| /* |
| * Copyright (C) 2016 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 android.car.cluster.renderer; |
| |
| import android.annotation.CallSuper; |
| import android.annotation.MainThread; |
| import android.annotation.SystemApi; |
| import android.app.Service; |
| import android.car.CarLibLog; |
| import android.car.navigation.CarNavigationInstrumentCluster; |
| import android.content.Intent; |
| import android.graphics.Bitmap; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.RemoteException; |
| import android.util.Log; |
| import android.util.Pair; |
| import android.view.KeyEvent; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.lang.ref.WeakReference; |
| |
| /** |
| * A service that used for interaction between Car Service and Instrument Cluster. Car Service may |
| * provide internal navigation binder interface to Navigation App and all notifications will be |
| * eventually land in the {@link NavigationRenderer} returned by {@link #getNavigationRenderer()}. |
| * |
| * <p>To extend this class, you must declare the service in your manifest file with |
| * the {@code android.car.permission.BIND_INSTRUMENT_CLUSTER_RENDERER_SERVICE} permission |
| * <pre> |
| * <service android:name=".MyInstrumentClusterService" |
| * android:permission="android.car.permission.BIND_INSTRUMENT_CLUSTER_RENDERER_SERVICE"> |
| * </service></pre> |
| * <p>Also, you will need to register this service in the following configuration file: |
| * {@code packages/services/Car/service/res/values/config.xml} |
| * |
| * @hide |
| */ |
| @SystemApi |
| public abstract class InstrumentClusterRenderingService extends Service { |
| |
| private static final String TAG = CarLibLog.TAG_CLUSTER; |
| |
| private RendererBinder mRendererBinder; |
| |
| @Override |
| @CallSuper |
| public IBinder onBind(Intent intent) { |
| if (Log.isLoggable(TAG, Log.DEBUG)) { |
| Log.d(TAG, "onBind, intent: " + intent); |
| } |
| |
| if (mRendererBinder == null) { |
| mRendererBinder = new RendererBinder(getNavigationRenderer()); |
| } |
| |
| return mRendererBinder; |
| } |
| |
| /** Returns {@link NavigationRenderer} or null if it's not supported. */ |
| @MainThread |
| protected abstract NavigationRenderer getNavigationRenderer(); |
| |
| /** Called when key event that was addressed to instrument cluster display has been received. */ |
| @MainThread |
| protected void onKeyEvent(KeyEvent keyEvent) { |
| } |
| |
| @Override |
| protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { |
| writer.println("**" + getClass().getSimpleName() + "**"); |
| writer.println("renderer binder: " + mRendererBinder); |
| if (mRendererBinder != null) { |
| writer.println("navigation renderer: " + mRendererBinder.mNavigationRenderer); |
| String owner = "none"; |
| if (mRendererBinder.mNavContextOwner != null) { |
| owner = "[uid: " + mRendererBinder.mNavContextOwner.first |
| + ", pid: " + mRendererBinder.mNavContextOwner.second + "]"; |
| } |
| writer.println("navigation focus owner: " + owner); |
| } |
| } |
| |
| private class RendererBinder extends IInstrumentCluster.Stub { |
| |
| private final NavigationRenderer mNavigationRenderer; |
| private final UiHandler mUiHandler; |
| |
| private volatile NavigationBinder mNavigationBinder; |
| private volatile Pair<Integer, Integer> mNavContextOwner; |
| |
| RendererBinder(NavigationRenderer navigationRenderer) { |
| mNavigationRenderer = navigationRenderer; |
| mUiHandler = new UiHandler(InstrumentClusterRenderingService.this); |
| } |
| |
| @Override |
| public IInstrumentClusterNavigation getNavigationService() throws RemoteException { |
| if (mNavigationBinder == null) { |
| mNavigationBinder = new NavigationBinder(mNavigationRenderer); |
| if (mNavContextOwner != null) { |
| mNavigationBinder.setNavigationContextOwner( |
| mNavContextOwner.first, mNavContextOwner.second); |
| } |
| } |
| return mNavigationBinder; |
| } |
| |
| @Override |
| public void setNavigationContextOwner(int uid, int pid) throws RemoteException { |
| mNavContextOwner = new Pair<>(uid, pid); |
| if (mNavigationBinder != null) { |
| mNavigationBinder.setNavigationContextOwner(uid, pid); |
| } |
| } |
| |
| @Override |
| public void onKeyEvent(KeyEvent keyEvent) throws RemoteException { |
| mUiHandler.doKeyEvent(keyEvent); |
| } |
| } |
| |
| private class NavigationBinder extends IInstrumentClusterNavigation.Stub { |
| |
| private final NavigationRenderer mNavigationRenderer; // Thread-safe navigation renderer. |
| |
| private volatile Pair<Integer, Integer> mNavContextOwner; |
| |
| NavigationBinder(NavigationRenderer navigationRenderer) { |
| mNavigationRenderer = ThreadSafeNavigationRenderer.createFor( |
| Looper.getMainLooper(), |
| navigationRenderer); |
| } |
| |
| void setNavigationContextOwner(int uid, int pid) { |
| mNavContextOwner = new Pair<>(uid, pid); |
| } |
| |
| @Override |
| public void onStartNavigation() throws RemoteException { |
| assertContextOwnership(); |
| mNavigationRenderer.onStartNavigation(); |
| } |
| |
| @Override |
| public void onStopNavigation() throws RemoteException { |
| assertContextOwnership(); |
| mNavigationRenderer.onStopNavigation(); |
| } |
| |
| @Override |
| public void onNextManeuverChanged(int event, CharSequence eventName, int turnAngle, |
| int turnNumber, Bitmap image, int turnSide) throws RemoteException { |
| assertContextOwnership(); |
| mNavigationRenderer.onNextTurnChanged(event, eventName, turnAngle, turnNumber, |
| image, turnSide); |
| } |
| |
| @Override |
| public void onNextManeuverDistanceChanged(int distanceMeters, int timeSeconds, |
| int displayDistanceMillis, int displayDistanceUnit) throws RemoteException { |
| assertContextOwnership(); |
| mNavigationRenderer.onNextTurnDistanceChanged(distanceMeters, timeSeconds, |
| displayDistanceMillis, displayDistanceUnit); |
| } |
| |
| @Override |
| public CarNavigationInstrumentCluster getInstrumentClusterInfo() throws RemoteException { |
| return mNavigationRenderer.getNavigationProperties(); |
| } |
| |
| private void assertContextOwnership() { |
| int uid = getCallingUid(); |
| int pid = getCallingPid(); |
| |
| Pair<Integer, Integer> owner = mNavContextOwner; |
| if (owner == null || owner.first != uid || owner.second != pid) { |
| throw new IllegalStateException("Client (uid:" + uid + ", pid: " + pid + ") is" |
| + "not an owner of APP_CONTEXT_NAVIGATION"); |
| } |
| } |
| } |
| |
| private static class UiHandler extends Handler { |
| private static int KEY_EVENT = 0; |
| private final WeakReference<InstrumentClusterRenderingService> mRefService; |
| |
| UiHandler(InstrumentClusterRenderingService service) { |
| mRefService = new WeakReference<>(service); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| InstrumentClusterRenderingService service = mRefService.get(); |
| if (service == null) { |
| return; |
| } |
| |
| if (msg.what == KEY_EVENT) { |
| service.onKeyEvent((KeyEvent) msg.obj); |
| } else { |
| throw new IllegalArgumentException("Unexpected message: " + msg); |
| } |
| } |
| |
| void doKeyEvent(KeyEvent event) { |
| sendMessage(obtainMessage(KEY_EVENT, event)); |
| } |
| } |
| } |