如何从WebView中的按钮启动相机-Android [英] How to launch camera from button in webview -Android
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问题描述
如何从Webview中的按钮启动设备的相机?
How can I launch the camera of the device from a button in a Webview?
我在Android中有以下代码:
I have this code in Android:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webview = (WebView)findViewById(R.id.webView1);
webview.getSettings().setJavaScriptEnabled(true);
webview.loadUrl("file:///android_asset/camtest.html");
}
HTML文件非常简单:
And the Html file is very simple:
<html>
<body>
<form enctype="multipart/form-data" method="post">
<h2>capture=camera</h2>
<input type="file" accept="image/*;capture=camera"></input>
</form>
</body>
</html>
启动应用程序时，单击按钮
When I launch the app, and click in the button,
日志显示以下内容:
02-10 12:00:03.775: V/WebViewInputDispatcher(10110): blockWebkitDraw
02-10 12:00:03.775: V/WebViewInputDispatcher(10110): blockWebkitDraw lockedfalse
02-10 12:00:04.085: D/webview(10110): blockWebkitViewMessage= false
相机无法启动.
我想念什么?
推荐答案
，您可以使用电话差距
将活动扩展到DroidGap
然后在assets folder内创建文件夹www
然后在文件夹www中创建文件夹js，并在其中放置pu phonegap.js
then create folder www inside assets folder
and inside folder www create folder js and pu inside it phonegap.js
然后创建文件index.html:
<!DOCTYPE html>
<html>
<head>
<title>Capture Photo</title>
<meta name="viewport" content="width=device-width,height=device-height,initial-scale=1"/>
<script type="text/javascript" charset="utf-8" src="js/phonegap.js"></script>
<script type="text/javascript" charset="utf-8">
var pictureSource; // picture source
var destinationType; // sets the format of returned value
// Wait for PhoneGap to connect with the device
//
document.addEventListener("deviceready",onDeviceReady,false);
// PhoneGap is ready to be used!
//
function onDeviceReady() {
pictureSource=navigator.camera.PictureSourceType;
destinationType=navigator.camera.DestinationType;
}
// Called when a photo is successfully retrieved
//
function onPhotoDataSuccess(imageData) {
// Get image handle
//
var smallImage = document.getElementById('smallImage');
// Unhide image elements
//
smallImage.style.display = 'block';
// Show the captured photo
// The inline CSS rules are used to resize the image
//
smallImage.src = "data:image/jpeg;base64," + imageData;
}
// Called when a photo is successfully retrieved
//
function onPhotoFileSuccess(imageData) {
// Get image handle
console.log(JSON.stringify(imageData));
// Get image handle
//
var smallImage = document.getElementById('smallImage');
// Unhide image elements
//
smallImage.style.display = 'block';
// Show the captured photo
// The inline CSS rules are used to resize the image
//
smallImage.src = imageData;
}
// Called when a photo is successfully retrieved
//
function onPhotoURISuccess(imageURI) {
// Uncomment to view the image file URI
// console.log(imageURI);
// Get image handle
//
var largeImage = document.getElementById('largeImage');
// Unhide image elements
//
largeImage.style.display = 'block';
// Show the captured photo
// The inline CSS rules are used to resize the image
//
largeImage.src = imageURI;
}
// A button will call this function
//
function capturePhotoWithData() {
// Take picture using device camera and retrieve image as base64-encoded string
navigator.camera.getPicture(onPhotoDataSuccess, onFail, { quality: 50 });
}
function capturePhotoWithFile() {
navigator.camera.getPicture(onPhotoFileSuccess, onFail, { quality: 50, destinationType: Camera.DestinationType.FILE_URI });
}
// A button will call this function
//
function getPhoto(source) {
// Retrieve image file location from specified source
navigator.camera.getPicture(onPhotoURISuccess, onFail, { quality: 50,
destinationType: destinationType.FILE_URI,
sourceType: source });
}
// Called if something bad happens.
//
function onFail(message) {
alert('Failed because: ' + message);
}
</script>
</head>
<body>
<button onclick="capturePhotoWithData();">Capture Photo With Image Data</button> <br>
<button onclick="capturePhotoWithFile();">Capture Photo With Image File URI</button> <br>
<button onclick="getPhoto(pictureSource.PHOTOLIBRARY);">From Photo Library</button><br>
<button onclick="getPhoto(pictureSource.SAVEDPHOTOALBUM);">From Photo Album</button><br>
<img style="display:none;width:60px;height:60px;" id="smallImage" src="" />
<img style="display:none;" id="largeImage" src="" />
</body>
</html>
，然后您必须添加库cordova.jar
然后运行您的应用程序
这篇关于如何从WebView中的按钮启动相机-Android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！
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