How to Get and set the ringtones and volume of the android System

From: http://www.inandroid.cn/bbs/thread-132546-1-1.html Obtain the ringtones and volume of the Android mobile phone through a program. Similarly, you can set the ringtone and volume easily! The method for setting the volume is also very simple. audiomanager provides the method: Publicvoidsetstreamvolume (intstreamtype, intindex, intflags) Where streamtype has built-in constants, which can be seen in the document. Java code: Audiomanager maudiomanager = (audiomanager) getsystemservice (context. audio_service ); // Call volume Int max = maudiomanager. getstreammaxvolume (audiomanager. stream_voice_call ); Int current = maudiomanager. getstreamvolume (audiomanager. stream_voice_call ); Log. D ("vioce_call", "MAX:" + MAX + "current:" + current ); // System volume Max = maudiomanager. getstreammaxvolume (audiomanager. stream_system ); Current = maudiomanager. getstreamvolume (audiomanager. stream_system ); Log. D ("system", "MAX:" + MAX + "current:" + current ); // Ringtone volume Max = maudiomanager. getstreammaxvolume (audiomanager. stream_ring ); Current = maudiomanager. getstreamvolume (audiomanager. stream_ring ); Log. D ("Ring", "MAX:" + MAX + "current:" + current ); // Music volume Max = maudiomanager. getstreammaxvolume (audiomanager. stream_music ); Current = maudiomanager. getstreamvolume (audiomanager. stream_music ); Log. D ("music", "MAX:" + MAX + "current:" + current ); // Sound volume prompt Max = maudiomanager. getstreammaxvolume (audiomanager. stream_alarm ); Current = maudiomanager. getstreamvolume (audiomanager. stream_alarm ); Log. D ("alarm", "MAX:" + MAX + "current:" + current ); PS: During the game, you can only adjust the multimedia volume, but not the call volume. Setvolumecontrolstream (audiomanager. stream_music ); Black screen is not allowed because the screen remains unchanged for a long time. View. setkeepscreenon (true ); It is estimated that the permission must be registered in the manifest file.