## Indeterminate Progress Bar on Android Preferences Screen

item_loading_pref_row.xml

<?xml version="1.0" encoding="utf-8"?>
<ProgressBar
	xmlns:android="http://schemas.android.com/apk/res/android"
	style="?android:attr/progressBarStyleHorizontal"
	android:layout_width="match_parent"
	android:layout_height="wrap_content"
	android:indeterminateOnly="true"
	android:layout_marginStart="16dp"
	android:layout_marginEnd="16dp" />

LoadingPreferenceRow.kt

package com.your.package.structure.here

/**
 * Custom Preference that provides an indeterminate progress bar for showing loading/long-running operations.
 * Set checked to to "true" to show the progress bar and "false" to hide it.
 */
class LoadingPreferenceRow constructor(
	context: Context, attrs: AttributeSet? = null
): SwitchPreference(context, attrs) {

	init {
		layoutResource = R.layout.item_loading_pref_row
	}

	override fun onBindViewHolder(holder: PreferenceViewHolder?) {
		super.onBindViewHolder(holder)

		val progressBar = holder?.itemView as? ProgressBar
		progressBar?.visibility = if (isChecked) View.VISIBLE else View.GONE
	}
}