Add option for back lock

app/src/main/java/com/kunzisoft/keepass/activities/GroupActivity.java

@@ -1214,7 +1214,19 @@ public class GroupActivity extends LockingActivity
 
     @Override
     public void onBackPressed() {
-		super.onBackPressed();
+
+    	// Normal way when we are not in root
+    	if (!rootGroup.equals(mCurrentGroup))
+			super.onBackPressed();
+    	// Else lock if needed
+    	else {
+			if (PreferencesUtil.isLockDatabaseWhenBackButtonOnRootClicked(this)) {
+				App.getDB().clear(getApplicationContext());
+				super.onBackPressed();
+			} else {
+				moveTaskToBack(true);
+			}
+		}
 
 		listNodesFragment = (ListNodesFragment) getSupportFragmentManager().findFragmentByTag(LIST_NODES_FRAGMENT_TAG);
 		// to refresh fragment

app/src/main/java/com/kunzisoft/keepass/settings/PreferencesUtil.java

@@ -22,7 +22,6 @@ package com.kunzisoft.keepass.settings;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
-import android.util.TypedValue;
 
 import com.kunzisoft.keepass.R;
 import com.kunzisoft.keepass.database.SortNodeEnum;
@@ -99,6 +98,12 @@ public class PreferencesUtil {
                 ctx.getResources().getBoolean(R.bool.lock_database_screen_off_default));
     }
 
+    public static boolean isLockDatabaseWhenBackButtonOnRootClicked(Context ctx) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ctx);
+        return prefs.getBoolean(ctx.getString(R.string.lock_database_back_root_key),
+                ctx.getResources().getBoolean(R.bool.lock_database_back_root_default));
+    }
+
     public static boolean isFingerprintEnable(Context ctx) {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ctx);
         return prefs.getBoolean(ctx.getString(R.string.fingerprint_enable_key),

app/src/main/res/values/donottranslate.xml

@@ -76,6 +76,8 @@
     <string name="app_timeout_key" translatable="false">app_timeout_key</string>
     <string name="lock_database_screen_off_key" translatable="false">lock_database_screen_off_key</string>
     <bool name="lock_database_screen_off_default" translatable="false">true</bool>
+    <string name="lock_database_back_root_key" translatable="false">lock_database_back_root_key</string>
+    <bool name="lock_database_back_root_default" translatable="false">true</bool>
     <string name="password_length_key" translatable="false">password_length_key</string>
     <string name="list_password_generator_options_key" translatable="false">list_password_generator_options_key</string>
     <string name="maskpass_key" translatable="false">maskpass</string>

app/src/main/res/values/strings.xml

@@ -230,6 +230,8 @@
     <string name="lock">Lock</string>
     <string name="lock_database_screen_off_title">Screen lock</string>
     <string name="lock_database_screen_off_summary">Lock the database when the screen is off</string>
+    <string name="lock_database_back_root_title">Back lock</string>
+    <string name="lock_database_back_root_summary">Lock the database when the user clicks the back button on the root screen</string>
     <string name="fingerprint_quick_unlock_title">How to set up fingerprint scanning for quick unlocking?</string>
     <string name="fingerprint_setting_text">Save your scanned fingerprint for your device in </string>
     <!-- Use ← for LTR languages -->

app/src/main/res/xml/application_preferences.xml

@@ -63,6 +63,11 @@
             android:title="@string/lock_database_screen_off_title"
             android:summary="@string/lock_database_screen_off_summary"
             android:defaultValue="@bool/lock_database_screen_off_default"/>
+        <SwitchPreference
+            android:key="@string/lock_database_back_root_key"
+            android:title="@string/lock_database_back_root_title"
+            android:summary="@string/lock_database_back_root_summary"
+            android:defaultValue="@bool/lock_database_back_root_default"/>
 
     </PreferenceCategory>