| /* |
| * 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.GnssMeasurementCorrections; |
| import android.location.GnssMeasurementsEvent; |
| import android.location.IGnssMeasurementsListener; |
| import android.os.Handler; |
| import android.os.RemoteException; |
| import android.provider.Settings; |
| import android.util.Log; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| /** |
| * An base implementation for GPS measurements provider. It abstracts out the responsibility of |
| * handling listeners, while still allowing technology specific implementations to be built. |
| * |
| * @hide |
| */ |
| public abstract class GnssMeasurementsProvider |
| extends RemoteListenerHelper<IGnssMeasurementsListener> { |
| private static final String TAG = "GnssMeasurementsProvider"; |
| private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG); |
| |
| private final GnssMeasurementProviderNative mNative; |
| |
| private boolean mIsCollectionStarted; |
| private boolean mEnableFullTracking; |
| private int mGnssEngineCapabilities; |
| |
| protected GnssMeasurementsProvider(Context context, Handler handler) { |
| this(context, handler, new GnssMeasurementProviderNative()); |
| } |
| |
| @VisibleForTesting |
| GnssMeasurementsProvider( |
| Context context, Handler handler, GnssMeasurementProviderNative aNative) { |
| super(context, handler, TAG); |
| mNative = aNative; |
| } |
| |
| void resumeIfStarted() { |
| if (DEBUG) { |
| Log.d(TAG, "resumeIfStarted"); |
| } |
| if (mIsCollectionStarted) { |
| mNative.startMeasurementCollection(mEnableFullTracking); |
| } |
| } |
| |
| @Override |
| public boolean isAvailableInPlatform() { |
| return mNative.isMeasurementSupported(); |
| } |
| |
| @Override |
| protected int registerWithService() { |
| int devOptions = Settings.Secure.getInt(mContext.getContentResolver(), |
| Settings.Global.DEVELOPMENT_SETTINGS_ENABLED, 0); |
| int fullTrackingToggled = Settings.Global.getInt(mContext.getContentResolver(), |
| Settings.Global.ENABLE_GNSS_RAW_MEAS_FULL_TRACKING, 0); |
| boolean enableFullTracking = (devOptions == 1 /* Developer Mode enabled */) |
| && (fullTrackingToggled == 1 /* Raw Measurements Full Tracking enabled */); |
| boolean result = mNative.startMeasurementCollection(enableFullTracking); |
| if (result) { |
| mIsCollectionStarted = true; |
| mEnableFullTracking = enableFullTracking; |
| return RemoteListenerHelper.RESULT_SUCCESS; |
| } else { |
| return RemoteListenerHelper.RESULT_INTERNAL_ERROR; |
| } |
| } |
| |
| /** |
| * Injects GNSS measurement corrections into the GNSS chipset. |
| * |
| * @param measurementCorrections a {@link GnssMeasurementCorrections} object with the GNSS |
| * measurement corrections to be injected into the GNSS chipset. |
| */ |
| public void injectGnssMeasurementCorrections( |
| GnssMeasurementCorrections measurementCorrections) { |
| mHandler.post( |
| new Runnable() { |
| @Override |
| public void run() { |
| if (!mNative.injectGnssMeasurementCorrections(measurementCorrections)) { |
| Log.e(TAG, "Failure in injecting GNSS corrections."); |
| } |
| } |
| }); |
| } |
| |
| @Override |
| protected void unregisterFromService() { |
| boolean stopped = mNative.stopMeasurementCollection(); |
| if (stopped) { |
| mIsCollectionStarted = false; |
| } |
| } |
| |
| public void onMeasurementsAvailable(final GnssMeasurementsEvent event) { |
| foreach( |
| (IGnssMeasurementsListener listener, int uid, String packageName) -> { |
| if (!hasPermission(uid, packageName)) { |
| logPermissionDisabledEventNotReported( |
| TAG, packageName, "GNSS measurements"); |
| return; |
| } |
| listener.onGnssMeasurementsReceived(event); |
| }); |
| } |
| |
| /** Updates the framework about the capabilities of the GNSS chipset */ |
| public void onCapabilitiesUpdated(int capabilities) { |
| mGnssEngineCapabilities = capabilities; |
| boolean isGnssMeasurementsSupported = |
| (capabilities & GnssLocationProvider.GPS_CAPABILITY_MEASUREMENTS) != 0; |
| setSupported(isGnssMeasurementsSupported); |
| updateResult(); |
| } |
| |
| /** Obtains the GNSS engine capabilities. */ |
| public int getGnssCapabilities() { |
| return mGnssEngineCapabilities; |
| } |
| |
| public void onGpsEnabledChanged() { |
| tryUpdateRegistrationWithService(); |
| updateResult(); |
| } |
| |
| @Override |
| protected ListenerOperation<IGnssMeasurementsListener> getHandlerOperation(int result) { |
| int status; |
| switch (result) { |
| case RESULT_SUCCESS: |
| status = GnssMeasurementsEvent.Callback.STATUS_READY; |
| break; |
| case RESULT_NOT_AVAILABLE: |
| case RESULT_NOT_SUPPORTED: |
| case RESULT_INTERNAL_ERROR: |
| status = GnssMeasurementsEvent.Callback.STATUS_NOT_SUPPORTED; |
| break; |
| case RESULT_NOT_ALLOWED: |
| status = GnssMeasurementsEvent.Callback.STATUS_NOT_ALLOWED; |
| break; |
| case RESULT_GPS_LOCATION_DISABLED: |
| status = GnssMeasurementsEvent.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<IGnssMeasurementsListener> { |
| private final int mStatus; |
| |
| public StatusChangedOperation(int status) { |
| mStatus = status; |
| } |
| |
| @Override |
| public void execute(IGnssMeasurementsListener listener, |
| int uid, String packageName) throws RemoteException { |
| listener.onStatusChanged(mStatus); |
| } |
| } |
| |
| @VisibleForTesting |
| static class GnssMeasurementProviderNative { |
| public boolean isMeasurementSupported() { |
| return native_is_measurement_supported(); |
| } |
| |
| public boolean startMeasurementCollection(boolean enableFullTracking) { |
| return native_start_measurement_collection(enableFullTracking); |
| } |
| |
| public boolean stopMeasurementCollection() { |
| return native_stop_measurement_collection(); |
| } |
| |
| public boolean injectGnssMeasurementCorrections( |
| GnssMeasurementCorrections measurementCorrections) { |
| return native_inject_gnss_measurement_corrections(measurementCorrections); |
| } |
| } |
| |
| private static native boolean native_is_measurement_supported(); |
| |
| private static native boolean native_start_measurement_collection(boolean enableFullTracking); |
| |
| private static native boolean native_stop_measurement_collection(); |
| |
| private static native boolean native_inject_gnss_measurement_corrections( |
| GnssMeasurementCorrections measurementCorrections); |
| } |