Home | History | Annotate | Download | only in stubs 
      1 /*
      2  * Copyright (C) 2018 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 
     17 package android.app.stubs;
     18 
     19 import android.content.BroadcastReceiver;
     20 import android.content.ComponentName;
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.ServiceConnection;
     24 import android.content.pm.ServiceInfo;
     25 import android.os.Binder;
     26 import android.os.Bundle;
     27 import android.os.IBinder;
     28 import android.util.ArrayMap;
     29 import android.util.Log;
     30 
     31 public class CommandReceiver extends BroadcastReceiver {
     32 
     33     private static final String TAG = "CommandReceiver";
     34 
     35     // Requires flags and targetPackage
     36     public static final int COMMAND_BIND_SERVICE = 1;
     37     // Requires targetPackage
     38     public static final int COMMAND_UNBIND_SERVICE = 2;
     39     public static final int COMMAND_START_FOREGROUND_SERVICE = 3;
     40     public static final int COMMAND_STOP_FOREGROUND_SERVICE = 4;
     41     public static final int COMMAND_START_FOREGROUND_SERVICE_LOCATION = 5;
     42     public static final int COMMAND_STOP_FOREGROUND_SERVICE_LOCATION = 6;
     43 
     44     public static final String EXTRA_COMMAND = "android.app.stubs.extra.COMMAND";
     45     public static final String EXTRA_TARGET_PACKAGE = "android.app.stubs.extra.TARGET_PACKAGE";
     46     public static final String EXTRA_FLAGS = "android.app.stubs.extra.FLAGS";
     47 
     48     public static final String SERVICE_NAME = "android.app.stubs.LocalService";
     49 
     50     private static ArrayMap<String,ServiceConnection> sServiceMap = new ArrayMap<>();
     51 
     52     /**
     53      * Handle the different types of binding/unbinding requests.
     54      * @param context The Context in which the receiver is running.
     55      * @param intent The Intent being received.
     56      */
     57     @Override
     58     public void onReceive(Context context, Intent intent) {
     59         int command = intent.getIntExtra(EXTRA_COMMAND, -1);
     60         Log.d(TAG + "_" + context.getPackageName(), "Got command " + command + ", intent="
     61                 + intent);
     62         switch (command) {
     63             case COMMAND_BIND_SERVICE:
     64                 doBindService(context, intent);
     65                 break;
     66             case COMMAND_UNBIND_SERVICE:
     67                 doUnbindService(context, intent);
     68                 break;
     69             case COMMAND_START_FOREGROUND_SERVICE:
     70                 doStartForegroundService(context, LocalForegroundService.class);
     71                 break;
     72             case COMMAND_STOP_FOREGROUND_SERVICE:
     73                 doStopForegroundService(context, LocalForegroundService.class);
     74                 break;
     75             case COMMAND_START_FOREGROUND_SERVICE_LOCATION:
     76                 int type = intent.getIntExtra(
     77                         LocalForegroundServiceLocation.EXTRA_FOREGROUND_SERVICE_TYPE,
     78                         ServiceInfo.FOREGROUND_SERVICE_TYPE_MANIFEST);
     79                 doStartForegroundServiceWithType(context, LocalForegroundServiceLocation.class,
     80                         type);
     81                 break;
     82             case COMMAND_STOP_FOREGROUND_SERVICE_LOCATION:
     83                 doStopForegroundService(context, LocalForegroundServiceLocation.class);
     84                 break;
     85         }
     86     }
     87 
     88     private void doBindService(Context context, Intent commandIntent) {
     89         context = context.getApplicationContext();
     90         if (LocalService.sServiceContext != null) {
     91             context = LocalService.sServiceContext;
     92         }
     93 
     94         String targetPackage = getTargetPackage(commandIntent);
     95         int flags = getFlags(commandIntent);
     96 
     97         Intent bindIntent = new Intent();
     98         bindIntent.setComponent(new ComponentName(targetPackage, SERVICE_NAME));
     99 
    100         ServiceConnection connection = addServiceConnection(targetPackage);
    101 
    102         context.bindService(bindIntent, connection, flags | Context.BIND_AUTO_CREATE);
    103     }
    104 
    105     private void doUnbindService(Context context, Intent commandIntent) {
    106         String targetPackage = getTargetPackage(commandIntent);
    107         context.unbindService(sServiceMap.remove(targetPackage));
    108     }
    109 
    110     private void doStartForegroundService(Context context, Class cls) {
    111         Intent fgsIntent = new Intent(context, cls);
    112         int command = LocalForegroundService.COMMAND_START_FOREGROUND;
    113         fgsIntent.putExtras(LocalForegroundService.newCommand(new Binder(), command));
    114         context.startForegroundService(fgsIntent);
    115     }
    116 
    117     private void doStartForegroundServiceWithType(Context context, Class cls, int type) {
    118         Intent fgsIntent = new Intent(context, cls);
    119         int command = LocalForegroundServiceLocation.COMMAND_START_FOREGROUND_WITH_TYPE;
    120         fgsIntent.putExtras(LocalForegroundService.newCommand(new Binder(), command));
    121         fgsIntent.putExtra(LocalForegroundServiceLocation.EXTRA_FOREGROUND_SERVICE_TYPE, type);
    122         context.startForegroundService(fgsIntent);
    123     }
    124 
    125     private void doStopForegroundService(Context context, Class cls) {
    126         Intent fgsIntent = new Intent(context, cls);
    127         context.stopService(fgsIntent);
    128     }
    129 
    130     private String getTargetPackage(Intent intent) {
    131         return intent.getStringExtra(EXTRA_TARGET_PACKAGE);
    132     }
    133 
    134     private int getFlags(Intent intent) {
    135         return intent.getIntExtra(EXTRA_FLAGS, 0);
    136     }
    137 
    138     public static void sendCommand(Context context, int command, String sourcePackage,
    139             String targetPackage, int flags, Bundle extras) {
    140         Intent intent = new Intent();
    141         if (command == COMMAND_BIND_SERVICE || command == COMMAND_START_FOREGROUND_SERVICE) {
    142             intent.setFlags(Intent.FLAG_RECEIVER_FOREGROUND);
    143         }
    144         intent.setComponent(new ComponentName(sourcePackage, "android.app.stubs.CommandReceiver"));
    145         intent.putExtra(EXTRA_COMMAND, command);
    146         intent.putExtra(EXTRA_FLAGS, flags);
    147         intent.putExtra(EXTRA_TARGET_PACKAGE, targetPackage);
    148         if (extras != null) {
    149             intent.putExtras(extras);
    150         }
    151         sendCommand(context, intent);
    152     }
    153 
    154     private static void sendCommand(Context context, Intent intent) {
    155         Log.d(TAG, "Sending broadcast " + intent);
    156         context.sendOrderedBroadcast(intent, null);
    157     }
    158 
    159     private ServiceConnection addServiceConnection(final String packageName) {
    160         ServiceConnection connection = new ServiceConnection() {
    161             @Override
    162             public void onServiceConnected(ComponentName name, IBinder service) {
    163             }
    164 
    165             @Override
    166             public void onServiceDisconnected(ComponentName name) {
    167             }
    168         };
    169         sServiceMap.put(packageName, connection);
    170         return connection;
    171     }
    172 }
    173