altosdroid: simplify keys() method

Signed-off-by: Mike Beattie <mike@ethernal.org>

diff --git a/altosdroid/src/org/altusmetrum/AltosDroid/AltosDroidPreferences.java b/altosdroid/src/org/altusmetrum/AltosDroid/AltosDroidPreferences.java
index 7ba328f4e2d8bbf00d61d442750956084d8d2d42..28ecc182435be6ad261866e26b1ef476cc478bf6 100644 (file)
--- a/altosdroid/src/org/altusmetrum/AltosDroid/AltosDroidPreferences.java
+++ b/altosdroid/src/org/altusmetrum/AltosDroid/AltosDroidPreferences.java
@@ -47,10 +47,8 @@ public class AltosDroidPreferences implements AltosPreferencesBackend {
        }
 
        public String[] keys() {
-               Map<String, ?> data = prefs.getAll();
-               String[] keys = new String[data.size()];
-               data.keySet().toArray(keys);
-               return keys;
+               Map<String, ?> all = prefs.getAll();
+               return (String[])all.keySet().toArray();
        }
 
        public boolean nodeExists(String key) {