- Fix proguard issue with ANT+ services.

- Fix AntSensorManager.onDestroy, check antReceiver is not null.
- In AntSensorManager.onDestroy, log info rather than log error
  for AntServiceNotConnectedException.

MyTracks/proguard.cfg

@@ -67,3 +67,9 @@
 # Needed by Guava
 
 -dontwarn sun.misc.Unsafe
+
+# Keep services needed by ANT+ protocol
+-keep public class com.dsi.ant.IAnt_6
+-keep public class com.dsi.ant.IAnt
+-keep public class com.dsi.ant.IServiceSettings
+

MyTracks/src/com/google/android/apps/mytracks/services/sensors/ant/AntSensorManager.java

@@ -22,6 +22,7 @@ import com.dsi.ant.AntInterface;
 import com.dsi.ant.AntInterfaceIntent;
 import com.dsi.ant.AntMesg;
 import com.dsi.ant.exception.AntInterfaceException;
+import com.dsi.ant.exception.AntServiceNotConnectedException;
 import com.google.android.apps.mytracks.content.Sensor;
 import com.google.android.apps.mytracks.content.Sensor.SensorDataSet;
 import com.google.android.apps.mytracks.services.sensors.SensorManager;
@@ -142,14 +143,17 @@ public abstract class AntSensorManager extends SensorManager {
       Log.w(TAG, "Failed to unregister ANT data receiver", e);
     }
 
+    if (antReceiver != null) {
       try {
         antReceiver.releaseInterface();
+      } catch (AntServiceNotConnectedException e) {
+        Log.i(TAG, "ANT service not connected", e);
       } catch (AntInterfaceException e) {
         Log.e(TAG, "failed to release ANT interface", e);
       }
-
       antReceiver.destroy();
     }
+  }
 
   @Override
   public SensorDataSet getSensorDataSet() {
@@ -236,7 +240,7 @@ public abstract class AntSensorManager extends SensorManager {
   /**
    * Process a raw ANT message.
    * @param antMessage the ANT message, including the size and message ID bytes
-   * @deprecated Use {@link #handleMessage(int, byte[])} instead.
+   * @deprecated Use {@link #handleMessage(byte, byte[])} instead.
    */
   protected void handleMessage(byte[] antMessage) {
     int len = antMessage[0];