：48：50.952 10172 10172 E AndroidImplementati on：位于android.app.ContextImpl.openFileInput（ContextImpl.java:515）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：位于android.content.ContextWrapper.openFileInput（ContextWrapper.java:190）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：at com.codename1.impl.android.AndroidImplementation.getServiceProperties（AndroidImplementation.java:6081）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：位于com.codename1.impl.android.AndroidImplementation.writeServiceProperties（AndroidImplementation.java:6107）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：位于com.codename1.CameraDemoStub.onStop（CameraDemoStub.java ：166）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：位于android.app.Instrumentation.callActivityOnStop（Instrumentation.java:1486）
09-06 11：48：50.952 10172 10172 E Android实施：位于android.app.Activity.performStop（Activity.java:7178）
09-06 11：48：50.952 101 72 10172 E AndroidImplementation：位于android.app.ActivityThread.performStopActivityInner（ActivityThread.java:4274）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：位于android.app.ActivityThread.handleStopActivity（ActivityThread.java： 4333）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：at android.app.ActivityThread.-wrap24（Unknown Source：0）
09-06 11：48：50.952 10172 10172 E AndroidImplementation ：位于android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1722）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：位于android.os.Handler.dispatchMessage（Handler.java:105）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：at android.os.Looper.loop（Looper.java:164）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：at android.app.ActivityThread.main（ActivityThread.java:6798）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：at java.lang.reflect.Method.inv oke（本机方法）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：at com.android.internal.os.Zygote $ MethodAndArgsCaller.run（Zygote.java:240）
09-06 11：48：50.952 10172 10172 E AndroidImplementation：位于com.android.internal.os.ZygoteInit.main（ZygoteInit.java:767）
09-06 11:48:47.715 10172 10253 I CameraManagerGlobal: Connecting to camera service 09-06 11:48:47.799 10172 10172 D Codename One: onPermissionRequest 09-06 11:48:50.952 10172 10172 E AndroidImplementation: null 09-06 11:48:50.952 10172 10172 E AndroidImplementation: java.io.FileNotFoundException: /data/user/0/com.codename1/files/CN1$AndroidServiceProperties (No such file or directory) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at java.io.FileInputStream.open0(Native Method) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at java.io.FileInputStream.open(FileInputStream.java:200) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at java.io.FileInputStream.(FileInputStream.java:150) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at android.app.ContextImpl.openFileInput(ContextImpl.java:515) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at android.content.ContextWrapper.openFileInput(ContextWrapper.java:190) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at com.codename1.impl.android.AndroidImplementation.getServiceProperties(AndroidImplementation.java:6081) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at com.codename1.impl.android.AndroidImplementation.writeServiceProperties(AndroidImplementation.java:6107) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at com.codename1.CameraDemoStub.onStop(CameraDemoStub.java:166) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at android.app.Instrumentation.callActivityOnStop(Instrumentation.java:1486) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at android.app.Activity.performStop(Activity.java:7178) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:4274) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at android.app.ActivityThread.handleStopActivity(ActivityThread.java:4333) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at android.app.ActivityThread.-wrap24(Unknown Source:0) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1722) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at android.os.Handler.dispatchMessage(Handler.java:105) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at android.os.Looper.loop(Looper.java:164) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at android.app.ActivityThread.main(ActivityThread.java:6798) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at java.lang.reflect.Method.invoke(Native Method) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 09-06 11:48:50.952 10172 10172 E AndroidImplementation: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
错误4-
09-06 11：48：51.005 10172 10172 D CameraDemo：[main] 0：0：0,3-[LOG]发生以下错误：NotAllowedError：权限被拒绝在线55个 https://8319bf05.ngrok.io/ventasys/venta/code/ camera1.html
09-06 11:48:51.005 10172 10172 D CameraDemo: [main] 0:0:0,3 - [LOG] The following error occured: NotAllowedError: Permission denied On line 55 of https://8319bf05.ngrok.io/ventasys/venta/code/camera1.html
上述错误（错误4）来自从CodeName One调用的.html。
这是HTML的代码：
This above error (Error 4) is coming out of the .html that is called from CodeName One. Here's the code for HTML:
<!DOCTYPE HTML>
<html>
<head>
<script>
function copyPhoto() {
var imgName;
imgName = getParamValues("imgNm");
window.opener.document.getElementById(imgName).src = document.getElementById("theimage1").src;
window.close();
}
function getParamValues(paramNm) {
var qstring = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
for (var i = 0; i < qstring.length; i++) {
var urlparam = qstring[i].split('=');
if (urlparam[0] == paramNm) {
return urlparam[1];
}
}
}
function snapshot() {
var canvas = document.getElementById("thecanvas");
var ctx = canvas.getContext("2d");
//var constraints = { video: { facingMode: "user" }, audio: false };
//var constraints = {
// video: {
// width: { min: 640, ideal: 1920 },
// height: { min: 400, ideal: 1080 },
// aspectRatio: { ideal: 1.7777777778 },
// facingMode: "environment"
// },
// audio: false
//};
var constraints = {
video: { facingMode: "user" },
audio: false
};
try {
navigator.mediaDevices.getUserMedia(constraints).then(
// successCallback
function (localMediaStream) {
document.getElementById("mylog").innerHTML = document.getElementById("mylog").innerHTML + '1.3 ';
video = document.querySelector('video');
video.srcObject = localMediaStream;
})
.catch(function (err) {
console.log("The following error occured: " + err);
document.getElementById("mylog").innerHTML = document.getElementById("mylog").innerHTML + ' <br> 5 Err' + err;
});
}
catch (e)
{
document.getElementById("mylog").innerHTML = document.getElementById("mylog").innerHTML + ' 6 catch ##** ' + e;
}
document.getElementById("mylog").innerHTML = document.getElementById("mylog").innerHTML + '10 ';
canvas.width = 640;
canvas.height = video.videoHeight / (video.videoWidth / canvas.width);
// Draws current image from the video element into the canvas
//ctx.drawImage(video, 0,0, video.videoWidth, video.videoHeight);
ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
var canvas = document.getElementById("thecanvas");
var dataUrl = canvas.toDataURL('image/jpeg', 0.6);
}
</script>
</head>
<body onload="snapshot();">
<div id='mylog'></div>
<p><video id="video" controls autoplay></video></p>
<p><button onclick="snapshot();">Take Snapshot</button></p>
<div id='item' hidden>
<p><canvas id="thecanvas"></canvas></p>
</div>
<p><image id="theimage1"></image></p>
<p><button onclick="copyPhoto()">Done</button></p>
<p><button onclick="copyPhoto()">Reload</button></p>
</body>
</html>
推荐答案
尝试将其添加到您的 init（Object）方法：
Try adding this to your init(Object) method:
Display.getInstance().setProperty("android.WebView.grantPermissionsFrom", url_of_your_video_page);
您可以添加多个以空格分隔的URL。如果这不起作用，我们可能还需要其他东西。
You can add multiple URL's separated by spaces. If this doesn't work we might need something else.
这篇关于通过HTML5< video>访问Android设备的相机。通过CodeName一个移动应用程序的元素的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
