1 files changed, 54 insertions, 0 deletions
diff --git a/app/src/main/java/com/javispedro/autobluetether/BtDeviceEnabledSetAdapter.java b/app/src/main/java/com/javispedro/autobluetether/BtDeviceEnabledSetAdapter.java
new file mode 100644
index 0000000..7d2c8fc
--- /dev/null
+++ b/app/src/main/java/com/javispedro/autobluetether/BtDeviceEnabledSetAdapter.java
@@ -0,0 +1,54 @@
+package com.javispedro.autobluetether;
+
+import android.bluetooth.BluetoothDevice;
+import android.content.SharedPreferences;
+import android.util.ArraySet;
+import android.util.Log;
+
+import java.util.Set;
+
+public class BtDeviceEnabledSetAdapter {
+    private final static String TAG = "BtDeviceEnabledSetAd";
+
+    private final SharedPreferences mPrefs;
+    private final String mPrefsKey;
+    private final ArraySet<String> mSet = new ArraySet<>();
+
+    public BtDeviceEnabledSetAdapter(SharedPreferences prefs, String key) {
+        mPrefs = prefs;
+        mPrefsKey = key;
+
+        readPrefs();
+    }
+
+    public boolean contains(BluetoothDevice device) {
+        return mSet.contains(device.getAddress());
+    }
+
+    public void set(BluetoothDevice device, boolean enabled) {
+        String address = device.getAddress();
+        boolean currently = mSet.contains(address);
+        if (enabled && !currently) {
+            mSet.add(address);
+            savePrefs();
+        } else if (currently && !enabled) {
+            mSet.remove(address);
+            savePrefs();
+        }
+    }
+
+    private void readPrefs() {
+        mSet.clear();
+        Set<String> prefsSet = mPrefs.getStringSet(mPrefsKey, null);
+        if (prefsSet != null) {
+            mSet.addAll(prefsSet);
+        }
+    }
+
+    private void savePrefs() {
+        SharedPreferences.Editor editor = mPrefs.edit();
+        editor.putStringSet(mPrefsKey, mSet);
+        editor.apply();
+        Log.d(TAG, "saved " + mPrefsKey + ":" + mSet);
+    }
+}