1 files changed, 43 insertions, 0 deletions
diff --git a/app/src/main/java/com/javispedro/rempe/Preferences.java b/app/src/main/java/com/javispedro/rempe/Preferences.java
new file mode 100644
index 0000000..41c943c
--- /dev/null
+++ b/app/src/main/java/com/javispedro/rempe/Preferences.java
@@ -0,0 +1,43 @@
+package com.javispedro.rempe;
+
+import android.content.SharedPreferences;
+import android.util.Log;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.StringTokenizer;
+
+import static android.content.ContentValues.TAG;
+
+class Preferences {
+    public final static String PREFS_DEVICES = "devices";
+
+    public static List<Integer> getDeviceNumbers(SharedPreferences prefs) {
+        ArrayList<Integer> result = new ArrayList<Integer>();
+
+        try {
+            StringTokenizer st = new StringTokenizer(prefs.getString(PREFS_DEVICES, ""), ",");
+            while (st.hasMoreTokens()) {
+                result.add(Integer.parseInt(st.nextToken()));
+            }
+        } catch (java.lang.Exception ex) {
+            // Ensure that at least we can recover from a corrupted preferences situation...
+            Log.e(TAG, ex.toString());
+        }
+
+        return result;
+    }
+
+    public static void saveDeviceNumbers(SharedPreferences prefs, List<Integer> list) {
+        StringBuilder sb = new StringBuilder();
+        for (Integer i : list) {
+            sb.append(i.toString());
+            sb.append(",");
+        }
+        final String pref = sb.toString();
+        Log.d(TAG, "saveDeviceNumbers: " + pref);
+        SharedPreferences.Editor editor = prefs.edit();
+        editor.putString(PREFS_DEVICES, pref);
+        editor.apply();
+    }
+}