diff --git a/android/.idea/compiler.xml b/android/.idea/compiler.xml
index 8fabff5a..8b3f1027 100644
--- a/android/.idea/compiler.xml
+++ b/android/.idea/compiler.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="17" />
+    <bytecodeTargetLevel target="21" />
   </component>
 </project>
\ No newline at end of file
diff --git a/android/.idea/deploymentTargetSelector.xml b/android/.idea/deploymentTargetSelector.xml
new file mode 100644
index 00000000..95551b5a
--- /dev/null
+++ b/android/.idea/deploymentTargetSelector.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="deploymentTargetSelector">
+    <selectionStates>
+      <SelectionState runConfigName="Unnamed">
+        <option name="selectionMode" value="DROPDOWN" />
+      </SelectionState>
+      <SelectionState runConfigName="app">
+        <option name="selectionMode" value="DROPDOWN" />
+        <DropdownSelection timestamp="2025-02-10T13:14:15.256982400Z">
+          <Target type="DEFAULT_BOOT">
+            <handle>
+              <DeviceId pluginId="PhysicalDevice" identifier="serial=37171FDJG005XB" />
+            </handle>
+          </Target>
+        </DropdownSelection>
+        <DialogSelection />
+      </SelectionState>
+    </selectionStates>
+  </component>
+</project>
\ No newline at end of file
diff --git a/android/.idea/migrations.xml b/android/.idea/migrations.xml
new file mode 100644
index 00000000..48052b24
--- /dev/null
+++ b/android/.idea/migrations.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectMigrations">
+    <option name="MigrateToGradleLocalJavaHome">
+      <set>
+        <option value="$PROJECT_DIR$" />
+      </set>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/android/.idea/misc.xml b/android/.idea/misc.xml
index 8978d23d..74dd639e 100644
--- a/android/.idea/misc.xml
+++ b/android/.idea/misc.xml
@@ -1,6 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="jbr-17" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="jbr-21" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/android/.idea/runConfigurations.xml b/android/.idea/runConfigurations.xml
new file mode 100644
index 00000000..5bd6771a
--- /dev/null
+++ b/android/.idea/runConfigurations.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="com.intellij.execution.junit.AbstractAllInDirectoryConfigurationProducer" />
+        <option value="com.intellij.execution.junit.AllInPackageConfigurationProducer" />
+        <option value="com.intellij.execution.junit.PatternConfigurationProducer" />
+        <option value="com.intellij.execution.junit.TestInClassConfigurationProducer" />
+        <option value="com.intellij.execution.junit.UniqueIdConfigurationProducer" />
+        <option value="com.intellij.execution.junit.testDiscovery.JUnitTestDiscoveryConfigurationProducer" />
+        <option value="org.jetbrains.kotlin.idea.junit.KotlinJUnitRunConfigurationProducer" />
+        <option value="org.jetbrains.kotlin.idea.junit.KotlinPatternConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/android/build.gradle b/android/build.gradle
index 9b95a5e9..1b105d32 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -7,7 +7,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:8.2.1'
+        classpath 'com.android.tools.build:gradle:8.8.0'
         // classpath 'com.google.gms:google-services:4.4.0'
 
         // NOTE: Do not place your application dependencies here; they belong
diff --git a/android/gradle/wrapper/gradle-wrapper.properties b/android/gradle/wrapper/gradle-wrapper.properties
index 829e1a5a..36074adc 100644
--- a/android/gradle/wrapper/gradle-wrapper.properties
+++ b/android/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-all.zip
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/src/js/globals.js b/src/js/globals.js
index bc7a84b9..f3d2a922 100644
--- a/src/js/globals.js
+++ b/src/js/globals.js
@@ -3,6 +3,7 @@
  *
  * This program and the accompanying materials are made available under the terms of the GPL License, Version 3.0.
  */
+import { Network } from "@capacitor/network";
 
 /** global: map */
 let map = null;
@@ -98,7 +99,7 @@ let landmark = null;
 let compareLandmark = null;
 
 // Global flag: is the device connected to the internet?
-let online = true;
+let online = (await Network.getStatus()).connected;
 
 // Scroll
 let maxScroll = (document.scrollingElement.scrollHeight - document.scrollingElement.clientHeight);
diff --git a/src/js/layer-manager/layer-switcher.js b/src/js/layer-manager/layer-switcher.js
index b5e577c3..108b6fd4 100644
--- a/src/js/layer-manager/layer-switcher.js
+++ b/src/js/layer-manager/layer-switcher.js
@@ -288,7 +288,10 @@ class LayerSwitcher extends EventTarget {
     if (typeof id !== "undefined") {
       if (this.layers[id].type === "vector") {
         var pos = this.layers[id].position;
-        var beforeId = this.map.getStyle().layers[this.#getIndexLayer(pos)].id;
+        var beforeId = 0;
+        if (this.map.getStyle().layers.length) {
+          beforeId = this.map.getStyle().layers[this.#getIndexLayer(pos)].id;
+        }
         var max = (pos === Object.keys(this.layers).length - 1);
         if (!max) {
           // ne jamais déplacer le groupe avant le background tout blanc
diff --git a/src/js/poi.js b/src/js/poi.js
index d08d9729..e260e6a4 100644
--- a/src/js/poi.js
+++ b/src/js/poi.js
@@ -68,6 +68,9 @@ class POI {
   async load() {
     var props = LayersConfig.getLayerProps(this.id);
     var style = props.style; // url !
+    if (!Globals.online) {
+      style = props.fallbackStyle; // url !;
+    }
 
     return fetch(style)
       .then((response) => {