Android audio play SoundPool usage and encapsulation, androidsoundpool

Android audio play SoundPool usage and encapsulation, androidsoundpool

Generally, MediaPlayer is used to play audio. the creation and destruction of MediaPlayer consume a lot of resources, if we want to play short-lived and frequently-played audio, MediaPlayer is not suitable. Let's talk about playing short-lived audio in SoundPool:

The SoundPool structure is as follows:

Initialization SoundPool

InitializationSoundPoolWe directlynew SoundPool (int maxStreams, int streamType, int srcQuality)You can.

Parameter description:

Parameters	Explanation
MaxStreams	Maximum number of streams
StreamType	Stream type (SEE) SuggestionsAudioManager.STREAM_SYSTEM
SrcQuality	Frequency quality. The default value is 0, which is not affected currently.

Important Methods

Load audio

InloadIn this method, we usually place the audio fileresOfrawFolder, and then useload(Context context, int resId, int priority)Method to load the audioSoundPoolMedium:

Parameter description:

Parameters	Explanation
Context	Context
ResId	Audio file address: R. raw. deep
Priority	Priority: the priority is set to 1 if the audio is short.

Play audio

It is relatively simple to play audio.play(int soundID, float leftVolume, float rightVolume, int priority, int loop, float rate)

Parameter description:

Parameters	Explanation
SoundID	Sound id (that is, the sequence from load to SoundPool, starting from 1)
LeftVolume \ rightVolume	Volume Control for left/right audio channels, from 0.0 to 1.0
Priority	Priority. 0 is the lowest priority.
Loop	Whether to play cyclically. 0 indicates no loop, and-1 indicates loop.
Rate	Playback ratio, from 0.5 to 2, generally 1, indicating normal playback

Summary

The code used to play an audio video is as follows:

// Initialize SoundPoolprivate SoundPool soundPool = newSoundPool (10, AudioManager. STREAM_SYSTEM, 5); // load the deep audio file soundPool. load (this, R. raw. deep, 1); // play the deepsoundPool. play (1, 1, 0, 0, 1 );

Encapsulation

If we use audio files in many activities, for example, adding sound effects to all click operations, we need new for each Activity, and load the audio files in play, this is complicated and confusing, so we do the following sub-assembly:

/*** @ Author zsl * @ blog http://blog.csdn.net/yy1300326388 ***/public class SoundPlayUtils {// SoundPool object public static SoundPool mSoundPlayer = new SoundPool (10, AudioManager. STREAM_SYSTEM, 5); public static SoundPlayUtils soundPlayUtils; // Context static context mContext;/*** initialize ** @ param Context */public static SoundPlayUtils init (context Context) {if (soundPlayUtils = null) {soundPlayUtils = new SoundPlayUtils ();} // initialize the sound mContext = context; mSoundPlayer. load (mContext, R. raw. beng, 1); // 1 mSoundPlayer. load (mContext, R. raw. click, 1); // 2 mSoundPlayer. load (mContext, R. raw. diang, 1); // 3 mSoundPlayer. load (mContext, R. raw. ding, 1); // 4 mSoundPlayer. load (mContext, R. raw. gone, 1); // 5 mSoundPlayer. load (mContext, R. raw. popup, 1); // 6 mSoundPlayer. load (mContext, R. raw. water, 1); // 7 mSoundPlayer. load (mContext, R. raw. ying, 1); // 8 return soundPlayUtils;}/*** playback sound ** @ param soundID */public static void play (int soundID) {mSoundPlayer. play (soundID, 1, 1, 0, 0, 1 );}}

First, we load all the files. When using it, we can directly query and check whether the files are loaded. Then we can directly call the play method:

Use

Step 1: Add the following code to the onCreate method of the Activity at the program entry:

// Initialize the sound effect SoundPlayUtils. init (this );

Step 2: directly use the following code when playing anywhere:

• Playbeng

// Play sound SoundPlayUtils. play (1 );

• Playwater

// Play sound SoundPlayUtils. play (7 );

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