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用Qt控制音量键

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[[Category:Multimedia]][[Category:Qt Mobility]]
 
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Revision as of 03:37, 12 April 2011

Article Metadata
Tested with
Devices(s): Nokia N97, N8
Compatibility
Platform(s): S60 5th Edition symbian
Symbian
Article
Keywords: volume control
Created: (20 Oct 2010)
Last edited: hamishwillee (12 Apr 2011)

Overview

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。

参照Qt和Symbian C++的混合编程TSS000432 - Utilising media keys

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。


Download

File:PlayerVolumeKey.zip



History

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
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