kheldiente

import android.content.Context
import android.content.SharedPreferences
import org.json.JSONObject

object AppSettings {

  private val PREF_NAME = "settings_pref"

  // Settings
  val EQUALIZER_ENABLED = "settings_eq_enabled"

kheldiente

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="@color/colorPrimary"
  android:orientation="vertical"
  tools:context="midien.kheldiente.equalizer.MainActivity"
  >

kheldiente

import android.media.MediaPlayer
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.media.audiofx.Equalizer
import android.support.v7.widget.LinearLayoutManager
import android.util.Log
import android.widget.CompoundButton
import kotlinx.android.synthetic.main.activity_main.*
import kotlinx.android.synthetic.main.layout_switch.*
import midien.kheldiente.equalizer.adapter.PresetAdapter

kheldiente

override fun onCheckedChanged(compoundButton: CompoundButton?, checked: Boolean) {
  enableEqualizer(checked)
  presetAdapter?.enableAll(checked) // Update color state of list
}

private fun enableEqualizer(enable: Boolean) {
  equalizer?.enabled = enable
}

kheldiente

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorPrimary"
    android:paddingLeft="15dp"
    android:paddingTop="15dp"
    android:paddingRight="10dp"

kheldiente

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorPrimary"
    android:padding="15dp"
    >

kheldiente

import android.content.Context
import android.support.v7.widget.RecyclerView
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.CheckBox
import android.widget.CompoundButton
import android.widget.TextView
import kotlinx.android.synthetic.main.item_preset.view.*

kheldiente

private val presetList = ArrayList<Preset>(0)
private var presetAdapter: PresetAdapter? = null

private fun setupPresetList() {
  
  presetAdapter = PresetAdapter(this) { position: Int, preset: Preset ->
    setSelectedPreset(position, preset)
  }
  presetAdapter?.enabled = eqEnabled
  presetAdapter?.currentPreset = eqPreset

kheldiente

override fun onBandLevelChanged(bandId: Int, value: Int, fromUser: Boolean) {
  val lowestBandLevel = equalizer?.bandLevelRange?.get(0)
  val bandLevel = (value.plus(lowestBandLevel!!)).toShort()

  // Manipulate equalizer band level
  setBandLevel(bandId.toShort(), bandLevel)

  ... Cached current value of band
}

kheldiente

private fun setupEqualizerView() {
  val numberOfBands = equalizer?.numberOfBands
  val lowestBandLevel = equalizer?.bandLevelRange?.get(0)
  val highestBandLevel = equalizer?.bandLevelRange?.get(1)
  val max = highestBandLevel?.minus(lowestBandLevel!!)!! 
  
  var bands = ArrayList<Integer>(0)
    // Get center frequency for each band
    (0 until numberOfBands!!)
            .map { equalizer?.getCenterFreq(it.toShort()) }