1 /*
2  * Copyright (C) 2019 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 com.android.documentsui;
18 
19 import static com.android.documentsui.base.Shared.LAUNCHER_TARGET_CLASS;
20 import static com.android.documentsui.base.SharedMinimal.DEBUG;
21 
22 import android.content.BroadcastReceiver;
23 import android.content.ComponentName;
24 import android.content.Context;
25 import android.content.Intent;
26 import android.content.om.OverlayInfo;
27 import android.content.om.OverlayManager;
28 import android.content.pm.PackageManager;
29 import android.content.res.Resources;
30 import android.util.Log;
31 
32 import com.android.documentsui.theme.ThemeOverlayManager;
33 import com.android.documentsui.util.VersionUtils;
34 
35 /**
36  * A receiver listening action.PRE_BOOT_COMPLETED event for setting component enable or disable.
37  * Since there's limitation of overlay AndroidManifest.xml attrs at boot stage.
38  * The workaround to retrieve config from DocumentsUI RRO package at boot time in Q.
39  */
40 public class PreBootReceiver extends BroadcastReceiver {
41 
42     private static final String TAG = "PreBootReceiver";
43     private static final String CONFIG_IS_LAUNCHER_ENABLED = "is_launcher_enabled";
44     private static final String CONFIG_HANDLE_VIEW_DOWNLOADS = "handle_view_downloads_intent";
45     private static final String DOWNLOADS_TARGET_CLASS =
46             "com.android.documentsui.ViewDownloadsActivity";
47 
48     @Override
onReceive(Context context, Intent intent)49     public void onReceive(Context context, Intent intent) {
50         final PackageManager pm = context.getPackageManager();
51         if (pm == null) {
52             Log.w(TAG, "Can't obtain PackageManager from System Service!");
53             return;
54         }
55 
56         final OverlayManager om = context.getSystemService(OverlayManager.class);
57         if (om == null) {
58             Log.w(TAG, "Can't obtain OverlayManager from System Service!");
59             return;
60         }
61 
62         final OverlayInfo info = new ThemeOverlayManager(om,
63                 context.getPackageName()).getValidOverlay(pm);
64 
65         if (info == null) {
66             Log.w(TAG, "Can't get valid overlay info");
67             return;
68         }
69 
70         final String overlayPkg = info.getPackageName();
71         final String packageName = context.getPackageName();
72 
73         Resources overlayRes;
74         try {
75             overlayRes = pm.getResourcesForApplication(overlayPkg);
76         } catch (PackageManager.NameNotFoundException e) {
77             Log.w(TAG, "Failed while parse package res.");
78             overlayRes = null;
79         }
80         if (overlayRes == null) {
81             return;
82         }
83 
84         setComponentEnabledByConfigResources(pm, packageName, LAUNCHER_TARGET_CLASS,
85                 overlayPkg, overlayRes, CONFIG_IS_LAUNCHER_ENABLED);
86         setComponentEnabledByConfigResources(pm, packageName, DOWNLOADS_TARGET_CLASS,
87                 overlayPkg, overlayRes, CONFIG_HANDLE_VIEW_DOWNLOADS);
88     }
89 
setComponentEnabledByConfigResources(PackageManager pm, String packageName, String className, String overlayPkg, Resources overlayRes, String config)90     private static void setComponentEnabledByConfigResources(PackageManager pm, String packageName,
91             String className, String overlayPkg, Resources overlayRes, String config) {
92         int resId = overlayRes.getIdentifier(config, "bool", overlayPkg);
93         if (resId != 0) {
94             final ComponentName component = new ComponentName(packageName, className);
95             boolean enabled = overlayRes.getBoolean(resId);
96             if (VersionUtils.isAtLeastS() && CONFIG_IS_LAUNCHER_ENABLED.equals(config)) {
97                 enabled = false; // Do not allow LauncherActivity to be enabled for S+.
98             }
99             if (DEBUG) {
100                 Log.i(TAG,
101                         "Overlay package:" + overlayPkg + ", customize " + config + ":" + enabled);
102             }
103             pm.setComponentEnabledSetting(component, enabled
104                             ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED
105                             : PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
106                     PackageManager.DONT_KILL_APP);
107         }
108     }
109 }
110