mediaplayerアクティビティでイコライザを実装する方法

Question

私はメディアプレーヤーで自分のオンラインラジオを作成しました。ベース、トレブル、リバーブなどのさまざまなサウンドエフェクトのイコライザーを設定する必要があります。メディアプレーヤーはメインのAcitvityにあります。私の主な活動と一緒にイコライザを含むこのアクティビティをどのように実装するのですか？

私のイコライザーで棒にだけ求める：

public class EqualizerActivity extends AppCompatActivity { 

    MediaPlayer mediaPlayer; 
    LinearLayout linear; 
    SeekBar seekbar; 
    private Equalizer mEqualizer; 
    TextView tvequalizer,tvcenfreq,tvmineq,tvmaxeq;  

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.mainactivity); 

     setVolumeControlStream(AudioManager.STREAM_MUSIC); 
     mediaPlayer = MediaPlayer.create(this,R.raw.mukilmusic); 

     setupEqualizerFxAndUI(); 
     mediaPlayer.setLooping(true);  

     mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { 
      public void onCompletion(MediaPlayer mediaPlayer) { 
//    mVisualizer.setEnabled(false); 
      } 
     }); 
     mediaPlayer.start(); 
//  tvaudio.setText("Playing audio...");  
    } 

    private void setupEqualizerFxAndUI() { 
     mEqualizer = new Equalizer(0, mediaPlayer.getAudioSessionId()); 
     mEqualizer.setEnabled(true); 

     linear = (LinearLayout)findViewById(R.id.linear) ; 
     tvequalizer = (TextView) findViewById(R.id.tvequalizer); 
     tvequalizer.setText("Equalizer:"); 
//  linear.addView(tvequalizer); 

     short bands = mEqualizer.getNumberOfBands(); 
     final short minEQLevel = mEqualizer.getBandLevelRange()[0]; 
     final short maxEQLevel = mEqualizer.getBandLevelRange()[1]; 
     for (short i = 0; i < bands; i++) { 
      final short band = i; 

      tvcenfreq = (TextView) findViewById(R.id.tvcenfreq); 
     tvcenfreq.setText((mEqualizer.getCenterFreq(band)/1000) + " Hz"); 
//   linear.addView(tvcenfreq); 

      LinearLayout row = new LinearLayout(this); 
      row.setOrientation(LinearLayout.HORIZONTAL); 

      tvmineq = new TextView(this); 
      tvmineq.setText((minEQLevel/ 100) + " db"); 
      // linear.addView(tvmineq); 

      tvmaxeq = new TextView(this); 
      tvmaxeq.setText((maxEQLevel/ 100) + " db"); 
     // linear.addView(tvmaxeq); 

      LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
        ViewGroup.LayoutParams.FILL_PARENT, 
        ViewGroup.LayoutParams.WRAP_CONTENT); 

      layoutParams.weight = 1; 
      seekbar = new SeekBar(this); 
      seekbar.setLayoutParams(layoutParams); 
      seekbar.setMax(maxEQLevel - minEQLevel); 
      seekbar.setProgress(mEqualizer.getBandLevel(band)); 
      seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { 
       public void onProgressChanged(SeekBar seekBar, int progress, 
               boolean fromUser) { 
        mEqualizer.setBandLevel(band, (short) (progress + minEQLevel)); 
       } 
       public void onStartTrackingTouch(SeekBar seekBar) {} 
       public void onStopTrackingTouch(SeekBar seekBar) {} 
      }); 
      row.addView(tvmineq); 
      row.addView(seekbar); 
      row.addView(tvmaxeq); 
      linear.addView(row); 
     }  
    } 
    @Override 
    protected void onPause() { 
     super.onPause(); 
     if (isFinishing() && mediaPlayer != null) { 
//   mVisualizer.release(); 
      mEqualizer.release(); 
      mediaPlayer.release(); 
      mediaPlayer = null; 
     } 
    } 

Answer 1

クレートをイコライザー

Equalizer equalizer = new Equalizer(0,mediaplayer.getAudioSessionId()); 
equalizer.setEnabled(true); 
equalizer.getNumberOfBands(); //it tells you the number of equalizer in device. 
equalizer.getNumberOfPresets();//like Normal Classic,Dance Flat,Folk Heavy Metal,Hip Hop,Jazz, Pop, Rock 

リンク

Android Visualizer implementation crash https://developer.android.com/reference/android/media/audiofx/Equalizer.html http://www.101apps.co.za/articles/perfect-sound-using-the-equalizer-effect-a-tutorial.html