Whole codebase migrated to Kotlin

.gitignore

@@ -14,3 +14,4 @@
 .externalNativeBuild
 .cxx
 local.properties
+/.idea/kotlinc.xml

app/build.gradle

@@ -1,5 +1,6 @@
 plugins {
     id 'com.android.application'
+    id 'org.jetbrains.kotlin.android'
 }
 
 android {
@@ -27,6 +28,11 @@ android {
         sourceCompatibility JavaVersion.VERSION_11
         targetCompatibility JavaVersion.VERSION_11
     }
+
+    kotlinOptions {
+        jvmTarget = "11"
+    }
+
     namespace 'github.umer0586.sensorserver'
 /*    buildFeatures {
         viewBinding true
@@ -51,6 +57,9 @@ dependencies {
     implementation 'com.github.ybq:Android-SpinKit:1.4.0'
 
     implementation 'com.github.cachapa:ExpandableLayout:2.9.2'
+    implementation 'androidx.core:core-ktx:1.10.1'
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:1.8.20"
+
 
 }
 

app/src/main/java/github/umer0586/sensorserver/activities/AboutActivity.kt

@@ -0,0 +1,46 @@
+package github.umer0586.sensorserver.activities
+
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import android.view.View
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.widget.AppCompatTextView
+import github.umer0586.sensorserver.BuildConfig
+import github.umer0586.sensorserver.R
+
+class AboutActivity : AppCompatActivity()
+{
+
+
+    override fun onCreate(savedInstanceState: Bundle?)
+    {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_about)
+
+        findViewById<View>(R.id.donationBtn).setOnClickListener {
+            openLink("http://www.buymeacoffee.com/umerfarooq")
+        }
+        findViewById<View>(R.id.sourceCodeBtn).setOnClickListener {
+            openLink("http://github.com/umer0586/SensorServer")
+        }
+
+        val version = findViewById<AppCompatTextView>(R.id.app_version)
+        version.text = "v" + BuildConfig.VERSION_NAME
+    }
+
+    private fun openLink(link: String)
+    {
+        val intent = Intent(Intent.ACTION_VIEW)
+        if (intent.resolveActivity(applicationContext.packageManager) != null)
+        {
+            intent.data = Uri.parse(link)
+            startActivity(Intent.createChooser(intent, "Select Browser"))
+        }
+        else
+        {
+            Toast.makeText(applicationContext, "Browser app not found", Toast.LENGTH_SHORT).show()
+        }
+    }
+}

app/src/main/java/github/umer0586/sensorserver/activities/DeviceAxisActivity.kt

@@ -0,0 +1,31 @@
+package github.umer0586.sensorserver.activities
+
+import android.graphics.drawable.Drawable
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.widget.AppCompatImageView
+import github.umer0586.sensorserver.R
+import java.io.IOException
+
+class DeviceAxisActivity : AppCompatActivity()
+{
+
+
+    override fun onCreate(savedInstanceState: Bundle?)
+    {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_device_axis)
+        val deviceAxisImage = findViewById<AppCompatImageView>(R.id.device_axis)
+        try
+        {
+            val ims = assets.open("axis_device.png")
+            val d = Drawable.createFromStream(ims, null)
+            deviceAxisImage.setImageDrawable(d)
+            ims.close()
+        }
+        catch (ex: IOException)
+        {
+            return
+        }
+    }
+}