add backup_rules

app/src/main/AndroidManifest.xml

@@ -23,6 +23,8 @@
     <application
         android:name=".EvMapApplication"
         android:allowBackup="true"
+        android:fullBackupContent="@xml/backup_rules"
+        android:dataExtractionRules="@xml/backup_rules_api31"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"

app/src/main/res/xml/backup_rules.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<full-backup-content>
+    <include
+        domain="sharedpref"
+        path="." />
+    <exclude
+        domain="sharedpref"
+        path="encrypted_prefs.xml" />
+    <include
+        domain="database"
+        path="evmap.db" />
+</full-backup-content>

app/src/main/res/xml/backup_rules_api31.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<data-extraction-rules>
+    <cloud-backup>
+        <include
+            domain="sharedpref"
+            path="." />
+        <exclude
+            domain="sharedpref"
+            path="encrypted_prefs.xml" />
+        <include
+            domain="database"
+            path="evmap.db" />
+    </cloud-backup>
+    <device-transfer>
+        <include
+            domain="sharedpref"
+            path="." />
+        <exclude
+            domain="sharedpref"
+            path="encrypted_prefs.xml" />
+        <include
+            domain="database"
+            path="evmap.db" />
+    </device-transfer>
+</data-extraction-rules>