我是一種新手webOS開發人員,我目前正在開發一個應用程序,其中我需要爲某個用戶拍攝 的照片。如何使用Enyo(webOS)中的MediaCapture拍照?
我一直在尋找 互聯網上的許多資源和網站,但我找不到解決我的問題。
我跟這裏列出的指示:
How to take a picture using command line on webOS on HP touchpad?
我想讓清楚,我不想拿在命令行的照片。
我試過如下:
A.在我depends.js包括
"$enyo/../lib/mediacapture/"
B.在我的場景
enyo.kind({
name: "MyComponent",
kind: "Pane",
components: [
{
kind: "enyo.MediaCapture",
name: "mediaCapture",
onInitialized: "onImageCaptureInitialized",
onError: "onImageCaptureError",
onImageCaptureComplete: "onImageCaptureComplete"
}
],
...
..
.
});
C.在裏面的onCreate功能
create: function() {
this.inherited(arguments);
this.$.mediaCapture.initialize(this.$.ViewPort);
},
D.裏面的onInitialized事件
onImageCaptureInitialized: function() {
var keyString;
for(var i = 0; i < this.pb.deviceKeys.length; i++) {
if(this.pb.deviceKeys[i].description.indexOf("Camera/Camcorder") >= 0) {
keyString = this.pb.deviceKeys[i].deviceUri;
break;
}
}
if(keyString) {
var formatObj = {imageCaptureFormat: this.pb[keyString].supportedImageFormats[0]};
this.$.mediaCapture.load(keyString, formatObj);
}
},
D.內部的某一按鈕的onclick事件
takePhotoClickEvent: function (inSender) {
this.$.mediaCapture.startImageCapture("/media/internal/CanalCocina/recipe_photo.jpg",
{
"bitrate":128000,
"samplerate":8000,
"width":480,
"height":320,
"mimetype":"image/jpeg",
"codecs":"jpeg"}
);
},
當我運行在惠普TouchPad我的應用獲取我的控制檯中的下一個日誌:
info: MediaCapture::ServiceProxy ===== MediaCapture::_initializeMediaServerInstanceSuccess() ...palm://com.palm.mediad.MediaCaptureV3_1814440/, /usr/palm/frameworks/enyo/1.0/framework/lib/mediacapture/helper/MediaCaptureProxyHelper.js:83 [20111017-16:52:32.906482] info: MediaCapture::ServiceProxy @@@@@@----------- FIRST PROPERTY GRAB [email protected]@@@@@, /usr/palm/frameworks/enyo/1.0/framework/lib/mediacapture/helper/MediaCaptureProxyHelper.js:106 [20111017-16:52:32.913991] info: MediaCapture::ServiceProxy inResponse: {"propertyValues":[{"name":"ready","value":false},{"name":"supportedAudioFormats","value":[{"bitrate":128000,"samplerate":8000,"width":0,"height":0,"mimetype":"audio/vnd.wave","codecs":"1"},{"bitrate":256000,"samplerate":16000,"width":0,"height":0,"mimetype":"audio/vnd.wave","codecs":"1"},{"bitrate":705600,"samplerate":44100,"width":0,"height":0,"mimetype":"audio/vnd.wave","codecs":"1"},{"bitrate":128000,"samplerate":8000,"width":0,"height":0,"mimetype":"audio/vnd.wave","codecs":"1"},{"bitrate":256000,"samplerate":16000,"width":0,"height":0,"mimetype":"audio/vnd.wave","codecs":"1"},{"bitrate":705600,"samplerate":44100,"width":0,"height":0,"mimetype":"audio/vnd.wave","codecs":"1"},{"bitrate":128000,"samplerate":8000,"width":0,"height":0,"mimetype":"audio/vnd.wave","codecs":"1"},{"bitrate":256000,"samplerate":16000,"width":0,"height":0,"mimetype":"audio/vnd.wave","codecs":"1"},{"bitrate":705600,"sampl
然而,當應用程序試圖加載mediaCapture對象,我得到:
Uncaught TypeError: Cannot read property 'deviceKeys' of undefined, source/CCRecipesStep1View.js:186
我知道,我明白,這個錯誤是因爲應用程序試圖訪問一個不存在的屬性。在這種情況下 的具體路線是:
onImageCaptureInitialized: function() {
var keyString;
for(var i = 0; i < this.pb.deviceKeys.length; i++) <<------------ Here
...
..
.
}
文件MediaCapture.js於是我跟着說說「屬性包」的指示,我明白,這是你聲明的屬性,但是我不我不知道 如何獲取我需要加載MediaCaptureObject的設備密鑰。
當按下按鈕,我得到:
MediaCapture::ServiceProxy #######----------- CHANGE PROPERTIES EVENT -----------######vuData , /usr/palm/frameworks/enyo/1.0/framework/lib/mediacapture/helper/MediaCaptureProxyHelper.js:140 [20111017-17:07:35.401836] info: MediaCapture::ServiceProxy
#----------- CHANGE PROPERTIES EVENT -----------######vuData ,/usr/palm/frameworks/enyo/1.0/framework/lib/mediacapture/helper/MediaCaptureProxyHelper.js:140 [20111017-17:07:35.653586] info: MediaCapture::ServiceProxy
#----------- CHANGE PROPERTIES EVENT -----------######vuData ,/usr/palm/frameworks/enyo/1.0/framework/lib/mediacapture/helper/MediaCaptureProxyHelper.js:140 [20111017-17:07:35.885940] info: MediaCapture::ServiceProxy
#----------- CHANGE PROPERTIES EVENT -----------######vuData ,/usr/palm/frameworks/enyo/1.0/framework/lib/mediacapture/helper/MediaCaptureProxyHelper.js:140
並開始一個無限循環:S
我希望你CAL幫助我。 這個應用程序非常重要。
謝謝。
是的,實際上發佈是3天或4天前。在webOS 3.0.2相機不可用。我會盡早編輯我的問題。謝謝。 – vicsonic