Android 3d Game Research (1) (learn and write, thank you for your correction, bow): Sound

I wanted to learn 3d a long time ago, but I never had time. Recently, I was able to learn 3d;
Write the voice today:
There are two types of sounds in the game: Background Music and action music;
What is the difference between them: background music, which takes a long time relative to motion music. So in this way, I can cite it in two ways: normal music (background music ), pool playback (action music)

(1) pool playback:
Code implementation:

SoundPool sp; // gets a sound pool reference
HashMap <Integer, Integer> spMap; // gets a map reference.

// Initialization
Sp = new SoundPool (
5, // maxStreams parameter, which is used to set the number of sound effects that can be played at the same time
AudioManager. STREAM_MUSIC, // streamType parameter. This parameter sets the audio type, which is usually set to STREAM_MUSIC in games.
0 // srcQuality parameter, which sets the quality of the audio file. Currently, no effect is available. Set it to 0 as the default value.
);
SpMap = new HashMap <Integer, Integer> ();
SpMap. put (1, sp. load (this, R. raw. attack02, 1 ));
SpMap. put (2, sp. load (this, R. raw. attack14, 1 ));

// Play music
Public void playSound (int sound, int number) {// playback sound. The parameter sound is the id of the playback sound, and the parameter number is the number of playback sound effects.
AudioManager am = (AudioManager) this. getSystemService (this. AUDIO_SERVICE); // instantiate the AudioManager object
Float audioMaxVolumn = am. getStreamMaxVolume (AudioManager. STREAM_MUSIC); // returns the maximum volume of the current AudioManager object.
Float audioCurrentVolumn = am. getStreamVolume (AudioManager. STREAM_MUSIC); // return the volume of the current AudioManager object.
Float volumnRatio = audioCurrentVolumn/audioMaxVolumn;
Sp. play (
SpMap. get (sound), // the id of the music to be played
VolumnRatio, // left audio volume
VolumnRatio, // right-channel volume
1, // priority, 0 is the lowest
Number, // number of cycles. 0 indicates no loops, and-1 indicates no permanent loops.
1 // playback speed. The value ranges from 0.5 to 2.0. 1 indicates the normal speed.
);
}

// Event reference:
PlaySound (); // play the first sound effect, loop through it
Sp. pause (spMap. get (1); // pause the first sound effect.
Sp. stop (spMap. get (1); // stop the first sound effect.

Well, the above is a simple use of pool playback;

(2) normal playback
MediaPlayer mp; // MediaPlayer reference
AudioManager am; // AudioManager reference

// Initialize the audio
Mp = new MediaPlayer ();

// Required before the first playback
Try {
Mp. setDataSource ("/sdcard/dl. mid"); // load the audio and enter the Initialized status.
} Catch (Exception e) {e. printStackTrace ();}
Try {
Mp. prepare (); // enter the prepared status.
} Catch (Exception e) {e. printStackTrace ();}

// Event reference: www.2cto.com
Mp. start (); // play music
Mp. pause (); // pause music
Mp. stop (); // stop music

// Mp. isPlaying (); // determines whether the video is in the playing status.

// Initialize the volume
Am = (AudioManager) this. getSystemService (this. AUDIO_SERVICE );
Am. adjustVolume (AudioManager. ADJUST_RAISE, 0); // increase the volume
Am. adjustVolume (AudioManager. ADJUST_LOWER, 0); // reduce the volume

Okay. The above is the simple voice scheduling;