Change power alert content, include battery %

Instead of 'Charging true' the alert displays time, power level & state/source
Reuse method from heartbeat notifications

src/main/java/org/havenapp/main/sensors/PowerConnectionReceiver.java

@@ -5,8 +5,10 @@
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.os.BatteryManager;
+import android.os.Build;
 
 import org.havenapp.main.R;
+import org.havenapp.main.Utils;
 import org.havenapp.main.model.EventTrigger;
 import org.havenapp.main.service.MonitorService;
 
@@ -28,41 +30,47 @@ public void onReceive(Context context, Intent intent) {
 
         // explicitly check the intent action
         // avoids lint issue UnsafeProtectedBroadcastReceiver
-        int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
-        boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ||
-                status == BatteryManager.BATTERY_STATUS_FULL;
-
-        int chargePlug = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
-        boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;
-        boolean acCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;
-
         if(intent.getAction() == null) return;
         switch(intent.getAction()){
             case Intent.ACTION_POWER_CONNECTED:
-                isCharging = true;
                 break;
             case Intent.ACTION_POWER_DISCONNECTED:
-                isCharging = false;
                 break;
             default:
                 return;
         }
 
         if (MonitorService.getInstance() != null
                 && MonitorService.getInstance().isRunning()) {
-            MonitorService.getInstance().alert(EventTrigger.POWER, context.getString(R.string.status_charging) + isCharging );
+            MonitorService.getInstance().alert(EventTrigger.POWER,
+                    Utils.getBatteryPercentage(context) + "%" + " \n" +
+                            context.getString(R.string.power_source_status) + " " +
+                            getBatteryStatus(context));
         }
     }
 
     //Ref: https://developer.android.com/training/monitoring-device-state/battery-monitoring.html
 
-    private void getBatteryStatus(Context context) {
+    private String getBatteryStatus(Context context) {
         IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
         Intent batteryStatus = context.registerReceiver(null, ifilter);
-
-        // How are we charging?
+        String battStatus;
         int chargePlug = batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
         boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;
         boolean acCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;
+        boolean wirelessCharge = false;
+
+        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1)
+            wirelessCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_WIRELESS;
+
+        if (usbCharge)
+            battStatus = context.getString(R.string.power_source_status_usb);
+        else if (acCharge)
+            battStatus = context.getString(R.string.power_source_status_ac);
+        else if (wirelessCharge)
+            battStatus = context.getString(R.string.power_source_status_wireless);
+        else battStatus = context.getString(R.string.power_disconnected);
+
+        return battStatus;
     }
 }