Change mainactivity to kotlin

app/src/main/java/rrdl/linuxpackagefinder/MainActivity.kt

@@ -0,0 +1,87 @@
+package rrdl.linuxpackagefinder
+
+import android.content.DialogInterface
+import android.support.v7.app.AlertDialog
+import android.support.v7.app.AppCompatActivity
+import android.os.Bundle
+import android.util.Log
+import android.text.Editable
+import android.text.TextWatcher
+import android.view.View
+import android.widget.AdapterView
+import android.widget.ArrayAdapter
+import android.widget.EditText
+import android.widget.ListView
+import android.widget.Toast
+
+import java.io.BufferedReader
+import java.io.IOException
+import java.io.InputStream
+import java.io.InputStreamReader
+import java.util.ArrayList
+
+class MainActivity : AppCompatActivity() {
+    internal var l: ListView
+    internal var S: EditText
+
+    @Override
+    protected fun onCreate(savedInstanceState: Bundle) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+
+        Toast.makeText(getApplicationContext(), "Total available packages : 57957", Toast.LENGTH_SHORT).show()
+
+        try {
+
+            val stream = getBaseContext().getAssets().open("packages.txt")
+            val `in` = BufferedReader(InputStreamReader(stream, "UTF-8"))
+            var str: String
+            val lines = ArrayList()
+
+            while ((str = `in`.readLine()) != null) {
+                lines.add(str)
+            }
+            `in`.close()
+            l = findViewById(R.id.List) as ListView
+            val adapter = ArrayAdapter(getApplicationContext(), R.layout.item, R.id.textView, lines)
+            l.setAdapter(adapter)
+            l.setTextFilterEnabled(true)
+            l.setOnItemClickListener(object : AdapterView.OnItemClickListener() {
+                @Override
+                fun onItemClick(parent: AdapterView<*>, view: View, position: Int, id: Long) {
+                    val Bld = AlertDialog.Builder(this@MainActivity)
+                    Bld.setMessage("To install this package , in terminal write : \n sudo apt-get install " + l.getItemAtPosition(position).toString())
+                    Bld.setCancelable(false)
+                    Bld.setPositiveButton("OK", object : DialogInterface.OnClickListener() {
+                        fun onClick(dialog: DialogInterface, id: Int) {
+                            dialog.cancel()
+                        }
+                    })
+                    val A = Bld.create()
+                    A.show()
+
+                }
+            })
+            S = findViewById(R.id.editText) as EditText
+            S.addTextChangedListener(object : TextWatcher() {
+                @Override
+                fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {
+
+                }
+
+                @Override
+                fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
+                    adapter.getFilter().filter(S.getText().toString())
+                }
+
+                @Override
+                fun afterTextChanged(s: Editable) {
+
+                }
+            })
+
+        } catch (e: IOException) {
+            Log.i("exception", e.toString())
+        }
+    }
+}