Possible Duplicate:
How to control volume in android?
How to show Android system volume control programmatically? As if the physical volume+/- button is pressed.
On Android 4.x
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):
问题:
回答1:
Try setStreamVolume() method. There are a lot of options available, check this link: http://developer.android.com/reference/android/media/AudioManager.html#FLAG_SHOW_UI
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