Fixed back on home

app/src/main/java/com/example/myapp_1/HomeActivity.java

@@ -4,6 +4,7 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.MenuItem;
+import android.widget.ImageView;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
@@ -22,6 +23,7 @@ public class HomeActivity extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_home);
 
+        ImageView vec_back = findViewById(R.id.homeBackButton);
         BottomNavigationView bottomNavigationView = findViewById(R.id.homeBottomView);
         bottomNavigationView.setOnNavigationItemSelectedListener(
                 new BottomNavigationView.OnNavigationItemSelectedListener() {
@@ -50,6 +52,11 @@ public class HomeActivity extends AppCompatActivity {
         if (user != null)
             userGreeting.setText("Welcome " + user + "!");
 
+        vec_back.setOnClickListener(view -> {
+            Intent newScreen = new Intent(getApplicationContext(), LoginActivity.class);
+            startActivity(newScreen);
+        });
+
 
     }
 }

app/src/main/java/com/example/myapp_1/Predict.java

@@ -33,7 +33,7 @@ public class Predict extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_predict);
 
-        vec_back = findViewById(R.id.imageView2);
+        vec_back = findViewById(R.id.predictBackButton);
         edi_station = findViewById(R.id.editTextText);
         edi_weather = findViewById(R.id.editTextText2);
         btn_pred = findViewById(R.id.button4);
@@ -41,12 +41,9 @@ public class Predict extends AppCompatActivity {
         txt_station = findViewById(R.id.textView4);
         txt_pred_time = findViewById(R.id.predicted_time);
 
-        vec_back.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                Intent newScreen = new Intent(getApplicationContext(), HomeActivity.class);
-                startActivity(newScreen);
-            }
+        vec_back.setOnClickListener(view -> {
+            Intent newScreen = new Intent(getApplicationContext(), HomeActivity.class);
+            startActivity(newScreen);
         });
 
         btn_pred.setOnClickListener(new View.OnClickListener() {

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

@@ -29,19 +29,15 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
-    <androidx.appcompat.widget.Toolbar
-        android:id="@+id/homeToolbar"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:background="@color/material_dynamic_primary60"
-        android:minHeight="?attr/actionBarSize"
-        android:theme="?attr/actionBarTheme"
-        app:layout_constraintEnd_toEndOf="parent"
+    <ImageView
+        android:id="@+id/homeBackButton"
+        android:layout_width="46dp"
+        android:layout_height="48dp"
+        android:layout_marginStart="16dp"
+        android:layout_marginTop="16dp"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:navigationIcon="@drawable/baseline_arrow_back_ios"
-        app:title="Home"
-        app:titleCentered="true" />
+        app:srcCompat="@drawable/_vector" />
 
     <TextView
         android:id="@+id/userGreeting"

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

@@ -7,7 +7,7 @@
     tools:context=".Predict">
 
     <ImageView
-        android:id="@+id/imageView2"
+        android:id="@+id/predictBackButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="25dp"

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

@@ -20,7 +20,7 @@
         app:titleCentered="true" />
 
     <ImageView
-        android:id="@+id/imageView2"
+        android:id="@+id/predictBackButton"
         android:layout_width="159dp"
         android:layout_height="104dp"
         android:layout_marginTop="100dp"
@@ -50,10 +50,10 @@
         android:drawablePadding="16dp"
         android:ems="10"
         android:inputType="text"
-        app:layout_constraintEnd_toEndOf="@+id/imageView2"
+        app:layout_constraintEnd_toEndOf="@+id/predictBackButton"
         app:layout_constraintHorizontal_bias="0.483"
-        app:layout_constraintStart_toStartOf="@+id/imageView2"
-        app:layout_constraintTop_toBottomOf="@+id/imageView2" />
+        app:layout_constraintStart_toStartOf="@+id/predictBackButton"
+        app:layout_constraintTop_toBottomOf="@+id/predictBackButton" />
 
     <EditText
         android:id="@+id/editTextText3"