Question

我试图在android中实现bassboost效果..但没有效果..我使用以下代码进行低音效果;（我尝试使用全局音频会话ID并在清单文件中添加了权限） - ＆gt;修改音频设置..

enter code here

     BassBoost boost = new BassBoost(0,mp.getAudioSessionId());
     boost.setEnabled(true);
     boost.setStrength((Short)1000);
     mp.attachAuxEffect(boost.getId());--->if i use this i'm getting(-38,0) or else no effect                         
     mp.setSendLevel(1.0f);

我使用下面的代码进行低音增强效果。网络媒体播放器（-38,0）错误..请解决此问题..

enter code here
 public class MainActivity extends Activity
{

 MediaPlayer mediaplayer;
 AssetFileDescriptor descriptor;

 protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setVolumeControlStream(AudioManager.STREAM_MUSIC);
setContentView(R.layout.activity_main);
mediaplayer = new MediaPlayer();
mediaplayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

try {
    descriptor = MainActivity.this.getAssets().openFd("Kalimba.mp3");
} catch (IOException e1) {
    e1.printStackTrace();
}
try {
    mediaplayer.setDataSource(descriptor.getFileDescriptor(),
              descriptor.getStartOffset(),                                 descriptor.getLength());


} catch (IllegalArgumentException e1) {

    e1.printStackTrace();
} catch (IllegalStateException e1) {

    e1.printStackTrace();
} catch (IOException e1) {

    e1.printStackTrace();
}
try {
    descriptor.close();
} catch (IOException e1) {

    e1.printStackTrace();
}

setUpBooster();

mediaplayer.setOnPreparedListener(new OnPreparedListener() {

    @Override
    public void onPrepared(MediaPlayer mp) {
        mp.start();
    }
});



  }

 public void setUpBooster() {

BassBoost booster = new BassBoost(0,0);//-->tried with sessionid also
booster.setStrength((short) 1000);
booster.setEnabled(true);
mediaplayer.attachAuxEffect(booster.getId());
mediaplayer.setAuxEffectSendLevel(1.0f);
try {
    mediaplayer.prepare();
} catch (IllegalStateException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
}

}


@Override
public void onBackPressed() {
super.onBackPressed();

  }

 }

Answer 1

错误38 表示您询问MediaPlayer to do something when in the wrong state.您将不会able to fathom your error just from this。

只要您在其上致电setDataSource()，您就需要再次prepare()。可以把它想象成加载文件，准备播放。

修改

您已经在创建媒体播放器时附加了bassboost。请删除此mp.attachAuxEffect(boost.getId());

Android中的BassBoost效果

1 个答案: