feat: Add Nix flake

.gitignore

@@ -28,3 +28,7 @@ migrate_working_dir/
 .dart_tool/
 .packages
 build/
+
+# Nix
+.envrc
+.direnv/

CHANGELOG.md

@@ -1,3 +1,20 @@
 ## 0.0.1
 
-* TODO: Describe initial release.
+* Initial release.
+
+## 0.0.2
+
+* Documentation.
+
+## 0.0.3
+
+* More documentation.
+
+## 0.0.4
+
+* N/A
+
+## 0.0.5
+
+* Exclude the top bar from the keyboard height
+* Include the bottom nav bar in the keyboard height

LICENSE

@@ -1 +1,29 @@
-TODO: Add your license here.
+BSD 3-Clause License
+
+Copyright (c) 2023, Noah Schairer
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of the copyright holder nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

@@ -1,16 +1,58 @@
-# keyboard_height_plugin
+# Keyboard Height Plugin for Flutter
 
-A new Flutter plugin project.
+`keyboard_height_plugin` is a Flutter plugin for iOS and Android that provides the keyboard size before the keyboard animation occurs for showing or hiding it. This helps eliminate lag when positioning widgets around the keyboard, such as placing a TextField above the keyboard.
 
-## Getting Started
+## Installation
 
-This project is a starting point for a Flutter
-[plug-in package](https://flutter.dev/developing-packages/),
-a specialized package that includes platform-specific implementation code for
-Android and/or iOS.
+To install `keyboard_height_plugin`, add it to your `pubspec.yaml` file under the `dependencies` section:
 
-For help getting started with Flutter development, view the
-[online documentation](https://flutter.dev/docs), which offers tutorials,
-samples, guidance on mobile development, and a full API reference.
+```yaml
+dependencies:
+  keyboard_height_plugin: ^0.0.4
+```
 
-# keyboard_height_plugin
+## Usage
+
+To use the `keyboard_height_plugin`, first import it in your Dart file:
+
+```dart
+import 'package:keyboard_height_plugin/keyboard_height_plugin.dart';
+```
+
+Next, create a stateful widget and declare a variable to store the keyboard height and create an instance of the `KeyboardHeightPlugin`:
+
+```dart
+class _HomePageState extends State<HomePage>; {
+  double _keyboardHeight = 0;
+  final KeyboardHeightPlugin _keyboardHeightPlugin = KeyboardHeightPlugin();
+  // ... rest of code ...
+}
+```
+
+Then, initialize the `KeyboardHeightPlugin` in your `initState` method and listen for changes in the keyboard height:
+
+```dart
+@override
+void initState() {
+  super.initState();
+  _keyboardHeightPlugin.onKeyboardHeightChanged((double height) {
+    setState(() {
+      _keyboardHeight = height;
+    });
+  });
+}
+```
+
+Use the `_keyboardHeight` variable to position your widgets around the keyboard. 
+
+## Example
+
+For a complete example on how to use the `keyboard_height_plugin`, please refer to the [`example`](example) directory in the repository.
+
+## Contributing
+
+If you encounter any issues or have suggestions for improvements, feel free to open an issue or submit a pull request on the project's GitHub repository.
+
+## License
+
+This plugin is licensed under the [BSD 3-Clause License](LICENSE).

android/build.gradle

@@ -2,7 +2,7 @@ group 'com.nschairer.keyboard_height_plugin'
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.7.10'
+    ext.kotlin_version = '1.8.21'
     repositories {
         google()
         mavenCentral()
@@ -44,3 +44,7 @@ android {
         minSdkVersion 16
     }
 }
+
+dependencies {
+    implementation "androidx.core:core-ktx:1.10.1"
+}

android/gradle.properties

@@ -0,0 +1,2 @@
+ android.useAndroidX=true
+ android.enableJetifier=true

android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

android/gradlew

@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# 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
+#
+#      https://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.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

android/gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

android/src/main/kotlin/com/nschairer/keyboard_height_plugin/KeyboardHeightPlugin.kt

@@ -1,7 +1,12 @@
 package com.nschairer.keyboard_height_plugin
 import android.graphics.Rect
+import android.util.Log
+import android.view.View
 import androidx.annotation.NonNull
 import android.view.ViewTreeObserver
+import android.view.WindowInsetsController
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
 import io.flutter.embedding.engine.plugins.FlutterPlugin
 import io.flutter.plugin.common.EventChannel
 import io.flutter.embedding.engine.plugins.activity.ActivityAware
@@ -12,6 +17,7 @@ class KeyboardHeightPlugin : FlutterPlugin, EventChannel.StreamHandler, Activity
     private var eventSink: EventChannel.EventSink? = null
     private var eventChannel: EventChannel? = null
     private var activityPluginBinding: ActivityPluginBinding? = null
+    private var bottomInset: Int = 0
 
     override fun onAttachedToEngine(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
         eventChannel = EventChannel(flutterPluginBinding.binaryMessenger, keyboardHeightEventChannelName)
@@ -22,40 +28,51 @@ class KeyboardHeightPlugin : FlutterPlugin, EventChannel.StreamHandler, Activity
         eventChannel?.setStreamHandler(null)
     }
 
-    override fun onListen(arguments: Any?, events: EventChannel.EventSink?) {
-        eventSink = events
-        val rootView = activityPluginBinding?.activity?.window?.decorView?.rootView
+    fun handleKeyboardHeightCheck(rootView: View?) {
         rootView?.viewTreeObserver?.addOnGlobalLayoutListener(object : ViewTreeObserver.OnGlobalLayoutListener {
             override fun onGlobalLayout() {
                 val r = Rect()
                 rootView.getWindowVisibleDisplayFrame(r)
 
                 val screenHeight = rootView.height
-                val keypadHeight = screenHeight - r.bottom - getNavigationBarHeight()
+                // Also subtract the height of the bottom inset as the SafeArea with "bottom: false"
+                // allows us to draw under the bottom system bar, if it is there.
+                val keypadHeight = screenHeight - r.bottom - bottomInset
 
                 val displayMetrics = activityPluginBinding?.activity?.resources?.displayMetrics
                 val logicalKeypadHeight = keypadHeight / (displayMetrics?.density ?: 1f)
 
                 if (keypadHeight > screenHeight * 0.15) {
-                    events?.success(logicalKeypadHeight.toDouble())
+                    eventSink?.success(logicalKeypadHeight.toDouble())
                 } else {
-                    events?.success(0.0)
+                    eventSink?.success(0.0)
                 }
             }
         })
     }
 
-    override fun onCancel(arguments: Any?) {
-        eventSink = null
+    override fun onListen(arguments: Any?, events: EventChannel.EventSink?) {
+        eventSink = events
+        val rootView = activityPluginBinding?.activity?.window?.decorView?.rootView
+        handleKeyboardHeightCheck(rootView)
+
+        if (rootView != null) {
+            ViewCompat.setOnApplyWindowInsetsListener(rootView!!) { view, windowInsets ->
+                val insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars())
+                val triggerEvent = bottomInset != insets.bottom
+                bottomInset = insets.bottom
+
+                // Notify in case the inset changed
+                if (triggerEvent) handleKeyboardHeightCheck(rootView)
+
+                Log.d("keyboard_height_plugin", "Got inset of " + bottomInset.toString())
+                WindowInsetsCompat.CONSUMED
+            }
+        }
     }
 
-    private fun getNavigationBarHeight(): Int {
-        val resourceId = activityPluginBinding?.activity?.resources?.getIdentifier("navigation_bar_height", "dimen", "android")
-        return if (resourceId != null && resourceId > 0) {
-            activityPluginBinding?.activity?.resources?.getDimensionPixelSize(resourceId) ?: 0
-        } else {
-            0
-        }
+    override fun onCancel(arguments: Any?) {
+        eventSink = null
     }
 
     // Implement ActivityAware methods

example/lib/main.dart

@@ -1,63 +1,76 @@
 import 'package:flutter/material.dart';
-import 'dart:async';
-
-import 'package:flutter/services.dart';
 import 'package:keyboard_height_plugin/keyboard_height_plugin.dart';
 
 void main() {
-  runApp(const MyApp());
+  runApp(MyApp());
 }
 
-class MyApp extends StatefulWidget {
-  const MyApp({super.key});
-
+class MyApp extends StatelessWidget {
   @override
-  State<MyApp> createState() => _MyAppState();
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: HomePage(),
+    );
+  }
 }
 
-class _MyAppState extends State<MyApp> {
-  String _platformVersion = 'Unknown';
-  final _keyboardHeightPlugin = KeyboardHeightPlugin();
+class HomePage extends StatefulWidget {
+  @override
+  _HomePageState createState() => _HomePageState();
+}
+
+class _HomePageState extends State<HomePage> {
+  double _keyboardHeight = 0;
+  final KeyboardHeightPlugin _keyboardHeightPlugin = KeyboardHeightPlugin();
 
   @override
   void initState() {
     super.initState();
-    initPlatformState();
-  }
-
-  // Platform messages are asynchronous, so we initialize in an async method.
-  Future<void> initPlatformState() async {
-    String platformVersion;
-    // Platform messages may fail, so we use a try/catch PlatformException.
-    // We also handle the message potentially returning null.
-    try {
-      platformVersion =
-          await _keyboardHeightPlugin.getPlatformVersion() ?? 'Unknown platform version';
-    } on PlatformException {
-      platformVersion = 'Failed to get platform version.';
-    }
-
-    // If the widget was removed from the tree while the asynchronous platform
-    // message was in flight, we want to discard the reply rather than calling
-    // setState to update our non-existent appearance.
-    if (!mounted) return;
-
-    setState(() {
-      _platformVersion = platformVersion;
+    _keyboardHeightPlugin.onKeyboardHeightChanged((double height) {
+      setState(() {
+        _keyboardHeight = height;
+      });
     });
   }
 
   @override
-  Widget build(BuildContext context) {
-    return MaterialApp(
-      home: Scaffold(
+    Widget build(BuildContext context) {
+      return Scaffold(
+        resizeToAvoidBottomInset: false,
         appBar: AppBar(
-          title: const Text('Plugin example app'),
+          title: Text('Keyboard Height'),
         ),
         body: Center(
-          child: Text('Running on: $_platformVersion\n'),
+            child: Stack(
+              children: [
+                Column(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: <Widget>[
+                    Text(
+                      'Keyboard height: $_keyboardHeight',
+                    ),
+                    SizedBox(height: 16),
+                    ElevatedButton(
+                      child: Text('Get Keyboard Height'),
+                      onPressed: () => {},
+                    ),
+                  ],
+                ),
+                Positioned(
+                  bottom: _keyboardHeight,
+                  left: 0,
+                  right: 0,
+                  child: TextField(
+                    decoration: InputDecoration(
+                    filled: true,
+                    fillColor: Colors.orange,
+                      hintText: 'Type here to open keyboard',
+                    ),
+                  ),
+                ),
+              ],
+          ),
         ),
-      ),
-    );
-  }
+      );
+    }
 }

flake.lock

@@ -0,0 +1,60 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1678901627,
+        "narHash": "sha256-U02riOqrKKzwjsxc/400XnElV+UtPUQWpANPlyazjH0=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "93a2b84fc4b70d9e089d029deacc3583435c2ed6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1676076353,
+        "narHash": "sha256-mdUtE8Tp40cZETwcq5tCwwLqkJVV1ULJQ5GKRtbshag=",
+        "owner": "AtaraxiaSjel",
+        "repo": "nixpkgs",
+        "rev": "5deb99bdccbbb97e7562dee4ba8a3ee3021688e6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "AtaraxiaSjel",
+        "ref": "update/flutter",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1680273054,
+        "narHash": "sha256-Bs6/5LpvYp379qVqGt9mXxxx9GSE789k3oFc+OAL07M=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "3364b5b117f65fe1ce65a3cdd5612a078a3b31e3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-unstable": "nixpkgs-unstable"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,48 @@
+{
+  description = "keyboard_height_plugin";
+  inputs = {
+    nixpkgs.url = "github:AtaraxiaSjel/nixpkgs/update/flutter";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, nixpkgs-unstable, flake-utils }: flake-utils.lib.eachDefaultSystem (system: let
+    pkgs = import nixpkgs {
+      inherit system;
+      config = {
+        android_sdk.accept_license = true;
+        allowUnfree = true;
+      };
+    };
+    unstable = import nixpkgs-unstable {
+      inherit system;
+    };
+    android = pkgs.androidenv.composeAndroidPackages {
+      # TODO: Find a way to pin these
+      #toolsVersion = "26.1.1";
+      #platformToolsVersion = "31.0.3";
+      #buildToolsVersions = [ "31.0.0" ];
+      #includeEmulator = true;
+      #emulatorVersion = "30.6.3";
+      platformVersions = [ "28" ];
+      includeSources = false;
+      includeSystemImages = true;
+      systemImageTypes = [ "default" ];
+      abiVersions = [ "x86_64" ];
+      includeNDK = false;
+      useGoogleAPIs = false;
+      useGoogleTVAddOns = false;
+    };
+    pinnedJDK = pkgs.jdk17;
+  in {
+    devShell = pkgs.mkShell {
+      buildInputs = with pkgs; [
+        flutter pinnedJDK android.platform-tools dart # Dart
+	      gitlint # Code hygiene
+	      ripgrep # General utilities 
+      ];
+
+      JAVA_HOME = pinnedJDK;
+    };
+  });
+}

lib/keyboard_height_plugin.dart

@@ -4,7 +4,7 @@ import 'package:flutter/services.dart';
 typedef KeyboardHeightCallback = void Function(double height);
 
 class KeyboardHeightPlugin {
-    static const EventChannel _keyboardHeightEventChannel = const EventChannel('keyboardHeightEventChannel');
+    static const EventChannel _keyboardHeightEventChannel = EventChannel('keyboardHeightEventChannel');
 
     StreamSubscription? _keyboardHeightSubscription;
 

pubspec.yaml

@@ -1,10 +1,11 @@
 name: keyboard_height_plugin
-description: A new Flutter plugin project.
-version: 0.0.1
-homepage:
+description: Flutter plugin that emits keyboard height before it shows (ios/android)
+version: 0.0.5
+repository: https://github.com/nschairer/keyboard_height_plugin
+publish_to: https://git.polynom.me/api/packages/Moxxy/pub
 
 environment:
-  sdk: '>=2.19.6 <3.0.0'
+  sdk: '>=2.18.0 <3.0.0'
   flutter: ">=2.5.0"
 
 dependencies: