Android studio 播放音频文件 播放语速

一、使用

public class MainActivity extends AppCompatActivity {
    
    
    private Hsvolume mHsVolume = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mHsVolume = new Hsvolume(this);
        mHsVolume.playMusic(R.raw.ceshi);//播放
        mHsVolume.setPlaySpeed(2.0F);//语速
    }
}

• 音频文件放置位置
  

二、Hsvolume 初始化音频类

public class Hsvolume {
    
    
    private Context context;
    private AudioManager mAudioManager;
    private MediaPlayer mPlayer;

    public Hsvolume(Context paramContext) {
    
    
        this.context = paramContext;
        this.mAudioManager = ((AudioManager) paramContext.getSystemService(Context.AUDIO_SERVICE));
    }
    //播放音频
    public void playMusic(int paramInt) {
    
    
        stopMusic();
        this.mPlayer = MediaPlayer.create(this.context, paramInt);
        if (this.mPlayer != null) {
    
    
            this.mPlayer.setLooping(false);
            this.mPlayer.start();
        }
    }
    //播放语速
    public boolean setPlaySpeed(float speed) {
    
    
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    
    
            try {
    
    
                PlaybackParams params = mPlayer.getPlaybackParams();
                params.setSpeed(speed);
                mPlayer.setPlaybackParams(params);
                return true;
            } catch (Exception e) {
    
    
                return false;
            }
        }
        return false;
    }
    //获取系统音量
    public void setSystemvolume(float b) {
    
    
        if (this.mAudioManager != null) {
    
    
            int max=mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
            this.mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC, (int) (b*max), 0);
            saveVolume((int) (b*max));
        }
    }
    public void saveVolume(int paramInt) {
    
    
        Uri localUri = Settings.System.getUriFor(Settings.System.AUTO_TIME);
        Settings.System.putInt(this.context.getContentResolver(), Settings.System.AUTO_TIME, paramInt);
        this.context.getContentResolver().notifyChange(localUri, null);
    }
    //设置触摸音量
    public void setTouchvolume(boolean isChecked) {
    
    
        ContentResolver contentResolver;
        if (this.mAudioManager != null) {
    
    
            this.mAudioManager.loadSoundEffects();
            contentResolver = this.context.getContentResolver();
            if (!(isChecked))
                Settings.System.putInt(contentResolver, Settings.System.SOUND_EFFECTS_ENABLED, 0);
            else{
    
    
                Settings.System.putInt(contentResolver, Settings.System.SOUND_EFFECTS_ENABLED, 1);
            }
            if (!isChecked) {
    
    
                this.mAudioManager.unloadSoundEffects();
                return;
            }
        }
    }
    public void stopMusic() {
    
    
        if (this.mPlayer != null) {
    
    
            this.mPlayer.stop();
            this.mPlayer.release();
            this.mPlayer = null;
        }
    }
}