am e39def48: MidiService: update listener with current status when registered (0a64b146) · Commits · e / os / android_frameworks_base

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

+7 −0

Original line number	Original line	Diff line number	Diff line
	@@ -169,6 +169,13 @@ public final class MidiManager {
	/**		/**
	* Registers a callback to receive notifications when MIDI devices are added and removed.		* Registers a callback to receive notifications when MIDI devices are added and removed.
	*		*
			* The {@link DeviceCallback#onDeviceStatusChanged} method will be called immediately
			* for any devices that have open ports. This allows applications to know which input
			* ports are already in use and, therefore, unavailable.
			*
			* Applications should call {@link #getDevices} before registering the callback
			* to get a list of devices already added.
			*
	* @param callback a {@link DeviceCallback} for MIDI device notifications		* @param callback a {@link DeviceCallback} for MIDI device notifications
	* @param handler The {@link android.os.Handler Handler} that will be used for delivering the		* @param handler The {@link android.os.Handler Handler} that will be used for delivering the
	* device notifications. If handler is null, then the thread used for the		* device notifications. If handler is null, then the thread used for the

+21 −0

Original line number	Original line	Diff line number	Diff line
	@@ -575,6 +575,8 @@ public class MidiService extends IMidiManager.Stub {
	Client client = getClient(token);		Client client = getClient(token);
	if (client == null) return;		if (client == null) return;
	client.addListener(listener);		client.addListener(listener);
			// Let listener know whether any ports are already busy.
			updateStickyDeviceStatus(client.mUid, listener);
	}		}

	@Override		@Override
	@@ -584,6 +586,25 @@ public class MidiService extends IMidiManager.Stub {
	client.removeListener(listener);		client.removeListener(listener);
	}		}

			// Inform listener of the status of all known devices.
			private void updateStickyDeviceStatus(int uid, IMidiDeviceListener listener) {
			synchronized (mDevicesByInfo) {
			for (Device device : mDevicesByInfo.values()) {
			// ignore private devices that our client cannot access
			if (device.isUidAllowed(uid)) {
			try {
			MidiDeviceStatus status = device.getDeviceStatus();
			if (status != null) {
			listener.onDeviceStatusChanged(status);
			}
			} catch (RemoteException e) {
			Log.e(TAG, "remote exception", e);
			}
			}
			}
			}
			}

	private static final MidiDeviceInfo[] EMPTY_DEVICE_INFO_ARRAY = new MidiDeviceInfo[0];		private static final MidiDeviceInfo[] EMPTY_DEVICE_INFO_ARRAY = new MidiDeviceInfo[0];

	public MidiDeviceInfo[] getDevices() {		public MidiDeviceInfo[] getDevices() {