标签:javascript cordova jquery-mobile
我正在尝试Camera API for Phonegap,我遇到了一个问题.使用官方文档中的代码:
<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) {
// Uncomment to view the base64 encoded image data
// console.log(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 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 capturePhoto() {
// Take picture using device camera and retrieve image as base64-encoded string
navigator.camera.getPicture(onPhotoDataSuccess, onFail, { quality: 50 });
}
// A button will call this function
//
function capturePhotoEdit() {
// Take picture using device camera, allow edit, and retrieve image as base64-encoded string
navigator.camera.getPicture(onPhotoDataSuccess, onFail, { quality: 20, allowEdit: true });
}
// 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>
我的按钮:
<button onclick="capturePhoto();">Capture Photo</button>
和img标签:
<img style="display:none;width:60px;height:60px;" id="smallImage" src="" />
相机打开正常,拍照没问题,但是,它没有显示在页面上.
我有更多的代码可以让你从相册中选择一个图像,这样可以很好地工作,将它显示在不同的图像标签中.
我相信问题是它无法找到imageData.
拍摄的照片会保存到手机中,并且可以使用其他按钮显示,但我希望它在拍摄照片后直接显示.
我正在使用JQM btw并使用Phonegap:Build web编译器编译我的APK.
解决方法:
关于Phonegap的文档是错误的.要获取base64编码的图片,您需要调用
navigator.camera.getPicture(onPhotoDataSuccess, onFail, { quality:50, destinationType:Camera.DestinationType.DATA_URL });
标签:javascript,cordova,jquery-mobile 来源: https://codeday.me/bug/20190902/1790618.html
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