Settings' pseudo used in GenerateActivity

app/src/main/java/com/example/qrcode/GenerateActivity.java

@@ -3,6 +3,7 @@ package com.example.qrcode;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
+import androidx.preference.PreferenceManager;
 
 import android.Manifest;
 import android.content.Intent;
@@ -58,6 +59,11 @@ public class GenerateActivity extends AppCompatActivity {
             fromField = (AutoCompleteTextView) findViewById(R.id.fromField);
             toField   = (AutoCompleteTextView) findViewById(R.id.toField);
 
+            ;
+            String currentPseudo = PreferenceManager.getDefaultSharedPreferences(this).getString("currentPseudo", null);
+            if(currentPseudo != null)
+                fromField.setText(currentPseudo);
+
             generate.setOnClickListener(new View.OnClickListener() {
                 @Override
                 public void onClick(View view) {

app/src/main/java/com/example/qrcode/SettingsActivity.java

 package com.example.qrcode;
 
 import android.os.Bundle;
+import android.view.MenuItem;
 
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.preference.PreferenceFragmentCompat;
@@ -30,4 +32,14 @@ public class SettingsActivity extends AppCompatActivity {
             setPreferencesFromResource(R.xml.preferences, rootKey);
         }
     }
+
+    @Override
+    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                this.finish();
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
 }
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