insert the proper character at releasing a key after long pressing

app/src/main/kotlin/com/simplemobiletools/keyboard/views/MyKeyboardView.kt

@@ -1099,6 +1099,16 @@ class MyKeyboardView @JvmOverloads constructor(context: Context, attrs: Attribut
                     }
                 }
                 MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
+                    if (mMiniKeyboard != null) {
+                        val coords = intArrayOf(0, 0)
+                        mMiniKeyboard!!.getLocationOnScreen(coords)
+                        val keys = mMiniKeyboard!!.mKeys
+                        val widthPerKey = mMiniKeyboard!!.width / keys.size
+                        var selectedKeyIndex = Math.floor((me.x - coords[0]) / widthPerKey.toDouble()).toInt()
+                        selectedKeyIndex = Math.max(0, Math.min(selectedKeyIndex, keys.size - 1))
+                        val selectedKeyCodes = keys[selectedKeyIndex].codes
+                        onKeyboardActionListener!!.onKey(selectedKeyCodes[0], selectedKeyCodes.toIntArray())
+                    }
                     dismissPopupKeyboard()
                 }
             }

app/src/main/res/drawable/btn_keyboard_key.xml

@@ -1,14 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?><!-- Copyright (C) 2008 The Android Open Source Project
+<?xml version="1.0" encoding="utf-8"?>
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-          http://www.apache.org/licenses/LICENSE-2.0
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
 
     <item android:drawable="@drawable/btn_keyboard_key_pressed_on" android:state_checkable="true" android:state_checked="true" android:state_pressed="true" />