enabled the status icon by default on Qin F21

app/src/main/java/io/github/sspanak/tt9/preferences/screens/appearance/AppearanceScreen.java

@@ -24,5 +24,7 @@ public class AppearanceScreen extends BaseScreenFragment {
 			.populate()
 			.enableClickHandler()
 			.preview();
+
+		(new ItemStatusIcon(findPreference(ItemStatusIcon.NAME), activity.getSettings())).populate();
 	}
 }

app/src/main/java/io/github/sspanak/tt9/preferences/screens/appearance/ItemStatusIcon.java

@@ -0,0 +1,23 @@
+package io.github.sspanak.tt9.preferences.screens.appearance;
+
+import androidx.preference.SwitchPreferenceCompat;
+
+import io.github.sspanak.tt9.preferences.settings.SettingsStore;
+
+public class ItemStatusIcon {
+	public static final String NAME = "pref_status_icon";
+
+	private SwitchPreferenceCompat item;
+	private SettingsStore settings;
+
+	public ItemStatusIcon(SwitchPreferenceCompat item, SettingsStore settings) {
+		this.item = item;
+		this.settings = settings;
+	}
+
+	public void populate() {
+		if (item != null) {
+			item.setChecked(settings.isStatusIconEnabled());
+		}
+	}
+}

app/src/main/java/io/github/sspanak/tt9/preferences/settings/SettingsUI.java

@@ -5,6 +5,8 @@ import android.content.res.Configuration;
 
 import androidx.appcompat.app.AppCompatDelegate;
 
+import io.github.sspanak.tt9.util.DeviceInfo;
+
 public class SettingsUI extends SettingsTyping {
 	public final static int LAYOUT_STEALTH = 0;
 	public final static int LAYOUT_TRAY = 1;
@@ -13,7 +15,9 @@ public class SettingsUI extends SettingsTyping {
 
 	SettingsUI(Context context) { super(context); }
 
-	public boolean isStatusIconEnabled() { return prefs.getBoolean("pref_status_icon", false); }
+	public boolean isStatusIconEnabled() {
+		return prefs.getBoolean("pref_status_icon", DeviceInfo.isQinF21());
+	}
 
 	public boolean getDarkTheme() {
 		int theme = getTheme();

app/src/main/java/io/github/sspanak/tt9/util/DeviceInfo.java

@@ -0,0 +1,7 @@
+package io.github.sspanak.tt9.util;
+
+public class DeviceInfo {
+	public static boolean isQinF21() {
+		return android.os.Build.MANUFACTURER.equals("DuoQin") && android.os.Build.MODEL.contains("F21");
+	}
+}

app/src/main/res/xml/prefs_screen_appearance.xml

@@ -17,7 +17,6 @@
 
 
 	<SwitchPreferenceCompat
-		app:defaultValue="false"
 		app:key="pref_status_icon"
 		app:layout="@layout/pref_switch"
 		app:title="@string/pref_status_icon"