我只是想运行提供的示例代码，据我所知，它应该可以正常工作。有什么我遗漏的，或者这是模拟器的限制。
如果是这样，是否有任何解决方法？
import bb.cascades 1.0
// To use the MediaPlayer, we must include
// the multimedia library.
import bb.multimedia 1.0
Page {
Container {
id: mainContainer
layout: StackLayout {
orientation: LayoutOrientation.TopToBottom
}
topPadding: 50.0
Label {
id: titleLbl
text: qsTr("SystemSound and MediaPlayer\n Sample App")
multiline: true
textStyle.fontSizeValue: 9.0
textStyle.fontWeight: FontWeight.Bold
textStyle.fontFamily: "Verdana"
textStyle.color: Color.DarkBlue
textStyle.textAlign: TextAlign.Center
horizontalAlignment: HorizontalAlignment.Center
}
// Part 1 of the sample: Playing system sounds.
Container {
id: systemSoundsContainer
layout: StackLayout {
orientation: LayoutOrientation.TopToBottom
}
topMargin: 100.0
horizontalAlignment: HorizontalAlignment.Center
DropDown {
id: soundSelectorDropdown
title: "Sound: "
maxWidth: 600.0
Option {
text: qsTr("Battery Alarm")
value: SystemSound.BatteryAlarm
selected: true
}
Option {
text: qsTr("Browser Start")
value: SystemSound.BrowserStartEvent
}
Option {
text: qsTr("Camera Shutter")
value: SystemSound.CameraShutterEvent
}
Option {
text: qsTr("Device Tether")
value: SystemSound.DeviceTetherEvent
}
Option {
text: qsTr("General Notification")
value: SystemSound.GeneralNotification
}
} // soundSelectorDropdown
Button {
id: systemSoundPlayButton
text: qsTr("Play Selected System Sound")
minWidth: 600.0
onClicked: {
systemSound.play();
}
} // systemSoundPlayButton
} // systemSoundsContainer
// Part 2 of the sample: Playing custom sound files.
Container {
id: customSoundsContainer
layout: StackLayout {
orientation: LayoutOrientation.LeftToRight
}
topMargin: 100.0
Button {
id: customSoundPlayButton1
text: qsTr("Play Sound 1")
layoutProperties: StackLayoutProperties {
spaceQuota: 1.0
}
onClicked: {
// Here we could have created a second MediaPlayer object to
// use to play our sound, but instead we programmatically
// changed the sourceUrl property of the current myPlayer
// MediaPlayer object, and re-used it to play our sounds.
myPlayer.setSourceUrl("asset:///sounds/Doorbell_001.wav")
myPlayer.play()
}
} // customSoundPlayButton1
Button {
id: customSoundPlayButton2
text: qsTr("Play Sound 2")
layoutProperties: StackLayoutProperties {
spaceQuota: 1.0
}
onClicked: {
// Same as above, here we also could have created a second
// MediaPlayer object to use to play our sound, but instead
// we programmatically changed the sourceUrl property of the
// current myPlayer MediaPlayer object, and re-used it to
// play our sounds.
myPlayer.setSourceUrl("asset:///sounds/Doorbell_002.wav")
myPlayer.play()
}
} // customSoundPlayButton2
} // customSoundsContainer
} // mainContainer
// The SystemSound and MediaPlayer objects are attached so
// they can be used in our QML code to play sounds.
attachedObjects: [
SystemSound {
id: systemSound
sound: soundSelectorDropdown.selectedValue
},
MediaPlayer {
id: myPlayer
// sourceUrl: < Set in the Button control's onClicked event handler. >
}
] // Attached objects.
}