How to open the built in Equalizer programmatically in Android?
<p>I have seen many apps opening systems in built Equalizer (google play music, Spotify, Samsung stock music player). Directly, without having to write their own from scratch. How do these apps do that? I couldn't find a solution.</p>

<pre><code>} else if (id == R.id.action_fx) {
        Intent intent = new Intent();
        intent.setAction("android.media.action.DISPLAY_AUDIO_EFFECT_CONTROL_PANEL");
        if ((intent.resolveActivity(getPackageManager()) != null)) {
            startActivity(intent);
        } else {
            Intent intent11 = new Intent(MainActivity.this, Help.class);
            intent11.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
            startActivity(intent11);
            // No equalizer found :(
        }
        return true;
</code></pre>