java - Could not find class 'android.media.AudioAttributes$Builder' -


so i'm implementing playing sounds game i'm working on. game supports api 8 latest 21. i'm using soundpool play , handle sounds seems api 21, have set audioattributes soundpool.

i getting following error:

05-15 13:56:48.202 26245-26245/thedronegame.group08.surrey.ac.uk.thedronegame e/dalvikvm﹕ not find class 'android.media.audioattributes$builder', referenced method thedronegame.group08.surrey.ac.uk.thedronegame.sound.initializerecentapisoundpool

sound class

<pre>package thedronegame.group08.surrey.ac.uk.thedronegame;  import android.annotation.targetapi; import android.content.context; import android.media.audioattributes; import android.media.audiomanager; import android.media.soundpool; import android.media.mediaplayer; import android.os.build; import android.util.log;  /**  * created michael on 19/03/15.  */ public class sound {      /**      * sound pool      */     private soundpool soundpool = null;       /**      * current sound.      */     private int sound = 0;      /**      * false boolean.      */     private boolean loaded = false;      /**      * context.      */     private context context = null;      /**      * audio manager.      */     private audiomanager audiomanager = null;      /**      * literal volume.      */     private float literalvolume = 0;      /**      * maximum volume.      */     private float maximumvolume = 0;      /**      * volume.      */     private float volume = 0;      /**      * constructor creating new sound object      */     public sound(context context) {          this.context = context;          this.audiomanager = (audiomanager) context.getsystemservice(context.audio_service);          // set literal volume audio manager.         this.literalvolume = (float) audiomanager.getstreamvolume(audiomanager.stream_music);          // set maximum volume audio manager.         this.maximumvolume = (float) audiomanager.getstreammaxvolume(audiomanager.stream_music);          // set volume gamesound pool.         this.volume = literalvolume / maximumvolume;     }      /**
          * initialize soundpool later api versions      */     @targetapi(build.version_codes.lollipop)     private void initializerecentapisoundpool() {         // create audioattributes.           audioattributes attributes = new audioattributes.builder()                 .setusage(audioattributes.usage_game)                 .setcontenttype(audioattributes.content_type_sonification)                 .build();          this.soundpool = new soundpool.builder()                 .setaudioattributes(attributes)                 .setmaxstreams(7)                 .build();     }      /**
          * intialize soundpool older api
     versions      */     @suppresswarnings("deprecation")     private void initializedeprecatedapisoundpool() {         // initialize soundpool.         this.soundpool = new soundpool(1, audiomanager.stream_music,0);     }      /**
          * load sounds soundpool.
          */     private void loadintosoundpool() {         //todo: finish loadintosoundpool() method          // loads sounds array          // sound 0.         this.soundpool.load(this.context, r.raw.blip_select2, 0);          // sound 1.         //this.soundpool.load(context, r.raw.sound, 1);     }      /**      * set initial soundpool.
          *  call method differs dependent on api version.
          */     public void setinitialsoundpool() {          // initialize soundpool, call specific dependent on sdk version         if (build.version.sdk_int >= build.version_codes.lollipop) {             initializerecentapisoundpool();         }         else {             initializedeprecatedapisoundpool();         }          this.soundpool.setonloadcompletelistener(new soundpool.onloadcompletelistener() {              @override             public void onloadcomplete(soundpool soundpool, int sampleid, int status) {                 loaded = true;                 soundpool.load(context, r.raw.blip_select2, 0);             }         });          // load sounds sound pool resources.         //this.loadintosoundpool();      }      /**      * plays sound      * @param id - sound id      * @param context - context      */     public void playsound(int id, final context context) {         // create audio manager using context.          soundpool.play(id, this.volume, this.volume, 1, 0, 1f);           // play gamesound gamesound pool defined volumes.           log.e("soundpool", "game gamesound played");     } }</code>

does guys meet issue?any appreciated.

thank david wasser :)

i share final implementation works api 21 , lower.

as found when building soundpool api 21 + have first create audioattributes:

    log.d("sound", "initialize audio attributes.");     // initialize audioattributes.     audioattributes attributes = new audioattributes.builder()             .setusage(audioattributes.usage_game)             .setcontenttype(audioattributes.content_type_sonification)             .build();

following building audioattributes, initialise soundpool sound.builder:

    log.d("sound", "set audioattributes soundpool.");     // set audioattributes soundpool , specify maximum number of streams.     soundpool = new soundpool.builder()             .setaudioattributes(attributes)             .setmaxstreams(7)             .build();

please note david wasser pointed out, audioattributes must in separate class of default class handing sound audioattributes not known api 21 - compatible devices , report in error. created class api 21 soundpool , audioattributes implementation:

soundrecent.java

    import android.annotation.targetapi;     import android.media.audioattributes;     import android.media.soundpool;     import android.os.build;     import android.util.log;      /**      * created michaelstokes on 17/05/15.      */     public class soundrecent {          /**
                  * initialize soundpool later api versions          */         @targetapi(build.version_codes.lollipop)         public soundpool initializerecentapisoundpool(soundpool soundpool) {          log.d("sound", "initialize audio attributes.");         // initialize audioattributes.         audioattributes attributes = new audioattributes.builder()                 .setusage(audioattributes.usage_game)                 .setcontenttype(audioattributes.content_type_sonification)                 .build();          log.d("sound", "set audioattributes soundpool.");         // set audioattributes soundpool , specify maximum number of streams.         soundpool = new soundpool.builder()                 .setaudioattributes(attributes)                 .setmaxstreams(7)                 .build();          return soundpool;     } }

**for original soundclass checking of devices api version , appropriate initialiser called: **

    package thedronegame.group08.surrey.ac.uk.thedronegame;  import android.annotation.targetapi; import android.content.context; import android.media.audiomanager; import android.media.soundpool; import android.os.build; import android.util.log;  /**  * created michael on 19/03/15.  */ public class sound {      /**      * sound pool      */     private soundpool soundpool = null;       /**      * current sound.      */     private int sound = 0;      /**      * false boolean.      */     private boolean loaded = false;      /**      * context.      */     private context context = null;      /**      * audio manager.      */     private audiomanager audiomanager = null;      /**      * literal volume.      */     private float literalvolume = 0;      /**      * maximum volume.      */     private float maximumvolume = 0;      /**      * volume.      */     private float volume = 0;      /**      * constructor creating new sound object      */     public sound(context context) {          this.context = context;          this.audiomanager = (audiomanager) context.getsystemservice(context.audio_service);          // set literal volume audio manager.         this.literalvolume = (float) audiomanager.getstreamvolume(audiomanager.stream_music);          // set maximum volume audio manager.         this.maximumvolume = (float) audiomanager.getstreammaxvolume(audiomanager.stream_music);          // set volume gamesound pool.         this.volume = literalvolume / maximumvolume;      }      /**
          * initialize soundpool later api versions      */     @targetapi(build.version_codes.lollipop)     private void initializerecentapisoundpool() {          log.d("soundpool", "initialize recent api sound pool");         this.soundpool = new soundrecent().initializerecentapisoundpool(this.soundpool);     }      /**
          * intialize soundpool older api
     versions      */     @suppresswarnings("deprecation")     private void initializedeprecatedapisoundpool() {         // initialize soundpool.         this.soundpool = new soundpool(1, audiomanager.stream_music, 0);     }      /**
          * load sounds soundpool.
          */     private void addsoundstosoundpool() {          log.d("sound", "load sounds.");          int soundid = 0;          // load sound 1         soundid = soundpool.load(context, r.raw.blip_select2, 1);         log.d("sound", "sound " + soundid + " loaded.");          // load sound 2         soundid = soundpool.load(context, r.raw.pickup_coin3, 1);         log.d("sound", "sound " + soundid + " loaded.");          // load sound 3         soundid = soundpool.load(context, r.raw.explosion2, 1);         log.d("sound", "sound " + soundid + " loaded.");          // load sound 4         soundid = soundpool.load(context, r.raw.powerup8, 1);         log.d("sound", "sound " + soundid + " loaded.");          // load sound 5         soundid = soundpool.load(context, r.raw.powerup15, 1);         log.d("sound", "sound " + soundid + " loaded.");          // load sound 6         soundid = soundpool.load(context, r.raw.jump9, 1);         log.d("sound", "sound " + soundid + " loaded.");          // load sound 7         soundid = soundpool.load(context, r.raw.powerup18, 1);         log.d("sound", "sound " + soundid + " loaded.");     }      /**      * set initial soundpool.
          *  call method differs dependent on api version.
          */     public void setinitialsoundpool() {          log.d("sound", "initialize recent or deprecated api soundpool.");          // initialize soundpool, call specific dependent on sdk version         if (build.version.sdk_int >= build.version_codes.lollipop) {             log.d("sound", "initialize recent api soundpool.");             initializerecentapisoundpool();         }         else {             log.d("sound", "initialize old api soundpool.");             initializedeprecatedapisoundpool();         }          this.soundpool.setonloadcompletelistener(new soundpool.onloadcompletelistener() {              @override             public void onloadcomplete(soundpool soundpool, int sampleid, int status) {                 loaded = true;             }         });          // add , load sounds soundpool.         this.addsoundstosoundpool();     }      /**      * plays sound      * @param id - sound id      * @param context - context      */     public void playsound(int id, final context context) {          log.d("sound", "play gamesound " + id + 1 + ".");         soundpool.play(id + 1, this.volume, this.volume, 1, 0, 1f);         log.d("sound", "gamesound " + id + 1 + " played");     } }

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