Motorola C381P 用户手册

9
JSR 135 Mobile Media API

A tone sequence is specified as a list of non-tone duration pairs and user-defined
sequence blocks and is packaged as an array of bytes. The setSequence() method is
used to input the sequence to the ToneControl.
The following is the available method for ToneControl:

-setSequence (byte[] sequence)

: Sets the tone sequence

GUIControl

GUIControl extends control and is defined for controls that provide GUI functionalities.
USE_GUI_PRIMITIVE defines a mode on how the GUI is displayed. initializes the mode
on how the GUI is displayed.
When USE_GUI_PRIMITIVE is specified for initDisplayMode, a GUI primitive will be
returned. This object is where the GUI of this control will be displayed. It can be used in
conjunction with other GUI objects and conforms to the GUI behaviors specified.

VolumeControl

VolumeControl is an interface for manipulating the audio volume of a Player. The JSR 135
Mobile Media API will implement public interface VolumeControl.
The following describes the different volume settings found within VolumeControl:

• Volume Settings - allows the output volume to be specified using an integer

value that varies between 0 and 100.

• Specifying Volume in the Level Scale - specifies volume in a linear scale. It

ranges from 0 – 100 where 0 represents silence and 100 represents the highest
volume available.

• Mute – setting mute on or off does not change the volume level returned by the

getLevel. If mute is on, no audio signal is produced by the Player. If mute is off,
an audio signal is produced and the volume is restored.

The following is a list of available methods with regards to VoumeControl:

-getLevel: Get the current volume setting.

-isMuted: Get the mute state of the signal associated with this VolumeControl.

-setLevel (int level): Set the volume using a linear point scale with values
between 0 and 100.

-setMute (Boolean mute): Mute or unmute the Player associated with this
VolumeControl.