Revert "Fixes for new flutter verion"

android/build.gradle

@@ -2,14 +2,14 @@ group 'com.peoplewareinnovations.bluetooth_thermal_printer'
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.5.20'
+    ext.kotlin_version = '1.3.50'
     repositories {
         google()
         jcenter()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.3.0'
+        classpath 'com.android.tools.build:gradle:3.5.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }

android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip

android/src/main/kotlin/com/peoplewareinnovations/bluetooth_thermal_printer/BluetoothThermalPrinterPlugin.kt

@@ -101,19 +101,7 @@ class BluetoothThermalPrinterPlugin: FlutterPlugin, MethodCallHandler{
           }
         }
       }
-     }else if (call.method == "disconnectPrinter") {
-      GlobalScope.launch(Dispatchers.Main) {
-        if(outputStream != null) {
-          outputStream = disconnect()?.also {
-            //result.success("true")
-            //Toast.makeText(this@MainActivity, "Connected to printer", Toast.LENGTH_SHORT).show()
-          }.apply {
-            result.success("true")
-            //Log.d(TAG, "finished: Connection state:$state")
-          }
-        }
-      }
-     } else if (call.method == "writeBytes") {
+    }else if (call.method == "writeBytes") {
 
       var lista: List<Int> = call.arguments as List<Int>
       var bytes: ByteArray = "\n".toByteArray()
@@ -242,40 +230,6 @@ class BluetoothThermalPrinterPlugin: FlutterPlugin, MethodCallHandler{
     }
   }
 
-  private suspend fun disconnect(): OutputStream? {
-    state = "false"
-    return withContext(Dispatchers.IO) {
-      var outputStream: OutputStream? = outputStream
-      val bluetoothAdapter = BluetoothAdapter.getDefaultAdapter()
-      if (bluetoothAdapter != null && bluetoothAdapter.isEnabled) {
-        try {
-          if(mac.length>0) {
-          val bluetoothAddress = mac
-          val bluetoothDevice = bluetoothAdapter.getRemoteDevice(bluetoothAddress)
-          var bluetoothSocket = bluetoothDevice.createRfcommSocketToServiceRecord(
-                  UUID.fromString("00001101-0000-1000-8000-00805F9B34FB")
-          )
-          bluetoothSocket.close()
-          //bluetoothSocket=null
-        }
-          Log.d(TAG, "Disconnected: ")
-          outputStream?.close()
-          outputStream=null
-        } catch (e: Exception){
-          state = "false"
-          var code:Int = e.hashCode() //1535159 off //
-          Log.d(TAG, "connect: ${e.message} code $code")
-          outputStream?.close()
-        }
-      }else{
-        state = "false"
-        outputStream=null
-        Log.d(TAG, "Adapter problem")
-      }
-      outputStream
-    }
-  }
-
   private fun getLinkedDevices():List<String>{
 
     val listItems: MutableList<String> = mutableListOf()
@@ -373,3 +327,4 @@ class BluetoothThermalPrinterPlugin: FlutterPlugin, MethodCallHandler{
     channel.setMethodCallHandler(null)
   }
 }
+

example/android/app/build.gradle

@@ -26,7 +26,7 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 31
+    compileSdkVersion 29
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
@@ -40,7 +40,7 @@ android {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.peoplewareinnovations.bluetooth_thermal_printer_example"
         minSdkVersion 16
-        targetSdkVersion 31
+        targetSdkVersion 29
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }

example/android/app/src/main/AndroidManifest.xml

@@ -5,9 +5,8 @@
          In most cases you can leave this as-is, but you if you want to provide
          additional functionality it is fine to subclass or reimplement
          FlutterApplication and put your custom class here. -->
-
-    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
     <application
+        android:name="io.flutter.app.FlutterApplication"
         android:label="bluetooth_thermal_printer_example"
         android:icon="@mipmap/ic_launcher">
         <activity
@@ -16,8 +15,7 @@
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
-            android:windowSoftInputMode="adjustResize"
-            android:exported="true">
+            android:windowSoftInputMode="adjustResize">
             <!-- Specifies an Android theme to apply to this Activity as soon as
                  the Android process has started. This theme is visible to the user
                  while the Flutter UI initializes. After that, this theme continues

example/android/build.gradle

@@ -1,12 +1,12 @@
 buildscript {
-    ext.kotlin_version = '1.7.10'
+    ext.kotlin_version = '1.3.50'
     repositories {
         google()
         jcenter()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.4.0'
+        classpath 'com.android.tools.build:gradle:3.5.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
@@ -26,6 +26,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-tasks.register("clean", Delete) {
+task clean(type: Delete) {
     delete rootProject.buildDir
 }

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip

example/lib/main.dart

@@ -1,7 +1,7 @@
 import 'dart:async';
 
 import 'package:bluetooth_thermal_printer/bluetooth_thermal_printer.dart';
-import 'package:esc_pos_utils_plus/esc_pos_utils.dart';
+import 'package:esc_pos_utils/esc_pos_utils.dart';
 import 'package:flutter/material.dart';
 
 void main() {
@@ -23,15 +23,15 @@ class _MyAppState extends State<MyApp> {
   List availableBluetoothDevices = [];
 
   Future<void> getBluetooth() async {
-    final List? bluetooths = await BluetoothThermalPrinter.getBluetooths;
+    final List bluetooths = await BluetoothThermalPrinter.getBluetooths;
     print("Print $bluetooths");
     setState(() {
-      availableBluetoothDevices = bluetooths!;
+      availableBluetoothDevices = bluetooths;
     });
   }
 
   Future<void> setConnect(String mac) async {
-    final String? result = await BluetoothThermalPrinter.connect(mac);
+    final String result = await BluetoothThermalPrinter.connect(mac);
     print("state conneected $result");
     if (result == "true") {
       setState(() {
@@ -41,7 +41,7 @@ class _MyAppState extends State<MyApp> {
   }
 
   Future<void> printTicket() async {
-    String? isConnected = await BluetoothThermalPrinter.connectionStatus;
+    String isConnected = await BluetoothThermalPrinter.connectionStatus;
     if (isConnected == "true") {
       List<int> bytes = await getTicket();
       final result = await BluetoothThermalPrinter.writeBytes(bytes);
@@ -52,7 +52,7 @@ class _MyAppState extends State<MyApp> {
   }
 
   Future<void> printGraphics() async {
-    String? isConnected = await BluetoothThermalPrinter.connectionStatus;
+    String isConnected = await BluetoothThermalPrinter.connectionStatus;
     if (isConnected == "true") {
       List<int> bytes = await getGraphicsTicket();
       final result = await BluetoothThermalPrinter.writeBytes(bytes);