Add Java tutorials.

In order to write an equivalent tutorial for Xamarin, I am first
following the UWP tutorial.

Fixed many little spelling mistakes and rephrased some sentences.

Fixed a crash when video is requested but the device has no camera.

Fixed a crash when opening an audio recording. (Linphone.Content.FilePath
returns a path with mixed '/' and '\'. I don't know why and I'm not sure
I understand why the file was auto-downloaded either)

.gitignore

@@ -12,9 +12,25 @@ java/build
 java/captures
 java/.externalNativeBuild
 java/.cxx
-swift/*/Podfile.lock
-swift/*/Pods/
-swift/*/*.xcodeproj/project.xcworkspace/xcuserdata/
-swift/*/*.xcodeproj/xcuserdata/
-swift/*/*.xcworkspace/xcuserdata/
-swift/*/build
+
+# C# / UWP Files / VS Specifiq files
+.vs/
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+*UpgradeLog*.htm
+AppPackages
+
+[Oo]bj/
+[Bb]in/
+
+ios/swift/*/Podfile.lock
+ios/swift/*/Pods/
+ios/swift/*/*.xcodeproj/project.xcworkspace/xcuserdata/
+ios/swift/*/*.xcodeproj/xcuserdata/
+ios/swift/*/*.xcworkspace/xcuserdata/
+ios/swift/*/build
+ios/swift/*/*.xcworkspace
+

.gitlab-ci-files/job-android.yml

@@ -0,0 +1,53 @@
+.job-android:
+
+  stage: build
+  tags: [ "docker-android" ]
+  image: gitlab.linphone.org:4567/bc/public/linphone-android/bc-dev-android:30
+
+job-android-hello-world:
+  extends: .job-android
+  script:
+    - cd android/kotlin/0-HelloWorld/
+    - ./gradlew assembleRelease
+
+job-android-account:
+  extends: .job-android
+  script:
+    - cd android/kotlin/1-AccountLogin/
+    - ./gradlew assembleRelease
+
+job-android-push-notifications:
+  extends: .job-android
+  script:
+    - cd android/kotlin/2-PushNotifications/
+    - ./gradlew assembleRelease
+
+job-android-basic-chat:
+  extends: .job-android
+  script:
+    - cd android/kotlin/5-BasicChat/
+    - ./gradlew assembleRelease
+
+job-android-advanced-chat:
+  extends: .job-android
+  script:
+    - cd android/kotlin/6-AdvancedChat/
+    - ./gradlew assembleRelease
+
+job-android-group-chat:
+  extends: .job-android
+  script:
+    - cd android/kotlin/7-GroupChat/
+    - ./gradlew assembleRelease
+
+job-android-incoming-call:
+  extends: .job-android
+  script:
+    - cd android/kotlin/3-IncomingCall/
+    - ./gradlew assembleRelease
+
+job-android-outgoing-call:
+  extends: .job-android
+  script:
+    - cd android/kotlin/4-OutgoingCall/
+    - ./gradlew assembleRelease

.gitlab-ci-files/job-windows.yml

@@ -0,0 +1,13 @@
+job-windows:
+
+  stage: build
+  tags: [ "windows" ]
+  script:
+    # Build VS project
+    #Remove MinGW of MSYS from PATH and add MINGW_TYPE for MSYS2
+    - echo %PATH%
+    - cd uwp\cs
+    - |
+      "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\msbuild.exe" -t:restore -verbosity:minimal 
+    - |
+      "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\msbuild.exe" TutorialsCS.sln /m /property:Configuration=Release /property:Platform=x64 -verbosity:quiet

.gitlab-ci.yml

@@ -0,0 +1,17 @@
+#################################################
+# Base configuration
+#################################################
+
+
+
+#################################################
+# Platforms to test
+#################################################
+
+
+include:
+  - '.gitlab-ci-files/job-android.yml'
+  - '.gitlab-ci-files/job-windows.yml'
+
+stages:
+ - build

README.md

@@ -0,0 +1,47 @@
+Linphone SDK tutorials
+====================
+
+This repository holds tutorials explaining how to set up [Linphone-SDK](https://gitlab.linphone.org/BC/public/linphone-sdk/) 
+in a Android / iOS / desktop projects and use it to implement some simple features.
+
+## License
+
+Copyright © Belledonne Communications
+
+Tutorials are published under [GNU/GPLv3 license](https://www.gnu.org/licenses/gpl-3.0.en.html), for free (open source). 
+Please make sure that you understand and agree with the terms of this license before using it (see LICENSE.txt file for details).
+
+## Android
+
+Even though Linphone's APIs are available in Java, Android tutorials have been created in Kotlin as it is the current standard for Android apps.
+
+Linphone-SDK will be downloaded automatically by gradle from our [Maven repository](https://linphone.org/maven_repository/org/linphone/linphone-sdk-android/).
+
+## iOS
+
+In the same way, iOS tutorials are written in Swift but the same can be achieved through Objective-C.
+
+Linphone-SDK binaries are fetched from our [Cocoapods repository](https://gitlab.linphone.org/BC/public/podspec.git) for iOS.
+
+## Desktop
+
+Desktop tutorials are in C#, leveraging on our Nuget packaging.
+
+## Java
+
+Java tutorials targeting the Desktop. If targeting Android, take a look at the Android tutorials instead.
+
+## Additional resources
+
+All tutorials require a SIP account to function, and if you don't have one you can create as many as you want and for free using our [free SIP service](https://subscribe.linphone.org/).
+
+You can check our [website](https://linphone.org/) for news, supported RFCs, licensing services, etc...
+
+Full API documentation is available for all of our supported languages:
+* [C++](http://linphone.org/snapshots/docs/liblinphone/latest/c++)
+* [C#](http://linphone.org/snapshots/docs/liblinphone/latest/cs)
+* [Java](http://linphone.org/snapshots/docs/liblinphone/latest/java)
+* [Swift](http://linphone.org/snapshots/docs/liblinphone/latest/swift)
+* [C](http://linphone.org/snapshots/docs/liblinphone/latest/c)
+
+Finally we also have a [wiki](https://wiki.linphone.org/xwiki/wiki/public/view/Main/) with articles on various subjects.

android/README.md

@@ -0,0 +1,13 @@
+Android tutorials
+====================
+
+Tutorials are written in Kotlin, but the same features can be achieved in Java.
+
+Tutorials are numbered 0 to 6, and we recommend you to read them in that order as features from previous tutorials are used in the next ones, such as account login.
+
+Each tutorial is a full project, so you can import it in Android Studio, build it and deploy it on a real device or an emulator.
+
+Code is being kept as short and simple as possible, and comments explain how and why things are being done. 
+You can focus on the Activity and build.gradle files, the rest being projects / UI files.
+
+Full Java API is available [here](http://linphone.org/snapshots/docs/liblinphone/latest/java).

android/kotlin/0-HelloWorld/.gitignore

@@ -0,0 +1,15 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

android/kotlin/0-HelloWorld/.idea/$CACHE_FILE$

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectInspectionProfilesVisibleTreeState">
+    <entry key="Project Default">
+      <profile-state>
+        <expanded-state>
+          <State />
+          <State>
+            <id>Android</id>
+          </State>
+          <State>
+            <id>CorrectnessLintAndroid</id>
+          </State>
+          <State>
+            <id>Gradle</id>
+          </State>
+          <State>
+            <id>LintAndroid</id>
+          </State>
+          <State>
+            <id>Probable bugsGradle</id>
+          </State>
+        </expanded-state>
+      </profile-state>
+    </entry>
+  </component>
+</project>

android/kotlin/0-HelloWorld/.idea/.gitignore

@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml

android/kotlin/0-HelloWorld/.idea/.name

@@ -0,0 +1 @@
+Hello World

android/kotlin/0-HelloWorld/.idea/codeStyles/Project.xml

@@ -1,6 +1,10 @@
 <component name="ProjectCodeStyleConfiguration">
   <code_scheme name="Project" version="173">
+    <JetCodeStyleSettings>
+      <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
+    </JetCodeStyleSettings>
     <codeStyleSettings language="XML">
+      <option name="FORCE_REARRANGE_MODE" value="1" />
       <indentOptions>
         <option name="CONTINUATION_INDENT_SIZE" value="4" />
       </indentOptions>
@@ -112,5 +116,8 @@
         </rules>
       </arrangement>
     </codeStyleSettings>
+    <codeStyleSettings language="kotlin">
+      <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
+    </codeStyleSettings>
   </code_scheme>
 </component>

android/kotlin/0-HelloWorld/.idea/codeStyles/codeStyleConfig.xml

@@ -0,0 +1,5 @@
+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="USE_PER_PROJECT_SETTINGS" value="true" />
+  </state>
+</component>

android/kotlin/0-HelloWorld/.idea/compiler.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="1.8" />
+  </component>
+</project>

android/kotlin/0-HelloWorld/.idea/deploymentTargetDropDown.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="deploymentTargetDropDown">
+    <targetSelectedWithDropDown>
+      <Target>
+        <type value="QUICK_BOOT_TARGET" />
+        <deviceKey>
+          <Key>
+            <type value="VIRTUAL_DEVICE_PATH" />
+            <value value="$USER_HOME$/.android/avd/Pixel_2_API_29.avd" />
+          </Key>
+        </deviceKey>
+      </Target>
+    </targetSelectedWithDropDown>
+    <timeTargetWasSelectedWithDropDown value="2021-08-25T15:48:59.707583Z" />
+  </component>
+</project>

android/kotlin/0-HelloWorld/.idea/gradle.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="testRunner" value="PLATFORM" />
+        <option name="disableWrapperSourceDistributionNotification" value="true" />
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="JDK" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveModulePerSourceSet" value="false" />
+        <option name="useQualifiedModuleNames" value="true" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

android/kotlin/0-HelloWorld/.idea/jarRepositories.xml

@@ -21,5 +21,10 @@
       <option name="name" value="Google" />
       <option name="url" value="https://dl.google.com/dl/android/maven2/" />
     </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven" />
+      <option name="name" value="maven" />
+      <option name="url" value="https://linphone.org/maven_repository" />
+    </remote-repository>
   </component>
 </project>

android/kotlin/0-HelloWorld/.idea/misc.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

android/kotlin/0-HelloWorld/.idea/vcs.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/../../.." vcs="Git" />
   </component>
 </project>

android/kotlin/0-HelloWorld/README.md

@@ -0,0 +1,8 @@
+Hello World tutorial
+====================
+
+The purpose of this tutorial is to explain how to add our SDK as a dependency of an Android project and how to create the `Core` object that all our APIs depends on.
+
+Start by taking a look at the `app/build.gradle` file to see how our Maven repository is being set up and how to add the gradle dependency on our SDK.
+
+The user interface will only display the `Core`'s version, but in the next tutorial you will learn how to use it to login your SIP account.

android/kotlin/0-HelloWorld/app/build.gradle

@@ -0,0 +1,48 @@
+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+}
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.3"
+
+    defaultConfig {
+        applicationId "org.linphone.helloworld"
+        minSdkVersion 23
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+}
+
+// We need to declare this repository to be able to use Liblinphone SDK
+repositories {
+    maven {
+        url "https://linphone.org/maven_repository"
+    }
+}
+
+dependencies {
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.3.2'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.2.1'
+    // Latest version is 5.0.x, using + to get the latest available
+    implementation 'org.linphone:linphone-sdk-android:5.0+'
+}

android/kotlin/0-HelloWorld/app/src/main/AndroidManifest.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.linphone.helloworld">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.HelloWorld">
+
+        <activity
+            android:name=".HelloWorldActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+
+        </activity>
+
+    </application>
+
+</manifest>

android/kotlin/0-HelloWorld/app/src/main/java/org/linphone/helloworld/HelloWorldActivity.kt

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2010-2020 Belledonne Communications SARL.
+ *
+ * This file is part of linphone-android
+ * (see https://www.linphone.org).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.linphone.helloworld
+
+import android.os.Bundle
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+import org.linphone.core.Factory
+
+class HelloWorldActivity: AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        // Check the app/build.gradle to see how to import the LibLinphone SDK !!!
+
+        setContentView(R.layout.hello_world_activity)
+        val coreVersion = findViewById<TextView>(R.id.core_version)
+
+        // Core is the main object of the SDK. You can't do much without it.
+       // To create a Core, we need the instance of the Factory.
+        val factory = Factory.instance()
+
+        // Some configuration can be done before the Core is created, for example enable debug logs.
+        factory.setDebugMode(true, "Hello Linphone")
+
+        // Your Core can use up to 2 configuration files, but that isn't mandatory.
+        // On Android the Core needs to have the application context to work.
+        // If you don't, the following method call will crash.
+        val core = factory.createCore(null, null, this)
+
+        // Now we can start using the Core object
+        coreVersion.text = core.version
+    }
+}

android/kotlin/0-HelloWorld/app/src/main/res/layout/hello_world_activity.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/core_version"
+        android:layout_centerInParent="true"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content" />
+
+</RelativeLayout>

android/kotlin/0-HelloWorld/app/src/main/res/values-night/themes.xml

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.HelloWorld" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_200</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/black</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>

android/kotlin/0-HelloWorld/app/src/main/res/values/colors.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>

android/kotlin/0-HelloWorld/app/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Hello World</string>
+</resources>

android/kotlin/0-HelloWorld/app/src/main/res/values/themes.xml

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.HelloWorld" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>

android/kotlin/0-HelloWorld/build.gradle

@@ -1,11 +1,13 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
+    ext.kotlin_version = "1.4.21"
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath "com.android.tools.build:gradle:4.0.0"
+        classpath "com.android.tools.build:gradle:4.1.1"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

android/kotlin/0-HelloWorld/gradle.properties

@@ -6,7 +6,7 @@
 # http://www.gradle.org/docs/current/userguide/build_environment.html
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
-org.gradle.jvmargs=-Xmx2048m
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
@@ -16,4 +16,6 @@ org.gradle.jvmargs=-Xmx2048m
 # https://developer.android.com/topic/libraries/support-library/androidx-rn
 android.useAndroidX=true
 # Automatically convert third-party libraries to use AndroidX
-android.enableJetifier=true
+android.enableJetifier=true
+# Kotlin code style for this project: "official" or "obsolete":
+kotlin.code.style=official

android/kotlin/0-HelloWorld/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Thu Jun 04 10:43:14 CEST 2020
+#Mon Jan 18 10:03:31 CET 2021
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip

android/kotlin/0-HelloWorld/settings.gradle

@@ -0,0 +1,2 @@
+include ':app'
+rootProject.name = "Hello World"

android/kotlin/1-AccountLogin/.gitignore

@@ -0,0 +1,15 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

android/kotlin/1-AccountLogin/.idea/$CACHE_FILE$

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectInspectionProfilesVisibleTreeState">
+    <entry key="Project Default">
+      <profile-state>
+        <expanded-state>
+          <State />
+          <State>
+            <id>Android</id>
+          </State>
+          <State>
+            <id>CorrectnessLintAndroid</id>
+          </State>
+          <State>
+            <id>Gradle</id>
+          </State>
+          <State>
+            <id>LintAndroid</id>
+          </State>
+          <State>
+            <id>Probable bugsGradle</id>
+          </State>
+        </expanded-state>
+      </profile-state>
+    </entry>
+  </component>
+</project>

android/kotlin/1-AccountLogin/.idea/.gitignore

@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml

android/kotlin/1-AccountLogin/.idea/.name

@@ -0,0 +1 @@
+Account Login

android/kotlin/1-AccountLogin/.idea/compiler.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="11" />
+  </component>
+</project>

android/kotlin/1-AccountLogin/.idea/gradle.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="testRunner" value="GRADLE" />
+        <option name="disableWrapperSourceDistributionNotification" value="true" />
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="JDK" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveModulePerSourceSet" value="false" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

android/kotlin/1-AccountLogin/.idea/jarRepositories.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="BintrayJCenter" />
+      <option name="name" value="BintrayJCenter" />
+      <option name="url" value="https://jcenter.bintray.com/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="Google" />
+      <option name="name" value="Google" />
+      <option name="url" value="https://dl.google.com/dl/android/maven2/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven" />
+      <option name="name" value="maven" />
+      <option name="url" value="https://linphone.org/maven_repository" />
+    </remote-repository>
+  </component>
+</project>

android/kotlin/1-AccountLogin/.idea/misc.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DesignSurface">
+    <option name="filePathToZoomLevelMap">
+      <map>
+        <entry key="app/src/main/res/layout/account_login_activity.xml" value="0.3223958333333333" />
+      </map>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="JDK" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>

android/kotlin/1-AccountLogin/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../../.." vcs="Git" />
+  </component>
+</project>

android/kotlin/1-AccountLogin/README.md

@@ -0,0 +1,10 @@
+Account login tutorial
+====================
+
+Now that you have set up Linphone-SDK in an Android project, let's start using it.
+
+We will see how to login on a SIP server using the `Core` object instanciated in the previous tutorial.
+
+If you don't have a SIP server yet, you can create an account for free using our [free SIP service](https://subscribe.linphone.org/).
+
+Once you'll be logged-in, you'll be able to continue to the next tutorials to make calls and send messages.

android/kotlin/1-AccountLogin/app/.gitignore

@@ -0,0 +1 @@
+/build

android/kotlin/1-AccountLogin/app/build.gradle

@@ -0,0 +1,50 @@
+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+}
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.3"
+
+    defaultConfig {
+        applicationId "org.linphone.accountlogin"
+        minSdkVersion 23
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+}
+
+// We need to declare this repository to be able to use Liblinphone SDK
+repositories {
+    maven {
+        url "https://linphone.org/maven_repository"
+    }
+}
+
+dependencies {
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.3.2'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.2.1'
+    // Latest version is 5.0.x, using + to get the latest available
+    implementation 'org.linphone:linphone-sdk-android:5.0+'
+}

android/kotlin/1-AccountLogin/app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

android/kotlin/1-AccountLogin/app/src/main/AndroidManifest.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.linphone.accountlogin">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.AccountLogin">
+
+        <activity
+            android:name=".AccountLoginActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+
+        </activity>
+
+    </application>
+
+</manifest>

android/kotlin/1-AccountLogin/app/src/main/java/org/linphone/accountlogin/AccountLoginActivity.kt

@@ -0,0 +1,169 @@
+/*
+ * Copyright (c) 2010-2020 Belledonne Communications SARL.
+ *
+ * This file is part of linphone-android
+ * (see https://www.linphone.org).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.linphone.accountlogin
+
+import android.os.Bundle
+import android.widget.Button
+import android.widget.EditText
+import android.widget.RadioGroup
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+import org.linphone.core.*
+import org.linphone.core.tools.Log
+
+class AccountLoginActivity: AppCompatActivity() {
+    private lateinit var core: Core
+
+    // Create a Core listener to listen for the callback we need
+    // In this case, we want to know about the account registration status
+    private val coreListener = object: CoreListenerStub() {
+        override fun onAccountRegistrationStateChanged(core: Core, account: Account, state: RegistrationState, message: String) {
+            // If account has been configured correctly, we will go through Progress and Ok states
+            // Otherwise, we will be Failed.
+            findViewById<TextView>(R.id.registration_status).text = message
+
+            if (state == RegistrationState.Failed || state == RegistrationState.Cleared) {
+                findViewById<Button>(R.id.connect).isEnabled = true
+            } else if (state == RegistrationState.Ok) {
+                findViewById<Button>(R.id.disconnect).isEnabled = true
+            }
+        }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        setContentView(R.layout.account_login_activity)
+
+        val factory = Factory.instance()
+        factory.setDebugMode(true, "Hello Linphone")
+        core = factory.createCore(null, null, this)
+
+        findViewById<Button>(R.id.connect).setOnClickListener {
+            login()
+            it.isEnabled = false
+        }
+
+        findViewById<Button>(R.id.disconnect).setOnClickListener {
+            unregister()
+            it.isEnabled = false
+        }
+
+        findViewById<Button>(R.id.delete).setOnClickListener {
+            delete()
+            it.isEnabled = false
+        }
+
+        val coreVersion = findViewById<TextView>(R.id.core_version)
+        coreVersion.text = core.version
+    }
+
+    private fun login() {
+        val username = findViewById<EditText>(R.id.username).text.toString()
+        val password = findViewById<EditText>(R.id.password).text.toString()
+        val domain = findViewById<EditText>(R.id.domain).text.toString()
+        // Get the transport protocol to use.
+        // TLS is strongly recommended
+        // Only use UDP if you don't have the choice
+        val transportType = when (findViewById<RadioGroup>(R.id.transport).checkedRadioButtonId) {
+            R.id.udp -> TransportType.Udp
+            R.id.tcp -> TransportType.Tcp
+            else -> TransportType.Tls
+        }
+
+        // To configure a SIP account, we need an Account object and an AuthInfo object
+        // The first one is how to connect to the proxy server, the second one stores the credentials
+
+        // The auth info can be created from the Factory as it's only a data class
+        // userID is set to null as it's the same as the username in our case
+        // ha1 is set to null as we are using the clear text password. Upon first register, the hash will be computed automatically.
+        // The realm will be determined automatically from the first register, as well as the algorithm
+        val authInfo = Factory.instance().createAuthInfo(username, null, password, null, null, domain, null)
+
+        // Account object replaces deprecated ProxyConfig object
+        // Account object is configured through an AccountParams object that we can obtain from the Core
+        val accountParams = core.createAccountParams()
+
+        // A SIP account is identified by an identity address that we can construct from the username and domain
+        val identity = Factory.instance().createAddress("sip:$username@$domain")
+        accountParams.identityAddress = identity
+
+        // We also need to configure where the proxy server is located
+        val address = Factory.instance().createAddress("sip:$domain")
+        // We use the Address object to easily set the transport protocol
+        address?.transport = transportType
+        accountParams.serverAddress = address
+        // And we ensure the account will start the registration process
+        accountParams.registerEnabled = true
+
+        // Now that our AccountParams is configured, we can create the Account object
+        val account = core.createAccount(accountParams)
+
+        // Now let's add our objects to the Core
+        core.addAuthInfo(authInfo)
+        core.addAccount(account)
+
+        // Also set the newly added account as default
+        core.defaultAccount = account
+
+        // Allow account to be removed
+        findViewById<Button>(R.id.delete).isEnabled = true
+
+        // To be notified of the connection status of our account, we need to add the listener to the Core
+        core.addListener(coreListener)
+        // We can also register a callback on the Account object
+        account.addListener { _, state, message ->
+            // There is a Log helper in org.linphone.core.tools package
+            Log.i("[Account] Registration state changed: $state, $message")
+        }
+
+        // Finally we need the Core to be started for the registration to happen (it could have been started before)
+        core.start()
+    }
+
+    private fun unregister() {
+        // Here we will disable the registration of our Account
+        val account = core.defaultAccount
+        account ?: return
+
+        val params = account.params
+        // Returned params object is const, so to make changes we first need to clone it
+        val clonedParams = params.clone()
+
+        // Now let's make our changes
+        clonedParams.registerEnabled = false
+
+        // And apply them
+        account.params = clonedParams
+    }
+
+    private fun delete() {
+        // To completely remove an Account
+        val account = core.defaultAccount
+        account ?: return
+        core.removeAccount(account)
+
+        // To remove all accounts use
+        core.clearAccounts()
+
+        // Same for auth info
+        core.clearAllAuthInfo()
+    }
+}

android/kotlin/1-AccountLogin/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>

android/kotlin/1-AccountLogin/app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
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+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
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+    <path
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+    <path
+        android:fillColor="#00000000"
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+    <path
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+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+    <path
+        android:fillColor="#00000000"
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+    <path
+        android:fillColor="#00000000"
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+    <path
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+        android:strokeColor="#33FFFFFF" />
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+    <path
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+    <path
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+</vector>

android/kotlin/1-AccountLogin/app/src/main/res/layout/account_login_activity.xml

@@ -0,0 +1,88 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/register_layout"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:gravity="center"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/core_version"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"/>
+
+    <EditText
+        android:id="@+id/username"
+        android:hint="Username"
+        android:inputType="textEmailAddress"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+    <EditText
+        android:id="@+id/password"
+        android:hint="Password"
+        android:inputType="textPassword"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+    <EditText
+        android:id="@+id/domain"
+        android:hint="Domain"
+        android:text="sip.linphone.org"
+        android:inputType="textUri"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+    <RadioGroup
+        android:id="@+id/transport"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+
+        <RadioButton
+            android:id="@+id/udp"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="UDP" />
+
+        <RadioButton
+            android:id="@+id/tcp"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="TCP" />
+
+        <RadioButton
+            android:id="@+id/tls"
+            android:checked="true"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="TLS" />
+
+    </RadioGroup>
+
+    <Button
+        android:id="@+id/connect"
+        android:text="Connect"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"/>
+
+    <Button
+        android:id="@+id/disconnect"
+        android:text="Disconnect"
+        android:enabled="false"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"/>
+
+    <Button
+        android:id="@+id/delete"
+        android:text="Delete"
+        android:enabled="false"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"/>
+
+    <TextView
+        android:id="@+id/registration_status"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"/>
+
+</LinearLayout>

android/kotlin/1-AccountLogin/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

android/kotlin/1-AccountLogin/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

android/kotlin/1-AccountLogin/app/src/main/res/values-night/themes.xml

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.AccountLogin" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_200</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/black</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>

android/kotlin/1-AccountLogin/app/src/main/res/values/colors.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>

android/kotlin/1-AccountLogin/app/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Account Login</string>
+</resources>

android/kotlin/1-AccountLogin/app/src/main/res/values/themes.xml

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.AccountLogin" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>

android/kotlin/1-AccountLogin/build.gradle

@@ -0,0 +1,26 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    ext.kotlin_version = "1.4.21"
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath "com.android.tools.build:gradle:4.1.1"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

android/kotlin/1-AccountLogin/gradle.properties

@@ -0,0 +1,21 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app"s APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Automatically convert third-party libraries to use AndroidX
+android.enableJetifier=true
+# Kotlin code style for this project: "official" or "obsolete":
+kotlin.code.style=official

android/kotlin/1-AccountLogin/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Mon Jan 18 10:29:47 CET 2021
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip

android/kotlin/1-AccountLogin/gradlew

@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$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" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

android/kotlin/1-AccountLogin/gradlew.bat

@@ -0,0 +1,84 @@
+@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 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=
+
+@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 init
+
+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 init
+
+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
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+: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 %CMD_LINE_ARGS%
+
+: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/kotlin/1-AccountLogin/settings.gradle

@@ -0,0 +1,2 @@
+include ':app'
+rootProject.name = "Account Login"

android/kotlin/2-PushNotifications/.gitignore

@@ -0,0 +1,15 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

android/kotlin/2-PushNotifications/.idea/$CACHE_FILE$

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectInspectionProfilesVisibleTreeState">
+    <entry key="Project Default">
+      <profile-state>
+        <expanded-state>
+          <State />
+          <State>
+            <id>Android</id>
+          </State>
+          <State>
+            <id>CorrectnessLintAndroid</id>
+          </State>
+          <State>
+            <id>Gradle</id>
+          </State>
+          <State>
+            <id>LintAndroid</id>
+          </State>
+          <State>
+            <id>Probable bugsGradle</id>
+          </State>
+        </expanded-state>
+      </profile-state>
+    </entry>
+  </component>
+</project>

android/kotlin/2-PushNotifications/.idea/.gitignore

@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml

android/kotlin/2-PushNotifications/.idea/.name

@@ -0,0 +1 @@
+Push notifications

android/kotlin/2-PushNotifications/.idea/compiler.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="1.8" />
+  </component>
+</project>

android/kotlin/2-PushNotifications/.idea/gradle.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="testRunner" value="PLATFORM" />
+        <option name="disableWrapperSourceDistributionNotification" value="true" />
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="JDK" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveModulePerSourceSet" value="false" />
+        <option name="useQualifiedModuleNames" value="true" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

android/kotlin/2-PushNotifications/.idea/jarRepositories.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="BintrayJCenter" />
+      <option name="name" value="BintrayJCenter" />
+      <option name="url" value="https://jcenter.bintray.com/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="Google" />
+      <option name="name" value="Google" />
+      <option name="url" value="https://dl.google.com/dl/android/maven2/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven" />
+      <option name="name" value="maven" />
+      <option name="url" value="https://linphone.org/maven_repository" />
+    </remote-repository>
+  </component>
+</project>

android/kotlin/2-PushNotifications/.idea/misc.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="JDK" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>