Convert language related classes to Kotlin

app/src/main/java/ai/elimu/content_provider/language/LanguageListDialogFragment.kt

@@ -0,0 +1,110 @@
+package ai.elimu.content_provider.language
+
+import ai.elimu.content_provider.MainActivity
+import ai.elimu.content_provider.R
+import ai.elimu.content_provider.util.SharedPreferencesHelper
+import ai.elimu.model.v2.enums.Language
+import android.content.Intent
+import android.os.Bundle
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.recyclerview.widget.DividerItemDecoration
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.google.android.material.bottomsheet.BottomSheetDialogFragment
+
+/**
+ *
+ * A fragment that shows a list of items as a modal bottom sheet.
+ *
+ * You can show this modal bottom sheet from your activity like this:
+ * <pre>
+ * LanguageListDialogFragment.newInstance().show(getSupportFragmentManager(), "dialog");
+</pre> *
+ */
+class LanguageListDialogFragment : BottomSheetDialogFragment() {
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(
+            R.layout.fragment_language_list_dialog_list_dialog,
+            container,
+            false
+        )
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        val recyclerView = view as RecyclerView
+        recyclerView.layoutManager = LinearLayoutManager(context)
+        recyclerView.adapter = LanguageAdapter()
+        recyclerView.addItemDecoration(
+            DividerItemDecoration(
+                context,
+                DividerItemDecoration.VERTICAL
+            )
+        )
+
+        isCancelable = false
+    }
+
+    override fun getTheme(): Int {
+        return R.style.BottomSheetDialogTheme
+    }
+
+
+    private inner class ViewHolder(inflater: LayoutInflater, parent: ViewGroup?) :
+        RecyclerView.ViewHolder(
+            inflater.inflate(
+                R.layout.fragment_language_list_dialog_list_dialog_item,
+                parent,
+                false
+            )
+        ) {
+        val text: TextView =
+            itemView.findViewById(R.id.text)
+    }
+
+
+    private inner class LanguageAdapter : RecyclerView.Adapter<ViewHolder>() {
+        private val languages = Language.entries.toTypedArray()
+
+        override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+            return ViewHolder(LayoutInflater.from(parent.context), parent)
+        }
+
+        override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+            val language = languages[position]
+            holder.text.text = language.englishName + " (" + language.nativeName + ")"
+            holder.text.setOnClickListener(object : View.OnClickListener {
+                override fun onClick(v: View) {
+                    Log.i(javaClass.name, "onClick")
+                    Log.i(javaClass.name, "language: $language")
+                    SharedPreferencesHelper.storeLanguage(context, language)
+                    val mainActivityIntent = Intent(
+                        context,
+                        MainActivity::class.java
+                    )
+                    startActivity(mainActivityIntent)
+                    activity?.finish()
+                }
+            })
+        }
+
+        override fun getItemCount(): Int {
+            return languages.size
+        }
+    }
+
+    companion object {
+        @JvmStatic
+        fun newInstance(): LanguageListDialogFragment {
+            val fragment = LanguageListDialogFragment()
+            return fragment
+        }
+    }
+}

app/src/main/java/ai/elimu/content_provider/language/SelectLanguageActivity.kt

@@ -0,0 +1,23 @@
+package ai.elimu.content_provider.language
+
+import ai.elimu.content_provider.R
+import ai.elimu.content_provider.language.LanguageListDialogFragment.Companion.newInstance
+import android.os.Bundle
+import android.util.Log
+import androidx.appcompat.app.AppCompatActivity
+
+class SelectLanguageActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        Log.i(javaClass.name, "onCreate")
+        super.onCreate(savedInstanceState)
+
+        setContentView(R.layout.activity_select_language)
+    }
+
+    override fun onStart() {
+        Log.i(javaClass.name, "onStart")
+        super.onStart()
+
+        newInstance().show(supportFragmentManager, "dialog")
+    }
+}