riff_app/app/src/main/java/io/r_a_d/radio2/BaseActivity.kt

package io.r_a_d.radio2

import android.content.Intent
import android.os.Bundle
import android.util.Log
import android.view.View
import android.view.ViewGroup
import android.view.ViewTreeObserver

import androidx.appcompat.app.AppCompatActivity
import androidx.localbroadcastmanager.content.LocalBroadcastManager
import androidx.preference.PreferenceManager
import com.google.android.material.bottomnavigation.BottomNavigationView

abstract class BaseActivity : AppCompatActivity() {

    private val keyboardLayoutListener : ViewTreeObserver.OnGlobalLayoutListener = ViewTreeObserver.OnGlobalLayoutListener {
        val viewHeight = (rootLayout?.rootView?.height ?: 0)
        val viewWidth = (rootLayout?.rootView?.width ?: 0)

        val height =  ((rootLayout?.height ?: 0))
        val width =  ((rootLayout?.width ?: 0))

        Log.d(tag, "$viewWidth, $viewHeight, $width, $height, ${viewHeight.toDouble()/viewWidth.toDouble()}, ${height.toDouble()/width.toDouble()}")

        val broadcastManager = LocalBroadcastManager.getInstance(this@BaseActivity)
        if(height <= viewHeight * 2 / 3 /*height.toDouble()/width.toDouble() < 1.20 */){
            val keyboardHeight = viewHeight - height
            onShowKeyboard(keyboardHeight)

            val intent = Intent("KeyboardWillShow")
            intent.putExtra("KeyboardHeight", keyboardHeight)
            broadcastManager.sendBroadcast(intent)
        } else {
            onHideKeyboard()

            val intent = Intent("KeyboardWillHide")
            broadcastManager.sendBroadcast(intent)
        }

    }

    private var keyboardListenersAttached = false
    private var rootLayout: ViewGroup? = null


    // keyboard stuff
    private fun onShowKeyboard(keyboardHeight: Int) {
        // do things when keyboard is shown
        val bottomNavigationView = findViewById<BottomNavigationView>(R.id.bottom_nav)
        bottomNavigationView.visibility = View.GONE
        Log.d(tag, "bottomNav visibility set to GONE (height $keyboardHeight)")
    }

     private fun onHideKeyboard() {
        // do things when keyboard is hidden
        val bottomNavigationView = findViewById<BottomNavigationView>(R.id.bottom_nav)
        bottomNavigationView.visibility = View.VISIBLE
        Log.d(tag, "bottomNav visibility set to VISIBLE")
    }

    protected fun attachKeyboardListeners() {

        if (keyboardListenersAttached) {
            return
        }

        rootLayout = findViewById(R.id.rootLayout)
        rootLayout!!.viewTreeObserver.addOnGlobalLayoutListener(keyboardLayoutListener)

        keyboardListenersAttached = true
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        preferenceStore = PreferenceManager.getDefaultSharedPreferences(this)
    }

    override fun onDestroy() {
        super.onDestroy()
        if (keyboardListenersAttached) {
            rootLayout?.viewTreeObserver?.removeOnGlobalLayoutListener(keyboardLayoutListener)
        }
    }
}