Pobieranie walut wdrożone do aplikacji

Projekt4/app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-permission android:name="android.permission.INTERNET"/>
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"

Projekt4/app/src/main/java/com/example/projekt4/FirstFragment.java

 package com.example.projekt4;
 
 import android.os.Bundle;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.LinearLayout;
+import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.fragment.app.Fragment;
 import androidx.navigation.fragment.NavHostFragment;
 
 import com.example.projekt4.databinding.FragmentFirstBinding;
+import com.example.waluty.ExchangeRatesTable;
+import com.example.waluty.ObslugaNBP;
+import com.example.waluty.Rate;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 
 public class FirstFragment extends Fragment {
+    private ExecutorService watkiPobierajace = Executors.newSingleThreadExecutor(); // albo fixedThreadPool
 
     private FragmentFirstBinding binding;
 
@@ -20,7 +30,6 @@ public class FirstFragment extends Fragment {
             @NonNull LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState
     ) {
-
         binding = FragmentFirstBinding.inflate(inflater, container, false);
         return binding.getRoot();
 
@@ -33,6 +42,43 @@ public class FirstFragment extends Fragment {
                 NavHostFragment.findNavController(FirstFragment.this)
                         .navigate(R.id.action_FirstFragment_to_SecondFragment)
         );
+
+        binding.buttonPobierzBiezace.setOnClickListener(v -> {
+            wykonajCalePobieranie();
+        });
+    }
+
+    private void wykonajCalePobieranie() {
+        Log.d("Waluty", "pobieranie rozpoczęte");
+        // komunikacji sieciowej nie wolno robić w wątku głównym
+        watkiPobierajace.submit(() -> {
+            Log.d("Waluty", "a kuku 1");
+            ExchangeRatesTable table = ObslugaNBP.pobierzBiezaceKursy();
+            Log.d("Waluty", "a kuku 2");
+            // jednak zmiany w wyglądzie UI powinny być wykonane przez wątek główny
+            this.getActivity().runOnUiThread(() -> {
+                odswiezWidok(table);
+            });
+        });
+        Log.d("Waluty", "pobieranie zlecone");
+    }
+
+    private void odswiezWidok(ExchangeRatesTable table) {
+        Log.d("Waluty", "odswiezWidok");
+        // gdy mamy binding, nie trzeba już find
+        TextView textViewStatus = binding.textViewStatus;
+        LinearLayout ll = binding.linearLayoutWaluty;
+        if(table == null) {
+            textViewStatus.setText(R.string.brak_danych);
+        } else {
+            textViewStatus.setText(table.toString());
+            ll.removeAllViews();
+            for(Rate rate : table.getRates()) {
+                TextView textView = new TextView(this.getContext());
+                textView.setText(rate.toString());
+                ll.addView(textView);
+            }
+        }
     }
 
     @Override

Projekt4/app/src/main/java/com/example/waluty/ObslugaNBP.java

@@ -20,7 +20,7 @@ import org.w3c.dom.NodeList;
 import org.xml.sax.SAXException;
 
 public class ObslugaNBP {
-    private static final String ADRES = "http://api.nbp.pl/api/exchangerates/tables";
+    private static final String ADRES = "https://api.nbp.pl/api/exchangerates/tables";
 
     /** Pobiera tabelę z bieżącymi kursami walut.
      * Zwraca null w przypadku błędów.

Projekt4/app/src/main/res/layout/fragment_first.xml

 <?xml version="1.0" encoding="utf-8"?>
-<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".FirstFragment">
 
-    <androidx.constraintlayout.widget.ConstraintLayout
+    <Button
+        android:id="@+id/button_pobierz_biezace"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/pobierz"
+        app:layout_constraintEnd_toStartOf="@id/button_first"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/button_first"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/next"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@id/button_pobierz_biezace"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/text_view_status"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:padding="16dp">
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="status"
+        android:textAlignment="center"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/button_pobierz_biezace" />
 
-        <Button
-            android:id="@+id/button_first"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:text="@string/next"
-            app:layout_constraintBottom_toTopOf="@id/textview_first"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent" />
+    <ScrollView
+        android:id="@+id/scroll_lista_walut"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/text_view_status">
 
-        <TextView
-            android:id="@+id/textview_first"
-            android:layout_width="wrap_content"
+        <LinearLayout
+            android:id="@+id/linear_layout_waluty"
+            android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:layout_marginTop="16dp"
-            android:text="@string/lorem_ipsum"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/button_first" />
-    </androidx.constraintlayout.widget.ConstraintLayout>
-</androidx.core.widget.NestedScrollView>
+            android:orientation="vertical" />
+    </ScrollView>
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file

Projekt4/app/src/main/res/values/strings.xml

@@ -43,4 +43,6 @@
         libero vel nunc consequat, quis tincidunt nisl eleifend. Cras bibendum enim a justo luctus
         vestibulum. Fusce dictum libero quis erat maximus, vitae volutpat diam dignissim.
     </string>
+    <string name="pobierz">Pobierz bieżące</string>
+    <string name="brak_danych">Brak danych</string>
 </resources>
\ No newline at end of file