Use of SoundPool in Android

Use of SoundPool in Android

We all know that MediaPlayer uses a lot of resources and cannot play multiple audios at the same time. Therefore, we have a SoundPool, such as our common key tone or mobile phone prompt sound, for example, we have a lot of sound effects in game development. Below we will introduce her usage:

The procedure is as follows:

1. Create a SoundPool object

The source code is as follows:

/*** Method body in the SoundPool source code ** @ param maxStreams: Maximum number of audios x @ param streamType specifies the sound type, specify the * @ param srcQuality through the constant provided by the AudioManager class to specify the audio quality. The default value is 0 * @ return a SoundPool object, or null if creation failed */public SoundPool (int maxStreams, int streamType, int srcQuality)

2. Load the audio to be played:

/**     * @param context the application context     * @param resId the resource ID     * @param priority the priority of the sound. Currently has no effect. Use     *                 a value of 1 for future compatibility.     * @return a sound ID. This value can be used to play or unload the sound.     */ public int load(Context context, int resId, int priority);

3. play audio

/*** Play a sound from a sound ID. * @ param soundID: the audio returned by the load method * @ param leftVolume left-channel volume * @ param rightVolume right-channel volume * @ param priority. The greater the value, higher priority * @ param loop cycle times: 0 indicates no loop,-1 indicates a loop * @ param rate specifies the rate, the normal bit 1, the status is 0.5, highest 2 * @ return non-zero streamID if successful, zero if failed */public final int play (int soundID, float leftVolume, float rightVolume, int priority, int loop, float rate );

4. The case is as follows:

(1) Layout file:

(2) MainActivity. java File

Package com. mingrisoft; import java. util. hashMap; import android. app. activity; import android. media. audioManager; import android. media. soundPool; import android. OS. bundle; import android. view. keyEvent; import android. view. view; import android. view. view. onClickListener; import android. widget. button; public class MainActivity extends Activity {private SoundPool soundpool; // declare a SoundPool object // use HashMap to manage various audio private hashmaps
  
   
Soundmap = new HashMap
   
    
(); // Create a HashMap object @ Override public void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. main); Button chimes = (Button) findViewById (R. id. button1); // get the "Wind ringtone" Button enter = (Button) findViewById (R. id. button2); // obtain the "cuckoo cry" Button notify = (Button) findViewById (R. id. button3); // get the "ringtone" Button ringout = (Button) findViewById (R. id. button4); // get the "Phone Sound" button soundpool = new SoundPool (5, AudioManager. STREAM_SYSTEM, 0); // create a SoundPool object, which can accommodate 5 audio streams // Save the audio streams to the HashMap object soundmap. put (1, soundpool. load (this, R. raw. chimes, 1); soundmap. put (2, soundpool. load (this, R. raw. enter, 1); soundmap. put (3, soundpool. load (this, R. raw. notify, 1); soundmap. put (4, soundpool. load (this, R. raw. ringout, 1); soundmap. put (5, soundpool. load (this, R. raw. ding, 1); // Add and click the event listener chimes for each button. setOnClickListener (new OnClickListener () {@ Override public void onClick (View v) {soundpool. play (soundmap. get (1), 1, 1, 0, 0, 1); // play the specified audio}); enter. setOnClickListener (new OnClickListener () {@ Override public void onClick (View v) {soundpool. play (soundmap. get (2), 1, 1, 0, 0, 1); // play the specified audio}); y. setOnClickListener (new OnClickListener () {@ Override public void onClick (View v) {soundpool. play (soundmap. get (3), 1, 1, 0, 0, 1); // play the specified audio}); ringout. setOnClickListener (new OnClickListener () {@ Override public void onClick (View v) {soundpool. play (soundmap. get (4), 1, 1, 0, 0, 1); // play the specified audio soundpool. play (soundpool. load (MainActivity. this, R. raw. optional Y, 1), 1, 1, 0, 0, 1) ;}} // the event where the rewrite key is pressed @ Override public boolean onKeyDown (int keyCode, keyEvent event) {soundpool. play (soundmap. get (5), 1, 1, 0, 0, 1); // return true for the playback key ;}}
   
  

In addition, there are several small ringtones in the raw file of the resource file, which are not displayed here.