Added event handler for bluetooth adapter state change.

able/android/jni.py

@@ -34,7 +34,6 @@ def on_scan_result(self, result):
                 device
             )
 
-
     @java_method('(Z)V')
     def on_scan_started(self, success):
         Logger.debug("on_scan_started")
@@ -51,6 +50,11 @@ def on_connection_state_change(self, status, state):
             status, state))
         self.dispatcher.dispatch('on_connection_state_change', status, state)
 
+    @java_method('(I)V')
+    def on_bluetooth_adapter_state_change(self, state):
+        Logger.debug("on_bluetooth_adapter_state_change state: {}".format(state))
+        self.dispatcher.dispatch('on_bluetooth_adapter_state_change', state)
+
     @java_method('(ILjava/util/List;)V')
     def on_services(self, status, services):
         services_dict = Services()

able/dispatcher.py

@@ -29,6 +29,7 @@ class BluetoothDispatcherBase(EventDispatcher):
         "on_scan_completed",
         "on_services",
         "on_connection_state_change",
+        "on_bluetooth_adapter_state_change",
         "on_characteristic_changed",
         "on_characteristic_read",
         "on_characteristic_write",
@@ -279,6 +280,13 @@ def on_connection_state_change(self, status, state):
         """
         pass
 
+    def on_bluetooth_adapter_state_change(self, state):
+        """`bluetooth_adapter_state_change` event handler
+            Allows the user to detect when bluetooth adapter is turned on/off.
+
+        :param state: STATE_OFF, STATE_TURNING_OFF, STATE_ON, STATE_TURNING_ON
+        """
+
     def on_services(self, services, status):
         """`services` event handler
 

able/src/org/able/BLE.java

@@ -2,6 +2,8 @@
 
 import android.app.Activity;
 import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.bluetooth.BluetoothAdapter;
@@ -66,6 +68,7 @@ public BLE(PythonBluetooth python) {
                 final BluetoothManager bluetoothManager =
                         (BluetoothManager) mContext.getSystemService(Context.BLUETOOTH_SERVICE);
                 mBluetoothAdapter = bluetoothManager.getAdapter();
+                mContext.registerReceiver(mReceiver, new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED));
         }
 
         public BluetoothAdapter getAdapter(int EnableBtCode) {
@@ -171,6 +174,18 @@ public void closeGatt() {
                 }
         }
 
+        private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
+                @Override
+                public void onReceive(Context context, Intent intent) {
+                String action = intent.getAction();
+                if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
+                        Log.d(TAG, "onReceive - BluetoothAdapter state changed");
+                        int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, -1);
+                        mPython.on_bluetooth_adapter_state_change(state);
+                }
+                }
+        };
+
         private final BluetoothGattCallback mGattCallback =
                 new BluetoothGattCallback() {
                         @Override

able/src/org/able/PythonBluetooth.java

@@ -19,6 +19,7 @@ interface PythonBluetooth
         public void on_descriptor_read(BluetoothGattDescriptor descriptor, int status);
         public void on_descriptor_write(BluetoothGattDescriptor descriptor, int status);
         public void on_connection_state_change(int status, int state);
+        public void on_bluetooth_adapter_state_change(int state);
 	public void on_rssi_updated(int rssi, int status);
         public void on_mtu_changed (int mtu, int status);
 }