Delegate compose back

app/src/main/java/eu/faircode/email/ActivityCompose.java

@@ -29,7 +29,9 @@ import android.os.Bundle;
 import android.text.Html;
 import android.text.Spanned;
 import android.text.TextUtils;
+import android.view.MenuItem;
 
+import androidx.annotation.NonNull;
 import androidx.core.app.TaskStackBuilder;
 import androidx.core.net.MailTo;
 import androidx.fragment.app.Fragment;
@@ -72,6 +74,15 @@ public class ActivityCompose extends ActivityBase implements FragmentManager.OnB
         handle(intent, false);
     }
 
+    @Override
+    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
+        int itemId = item.getItemId();
+        if (itemId == android.R.id.home &&
+                getSupportFragmentManager().getBackStackEntryCount() > 0)
+            return false; // Delegate to fragment
+        return super.onOptionsItemSelected(item);
+    }
+
     @Override
     public void onBackStackChanged() {
         if (getSupportFragmentManager().getBackStackEntryCount() == 0) {

app/src/main/java/eu/faircode/email/FragmentCompose.java

@@ -2002,7 +2002,10 @@ public class FragmentCompose extends FragmentBase {
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         int itemId = item.getItemId();
-        if (itemId == R.id.menu_encrypt) {
+        if (itemId == android.R.id.home) {
+            onExit();
+            return true;
+        } else if (itemId == R.id.menu_encrypt) {
             onMenuEncrypt();
             return true;
         } else if (itemId == R.id.menu_translate) {