Widget DatePicker en la actividad para agregar receta

app/src/main/java/com/terratenientes/medicalhealth/RecetaActivity.kt

@@ -13,6 +13,8 @@ import android.widget.Toast
 import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
 import com.terratenientes.medicalhealth.databinding.ActivityRecetaBinding
+import com.terratenientes.medicalhealth.utilidad.DatePickerFragment
+import java.util.Date
 
 class RecetaActivity : AppCompatActivity(), OnItemSelectedListener {
     private lateinit var binding : ActivityRecetaBinding
@@ -33,6 +35,9 @@ class RecetaActivity : AppCompatActivity(), OnItemSelectedListener {
         binding.btnAgregarReceta.setOnClickListener {
             agregarReceta()
         }
+        binding.tvDatepicker.setOnClickListener{
+            showPickerDialog()
+        }
     }
     @SuppressLint("Range")
     private fun obtenerNombrePacientes() : ArrayList<String>{
@@ -57,12 +62,13 @@ class RecetaActivity : AppCompatActivity(), OnItemSelectedListener {
         val edadPaciente = (binding.etEdadPaciente.text.toString()).toInt()
         val pesoPaciente = (binding.etPesoPaciente.text.toString()).toDouble()
         val medicamento= binding.etRecetaMedicamento.text.toString()
-        val fecha=binding.etFecha.text.toString()
+        val fecha=binding.tvFecha.text.toString()
         val dosis = binding.etDosisMedicamento.text.toString()
         val duracion= binding.etDuracion.text.toString()
         val receta = Receta(nombrePaciente,edadPaciente,pesoPaciente,medicamento,fecha,dosis,duracion)
         db.agregarReceta(receta)
         Toast.makeText(this@RecetaActivity , "RECETA AGREGADA CORRECTAMENTE", Toast.LENGTH_LONG).show()
+        finish()
     }
 
     override fun onItemSelected(p0: AdapterView<*>?, p1: View?, p2: Int, p3: Long) {
@@ -74,4 +80,13 @@ class RecetaActivity : AppCompatActivity(), OnItemSelectedListener {
     override fun onNothingSelected(p0: AdapterView<*>?) {
 
     }
+
+    private fun showPickerDialog() {
+        val datePicker = DatePickerFragment{day, month, year -> obtenerFechaSeleccionada(day, month, year)}
+        datePicker.show(supportFragmentManager,"datePicker")
+    }
+
+    private fun obtenerFechaSeleccionada (day: Int, month: Int, year: Int) {
+        binding.tvFecha.text = "$day/$month/$year"
+    }
 }

app/src/main/java/com/terratenientes/medicalhealth/utilidad/DatePickerFragment.kt

@@ -0,0 +1,23 @@
+package com.terratenientes.medicalhealth.utilidad
+
+import android.app.DatePickerDialog
+import android.app.Dialog
+import android.content.Context
+import android.os.Bundle
+import android.widget.DatePicker
+import androidx.fragment.app.DialogFragment
+import java.util.Calendar
+
+class DatePickerFragment (val listener: (day: Int, month: Int, year: Int) -> Unit): DialogFragment(), DatePickerDialog.OnDateSetListener {
+    override fun onDateSet(view: DatePicker?, year: Int, month: Int, dayOfMonth: Int) {
+        listener(dayOfMonth, month, year)
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val c: Calendar = Calendar.getInstance()
+        val day: Int = c.get(Calendar.DAY_OF_MONTH)
+        val month: Int = c.get(Calendar.MONTH)
+        val year: Int = c.get(Calendar.YEAR)
+        return DatePickerDialog(activity as Context, this@DatePickerFragment, year, month, day)
+    }
+}

app/src/main/res/layout/activity_receta.xml

@@ -51,15 +51,36 @@
         android:hint="@string/receta_medicamento"
         android:layout_gravity="center_horizontal"
         />
-    <EditText
+    <GridLayout
-        android:id="@+id/et_fecha"
-        android:layout_marginTop="10dp"
         android:layout_width="300dp"
         android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:columnCount="2"
+        android:rowCount="1">
+        <TextView
+            android:id="@+id/tv_fecha"
+            android:layout_marginTop="10dp"
+            android:layout_width="200dp"
+            android:layout_height="match_parent"
             android:hint="@string/receta_fecha_paciente"
             android:layout_gravity="center_horizontal"
+            android:textSize="20sp"
             android:inputType="date"
-        />
+            android:layout_columnWeight="0"
+            android:layout_column="0"
+            android:layout_row="0"/>
+        <TextView
+            android:id="@+id/tv_datepicker"
+            android:layout_height="match_parent"
+            android:layout_width="100dp"
+            android:layout_marginTop="10dp"
+            android:textColor="@color/primaryColor"
+            android:text="calendario"
+            android:textSize="20sp"
+            android:layout_columnWeight="1"
+            android:layout_column="1"
+            android:layout_row="0"/>
+    </GridLayout>
     <EditText
         android:id="@+id/et_dosis_medicamento"
         android:layout_marginTop="10dp"