Update API Interface to pass city, metrics and API key as parameter into method.

Prepared UI with TextViews and ImageViews.
Import of all Images as Drawable Resources.

app/src/main/java/fr/romanet/vj/apps/myweather/ShowTemparature.java

@@ -6,6 +6,7 @@ import androidx.appcompat.widget.Toolbar;
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.widget.TextView;
@@ -44,29 +45,40 @@ public class ShowTemparature extends AppCompatActivity {
 
         textView2 = (TextView) findViewById(R.id.textView2);
 
+        // - Build Retrofit API tool
         Retrofit retrofit = new Retrofit.Builder()
                 .baseUrl("https://api.openweathermap.org/data/2.5/")
                 .addConverterFactory(GsonConverterFactory.create())
                 .build();
 
+        // - Build Interface with Retrofit
         JsonApiInterfce jsonApiInterfce = retrofit.create(JsonApiInterfce.class);
-        Call<Weather> call = jsonApiInterfce.getPost();
+        Call<Weather> call = jsonApiInterfce.getPost(currentCityName, "metric", "0ac5802392867db8e1ae4f91529f7890");
 
+        // - 'Execute' the GET query with 'enqueue' method, Retrofit will create an AsyncTask that avoids UI Thread freeze Exception.
         call.enqueue(new Callback<Weather>() {
+
+            // - If GET has an answer...
             @Override
             public void onResponse(Call<Weather> call, Response<Weather> response) {
+
+                // - Check if that answer is not an error (like 500, 404, etc)
                 if(! response.isSuccessful()){
                     textView2.setText("Code: " + response.code());
                     return;
                 }
 
+                // - If it's all right, update Activity Objects with JSON parsed answer
                 Weather weather = response.body();
-                textView2.append(weather.get_weatherDescription().get_description());
+                textView2.append(weather.get_temps().get_temp_feels_like());
 
             }
 
+            // - If GET has no answer...
             @Override
             public void onFailure(Call<Weather> call, Throwable t) {
+
+                // - Display error message
                 textView2.setText("Error: " + t.getMessage());
             }
         });

app/src/main/java/fr/romanet/vj/apps/myweather/network/JsonApiInterfce.java

@@ -3,11 +3,11 @@ package fr.romanet.vj.apps.myweather.network;
 import fr.romanet.vj.apps.myweather.weather.Weather;
 import retrofit2.Call;
 import retrofit2.http.GET;
+import retrofit2.http.Path;
+import retrofit2.http.Query;
 
 public interface JsonApiInterfce {
 
-//    @GET("?q=madrid&units=metric&appid=0ac5802392867db8e1ae4f91529f7890");
-
-    @GET("weather?q=paris&units=metric&appid=0ac5802392867db8e1ae4f91529f7890")
-    Call<Weather> getPost();
+    @GET("weather")
+    Call<Weather> getPost(@Query("q") String city, @Query("units") String units, @Query("appid") String appid);
 }

app/src/main/res/drawable/ic_baseline_arrow_downward_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M20,12l-1.41,-1.41L13,16.17V4h-2v12.17l-5.58,-5.59L4,12l8,8 8,-8z"/>
+</vector>

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

@@ -29,9 +29,81 @@
         android:id="@+id/textView2"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="TextView"
+        android:layout_marginTop="56dp"
+        android:text="My City"
+        android:textSize="50sp"
+        android:textStyle="bold"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.497"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/appBarLayout2" />
 
+    <ImageView
+        android:id="@+id/imageView2"
+        android:layout_width="167dp"
+        android:layout_height="100dp"
+        android:layout_marginTop="60dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textView2"
+        app:srcCompat="@drawable/ic_baseline_umbrella_24" />
+
+    <TextView
+        android:id="@+id/tv_temp"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="32dp"
+        android:text="X °C"
+        android:textSize="36sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/imageView2" />
+
+    <TextView
+        android:id="@+id/tv_feelslike"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text=" feels like x °C"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/tv_temp" />
+
+    <TextView
+        android:id="@+id/tv_tempmin"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="75dp"
+        android:layout_marginTop="40dp"
+        android:text="Min. X°C"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/tv_feelslike" />
+
+    <TextView
+        android:id="@+id/tv_tempmax"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="40dp"
+        android:layout_marginEnd="70dp"
+        android:text="Max. X°C"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/tv_feelslike" />
+
+    <ImageView
+        android:id="@+id/imageView4"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintEnd_toStartOf="@+id/tv_tempmin"
+        app:layout_constraintTop_toTopOf="@+id/tv_tempmin"
+        app:srcCompat="@drawable/ic_baseline_arrow_downward_24" />
+
+    <ImageView
+        android:id="@+id/imageView5"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:rotation="180"
+        app:layout_constraintEnd_toStartOf="@+id/tv_tempmax"
+        app:layout_constraintTop_toTopOf="@+id/tv_tempmax"
+        app:srcCompat="@drawable/ic_baseline_arrow_downward_24" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>