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MID Profile: Interface VolumeControl
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javax.microedition.media.control</FONT>
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Interface VolumeControl</H2>
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<DT><B>All Superinterfaces:</B> <DD><A HREF="../../../../javax/microedition/media/Control.html">Control</A></DD>
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<DT>public interface <B>VolumeControl</B><DT>extends <A HREF="../../../../javax/microedition/media/Control.html">Control</A></DL>
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<code>VolumeControl</code> is an interface for manipulating the audio volume of a <code>Player</code>. <h3>Volume Settings</h3> This interface allows the output volume to be specified using an integer value that varies between 0 and 100.<h4>Specifying Volume in the Level Scale</h4> The level scale specifies volume in a linear scale. It ranges from 0 to 100, where 0 represents silence and 100 represents the highest volume. The mapping for producing a linear multiplicative value is implementation dependent. <p> <h3>Mute</h3> Setting mute on or off doesn't change the volume level returned by getLevel. If mute is <CODE>true</CODE>, no audio signal is produced by this <code>Player</code>; if mute is <CODE>false</CODE> an audio signal is produced and the volume is restored. <h3>Volume Change Events</h3> When the state of the <code>VolumeControl</code> changes, a <code>VOLUME_CHANGED</code> event is delivered through the <code>PlayerListener</code>.
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<DT><B>See Also: </B><DD><A HREF="../../../../javax/microedition/media/Control.html"><CODE>Control</CODE></A>,
<A HREF="../../../../javax/microedition/media/Player.html"><CODE>Player</CODE></A>,
<A HREF="../../../../javax/microedition/media/PlayerListener.html"><CODE>PlayerListener</CODE></A></DL>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../javax/microedition/media/control/VolumeControl.html#getLevel()">getLevel</A></B>()</CODE>
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Get the current volume level set.</TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../javax/microedition/media/control/VolumeControl.html#isMuted()">isMuted</A></B>()</CODE>
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Get the mute state of the signal associated with this <code>VolumeControl</code>.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../javax/microedition/media/control/VolumeControl.html#setLevel(int)">setLevel</A></B>(int level)</CODE>
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Set the volume using a linear point scale with values between 0 and 100.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../javax/microedition/media/control/VolumeControl.html#setMute(boolean)">setMute</A></B>(boolean mute)</CODE>
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Mute or unmute the <code>Player</code> associated with this <code>VolumeControl</code>.</TD>
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<A NAME="setMute(boolean)"><!-- --></A><H3>
setMute</H3>
<PRE>
public void <B>setMute</B>(boolean mute)</PRE>
<DL>
<DD>Mute or unmute the <code>Player</code> associated with this <code>VolumeControl</code>. <p> Calling <code>setMute(true)</code> on the <code>Player</code> that is already muted is ignored, as is calling <code>setMute(false)</code> on the <code>Player</code> that is not currently muted. Setting mute on or off doesn't change the volume level returned by getLevel.</p> <p> When <code>setMute</code> results in a change in the muted state, a <code>VOLUME_CHANGED</code> event will be delivered through the <code>PlayerListener</code>.</p><DD><DL>
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<DT><B>Parameters:</B><DD><CODE>mute</CODE> - Specify <CODE>true</CODE> to mute the signal, <CODE>false</CODE> to unmute the signal.<DT><B>See Also: </B><DD><A HREF="../../../../javax/microedition/media/control/VolumeControl.html#isMuted()"><CODE>isMuted()</CODE></A></DL>
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<A NAME="isMuted()"><!-- --></A><H3>
isMuted</H3>
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public boolean <B>isMuted</B>()</PRE>
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<DD>Get the mute state of the signal associated with this <code>VolumeControl</code>.<DD><DL>
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<DD><DL>
<DT><B>Returns:</B><DD>The mute state.<DT><B>See Also: </B><DD><A HREF="../../../../javax/microedition/media/control/VolumeControl.html#setMute(boolean)"><CODE>setMute(boolean)</CODE></A></DL>
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<A NAME="setLevel(int)"><!-- --></A><H3>
setLevel</H3>
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public int <B>setLevel</B>(int level)</PRE>
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<DD>Set the volume using a linear point scale with values between 0 and 100. <br> 0 is silence; 100 is the loudest useful level that this <code>VolumeControl</code> supports. If the given level is less than 0 or greater than 100, the level will be set to 0 or 100 respectively. <br> When <code>setLevel</code> results in a change in the volume level, a <code>VOLUME_CHANGED</code> event will be delivered through the <code>PlayerListener</code>.<DD><DL>
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<DD><DL>
<DT><B>Parameters:</B><DD><CODE>level</CODE> - The new volume specified in the level scale.<DT><B>Returns:</B><DD>The level that was actually set.<DT><B>See Also: </B><DD><A HREF="../../../../javax/microedition/media/control/VolumeControl.html#getLevel()"><CODE>getLevel()</CODE></A></DL>
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<A NAME="getLevel()"><!-- --></A><H3>
getLevel</H3>
<PRE>
public int <B>getLevel</B>()</PRE>
<DL>
<DD>Get the current volume level set. <p> <code>getLevel</code> may return <code>-1</code> if and only if the <code>Player</code> is in the <i>REALIZED</i> state (the audio device has not been initialized) and <code>setLevel</code> has not yet been called.</p><DD><DL>
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<DD><DL>
<DT><B>Returns:</B><DD>The current volume level or <code>-1</code>.<DT><B>See Also: </B><DD><A HREF="../../../../javax/microedition/media/control/VolumeControl.html#setLevel(int)"><CODE>setLevel(int)</CODE></A></DL>
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<font size="-1"><a href="mailto:midp-feedback@risc.sps.mot.com">Submit a comment or suggestion</a> Version 2.0 of MID Profile Specification<br>Java is a trademark or registered trademark of Sun Microsystems, Inc. in the US and other countries. Copyright (c) 1993-2002 Sun Microsystems, Inc. 901 San Antonio Road,Palo Alto, California, 94303, U.S.A. All Rights Reserved.</font>
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