Utilitaires Android

Overlay.kt

\***
  * Can be used from any context (Activity, Service, ...)
  *\

private fun createOverlay() {
  windowManager = getSystemService(WINDOW_SERVICE) as WindowManager

  dimView = View(this).apply {
    setBackgroundColor(Color.argb(brightnessAlpha, 0, 0, 0))
    setTheme(android.R.style.Theme_Holo_NoActionBar_Fullscreen)
  }

  val params = WindowManager.LayoutParams(
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)
    windowManager?.maximumWindowMetrics?.bounds?.width() ?:
    WindowManager.LayoutParams.MATCH_PARENT
    else WindowManager.LayoutParams.MATCH_PARENT,
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)
    windowManager?.maximumWindowMetrics?.bounds?.height()?.let { it + 512 } ?:
    WindowManager.LayoutParams.MATCH_PARENT
    else WindowManager.LayoutParams.MATCH_PARENT,
    windowType(),
    WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE or
    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE or
    WindowManager.LayoutParams.FLAG_FULLSCREEN or
    WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN or
    WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
    PixelFormat.TRANSLUCENT
  )
  params.gravity = Gravity.TOP or Gravity.START

  windowManager?.addView(dimView, params)
}

private fun removeOverlay() {
  dimView?.let {
    windowManager?.removeView(it)
    dimView = null
  }
}