用Qt控制音量键

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Latest revision as of 13:58, 13 June 2012

Tested with

Devices(s): Nokia N97, N8

Compatibility

Platform(s): S60 5th Edition symbian

Article

Keywords: volume control

Created: flycarl (20 Oct 2010)

Last edited: hamishwillee (13 Jun 2012)

由于QT中还没有提供对音量键的响应，需要使用symbian Remote control API 控制音量键。

文件夹volumeKey中的 VolumeKey 类提供了一个VolumeKeyPressed( int )信号，

当按音量键下时有信号EVolumeDown，

当按音量键上时有信号EVolumeUp，由此可以在程序中控制音量。

使用了QtMobility的multimedia 来播放声音，在代码中设置一个手机中的歌曲名。播放后按音量键可以观察到音量变化。

20 October 2010	1st，直接参照 TSS000432 - Utilising media keys
8 November 2010	2nd，使用symbianApi播放声音，构造时设置默认音量。兼容symbian^3,S60 5th SDK

@@ Line 1: / Line 1: @@
-[[Category:Multimedia]][[Category:Qt]][[Category:Qt for Symbian]]
+[[Category:Multimedia]][[Category:Qt Mobility]]
-{{CodeSnippet
+{{ArticleMetaData
 |id=...
 |platform=S60 5th Edition symbian
 |devices=Nokia N97, N8
-|category=Qt for Symbian
+|category=Qt
 |subcategory= Qt Mobility API
 |creationdate=Oct 20, 2010
 |keywords= volume control
+|sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
+|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
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+|capabilities=<!-- Capabilities required (e.g. Location, NetworkServices.) -->
+|author=[[User:Flycarl]]
 }}
@@ Line 33: / Line 41: @@
 {| border="1"
 |20 October 2010
-|第一版，直接参照 [[TSS000432 - Utilising media keys]]
+|1st，直接参照 [[TSS000432 - Utilising media keys]]
+|-
+|8 November 2010
+|2nd，使用symbianApi播放声音，构造时设置默认音量。兼容symbian^3,S60 5th SDK
 |}
-  [[Category:Code Examples]][[Category:Lang-CN]][[Category:Audio]]
+  [[Category:Code Examples]][[Category:Lang-Chinese]][[Category:Audio]][[Category:MeeGo Harmattan]] [[Category:Symbian]]