Add MidiDevice.close() method so we can clean up our ServiceConnection

Change-Id: I65cd4cfd940b02709daeffef6dab814305b8a6b0

media/java/android/media/midi/MidiDevice.java

@@ -16,10 +16,15 @@
 
 package android.media.midi;
 
+import android.content.Context;
+import android.content.ServiceConnection;
 import android.os.ParcelFileDescriptor;
 import android.os.RemoteException;
 import android.util.Log;
 
+import java.io.Closeable;
+import java.io.IOException;
+
 /**
  * This class is used for sending and receiving data to and from an MIDI device
  * Instances of this class are created by {@link MidiManager#openDevice}.
@@ -27,19 +32,27 @@ import android.util.Log;
  * CANDIDATE FOR PUBLIC API
  * @hide
  */
-public final class MidiDevice {
+public final class MidiDevice implements Closeable {
     private static final String TAG = "MidiDevice";
 
     private final MidiDeviceInfo mDeviceInfo;
     private final IMidiDeviceServer mServer;
+    private Context mContext;
+    private ServiceConnection mServiceConnection;
 
-   /**
-     * MidiDevice should only be instantiated by MidiManager
-     * @hide
-     */
-    public MidiDevice(MidiDeviceInfo deviceInfo, IMidiDeviceServer server) {
+    /* package */ MidiDevice(MidiDeviceInfo deviceInfo, IMidiDeviceServer server) {
         mDeviceInfo = deviceInfo;
         mServer = server;
+        mContext = null;
+        mServiceConnection = null;
+    }
+
+    /* package */ MidiDevice(MidiDeviceInfo deviceInfo, IMidiDeviceServer server,
+            Context context, ServiceConnection serviceConnection) {
+        mDeviceInfo = deviceInfo;
+        mServer = server;
+        mContext = context;
+        mServiceConnection = serviceConnection;
     }
 
     /**
@@ -89,6 +102,15 @@ public final class MidiDevice {
         }
     }
 
+    @Override
+    public void close() throws IOException {
+        if (mContext != null && mServiceConnection != null) {
+            mContext.unbindService(mServiceConnection);
+            mContext = null;
+            mServiceConnection = null;
+        }
+    }
+
     @Override
     public String toString() {
         return ("MidiDevice: " + mDeviceInfo.toString());

media/java/android/media/midi/MidiManager.java

@@ -223,7 +223,7 @@ public class MidiManager {
                             public void onServiceConnected(ComponentName name, IBinder binder) {
                                 IMidiDeviceServer server =
                                         IMidiDeviceServer.Stub.asInterface(binder);
-                                MidiDevice device = new MidiDevice(deviceInfoF, server);
+                                MidiDevice device = new MidiDevice(deviceInfoF, server, mContext, this);
                                 sendOpenDeviceResponse(deviceInfoF, device, callbackF, handlerF);
                             }