| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.location; |
| |
| import android.content.Context; |
| import android.location.GnssNavigationMessage; |
| import android.location.IGnssNavigationMessageListener; |
| import android.os.Handler; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| /** |
| * An base implementation for GPS navigation messages provider. |
| * It abstracts out the responsibility of handling listeners, while still allowing technology |
| * specific implementations to be built. |
| * |
| * @hide |
| */ |
| public abstract class GnssNavigationMessageProvider |
| extends RemoteListenerHelper<IGnssNavigationMessageListener> { |
| private static final String TAG = "GnssNavigationMessageProvider"; |
| private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG); |
| |
| private final GnssNavigationMessageProviderNative mNative; |
| private boolean mCollectionStarted; |
| |
| protected GnssNavigationMessageProvider(Context context, Handler handler) { |
| this(context, handler, new GnssNavigationMessageProviderNative()); |
| } |
| |
| @VisibleForTesting |
| GnssNavigationMessageProvider(Context context, Handler handler, |
| GnssNavigationMessageProviderNative aNative) { |
| super(context, handler, TAG); |
| mNative = aNative; |
| } |
| |
| void resumeIfStarted() { |
| if (DEBUG) { |
| Log.d(TAG, "resumeIfStarted"); |
| } |
| if (mCollectionStarted) { |
| mNative.startNavigationMessageCollection(); |
| } |
| } |
| |
| @Override |
| protected boolean isAvailableInPlatform() { |
| return mNative.isNavigationMessageSupported(); |
| } |
| |
| @Override |
| protected int registerWithService() { |
| boolean result = mNative.startNavigationMessageCollection(); |
| if (result) { |
| mCollectionStarted = true; |
| return RemoteListenerHelper.RESULT_SUCCESS; |
| } else { |
| return RemoteListenerHelper.RESULT_INTERNAL_ERROR; |
| } |
| } |
| |
| @Override |
| protected void unregisterFromService() { |
| boolean stopped = mNative.stopNavigationMessageCollection(); |
| if (stopped) { |
| mCollectionStarted = false; |
| } |
| } |
| |
| public void onNavigationMessageAvailable(final GnssNavigationMessage event) { |
| foreach((IGnssNavigationMessageListener listener, CallerIdentity callerIdentity) -> { |
| listener.onGnssNavigationMessageReceived(event); |
| } |
| ); |
| } |
| |
| /** Handle GNSS capabilities update from the GNSS HAL implementation */ |
| public void onCapabilitiesUpdated(int capabilities, boolean hasSubHalCapabilityFlags) { |
| // The IGnssCallback.hal@2.0 removed sub-HAL capability flags from the Capabilities enum |
| // and instead uses the sub-HAL non-null handle returned from IGnss.hal@2.0 to indicate |
| // support. Therefore, the 'hasSubHalCapabilityFlags' parameter is needed to tell if the |
| // 'capabilities' parameter includes the sub-HAL capability flags or not. Old HALs |
| // which explicitly set the sub-HAL capability bits must continue to work. |
| final boolean isGnssNavigationMessageSupported = hasSubHalCapabilityFlags |
| ? (capabilities & GnssLocationProvider.GPS_CAPABILITY_NAV_MESSAGES) != 0 |
| : mNative.isNavigationMessageSupported(); |
| setSupported(isGnssNavigationMessageSupported); |
| updateResult(); |
| } |
| |
| public void onGpsEnabledChanged() { |
| tryUpdateRegistrationWithService(); |
| updateResult(); |
| } |
| |
| @Override |
| protected ListenerOperation<IGnssNavigationMessageListener> getHandlerOperation(int result) { |
| int status; |
| switch (result) { |
| case RESULT_SUCCESS: |
| status = GnssNavigationMessage.Callback.STATUS_READY; |
| break; |
| case RESULT_NOT_AVAILABLE: |
| case RESULT_NOT_SUPPORTED: |
| case RESULT_INTERNAL_ERROR: |
| status = GnssNavigationMessage.Callback.STATUS_NOT_SUPPORTED; |
| break; |
| case RESULT_GPS_LOCATION_DISABLED: |
| status = GnssNavigationMessage.Callback.STATUS_LOCATION_DISABLED; |
| break; |
| case RESULT_UNKNOWN: |
| return null; |
| default: |
| Log.v(TAG, "Unhandled addListener result: " + result); |
| return null; |
| } |
| return new StatusChangedOperation(status); |
| } |
| |
| private static class StatusChangedOperation |
| implements ListenerOperation<IGnssNavigationMessageListener> { |
| private final int mStatus; |
| |
| public StatusChangedOperation(int status) { |
| mStatus = status; |
| } |
| |
| @Override |
| public void execute(IGnssNavigationMessageListener listener, |
| CallerIdentity callerIdentity) throws RemoteException { |
| listener.onStatusChanged(mStatus); |
| } |
| } |
| |
| @VisibleForTesting |
| static class GnssNavigationMessageProviderNative { |
| public boolean isNavigationMessageSupported() { |
| return native_is_navigation_message_supported(); |
| } |
| |
| public boolean startNavigationMessageCollection() { |
| return native_start_navigation_message_collection(); |
| } |
| |
| public boolean stopNavigationMessageCollection() { |
| return native_stop_navigation_message_collection(); |
| } |
| } |
| |
| private static native boolean native_is_navigation_message_supported(); |
| |
| private static native boolean native_start_navigation_message_collection(); |
| |
| private static native boolean native_stop_navigation_message_collection(); |
| } |