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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package android.car.content.pm;
     17 
     18 import android.annotation.SystemApi;
     19 import android.app.Service;
     20 import android.content.Intent;
     21 import android.os.Handler;
     22 import android.os.IBinder;
     23 import android.os.Looper;
     24 import android.os.RemoteException;
     25 import android.util.Log;
     26 
     27 /**
     28  * Service to be implemented by Service which wants to control app blocking policy.
     29  * App should require android.car.permission.CONTROL_APP_BLOCKING to launch Service
     30  * implementation. Additionally the APK should have the permission to be launched by Car Service.
     31  * The implementing service should declare {@link #SERVICE_INTERFACE} in its intent filter as
     32  * action.
     33  * @hide
     34  */
     35 @SystemApi
     36 public abstract class CarAppBlockingPolicyService extends Service {
     37 
     38     private static final String TAG = CarAppBlockingPolicyService.class.getSimpleName();
     39 
     40     public static final String SERVICE_INTERFACE =
     41             "android.car.content.pm.CarAppBlockingPolicyService";
     42 
     43     private final ICarAppBlockingPoicyImpl mBinder = new ICarAppBlockingPoicyImpl();
     44     private Handler mHandler;
     45 
     46     /**
     47      * Return the app blocking policy. This is called from binder thread.
     48      * @return
     49      */
     50     protected abstract CarAppBlockingPolicy getAppBlockingPolicy();
     51 
     52     @Override
     53     public int onStartCommand(Intent intent, int flags, int startId) {
     54         return START_STICKY;
     55     }
     56 
     57     @Override
     58     public IBinder onBind(Intent intent) {
     59         Log.i(TAG, "onBind");
     60         return mBinder;
     61     }
     62 
     63     @Override
     64     public boolean onUnbind(Intent intent) {
     65         Log.i(TAG, "onUnbind");
     66         stopSelf();
     67         return false;
     68     }
     69 
     70 
     71     private class ICarAppBlockingPoicyImpl extends ICarAppBlockingPolicy.Stub {
     72 
     73         @Override
     74         public void setAppBlockingPolicySetter(ICarAppBlockingPolicySetter setter) {
     75             Log.i(TAG, "setAppBlockingPolicySetter will set policy");
     76             CarAppBlockingPolicy policy = CarAppBlockingPolicyService.this.getAppBlockingPolicy();
     77             try {
     78                 setter.setAppBlockingPolicy(policy);
     79             } catch (RemoteException e) {
     80                 // if car service crashed, it will retry later.
     81             }
     82         }
     83     }
     84 }
     85