OLD | NEW |
---|---|
1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 package org.chromium.webapk.shell_apk; | 5 package org.chromium.webapk.shell_apk; |
6 | 6 |
7 import android.app.Service; | 7 import android.app.Service; |
8 import android.content.Context; | 8 import android.content.Context; |
9 import android.content.Intent; | 9 import android.content.Intent; |
10 import android.content.SharedPreferences; | |
11 import android.content.pm.PackageInfo; | |
12 import android.content.pm.PackageManager; | |
13 import android.os.Bundle; | 10 import android.os.Bundle; |
14 import android.os.IBinder; | 11 import android.os.IBinder; |
15 import android.util.Log; | 12 import android.util.Log; |
16 | 13 |
17 import org.chromium.webapk.lib.common.WebApkUtils; | 14 import org.chromium.webapk.lib.common.WebApkUtils; |
18 | 15 |
19 import java.io.File; | |
20 import java.lang.reflect.Constructor; | 16 import java.lang.reflect.Constructor; |
21 import java.util.Scanner; | |
22 | 17 |
23 /** | 18 /** |
24 * Shell class for services provided by WebAPK to Chrome. Extracts code with imp lementation of | 19 * Shell class for services provided by WebAPK to Chrome. Extracts code with imp lementation of |
25 * services from .dex file in Chrome APK. | 20 * services from .dex file in Chrome APK. |
26 */ | 21 */ |
27 public class WebApkServiceFactory extends Service { | 22 public class WebApkServiceFactory extends Service { |
28 private static final String TAG = "cr_WebApkServiceFactory"; | 23 private static final String TAG = "cr_WebApkServiceFactory"; |
29 | 24 |
30 /** | 25 /** |
31 * Name of the class with IBinder API implementation. | 26 * Name of the class with IBinder API implementation. |
32 */ | 27 */ |
33 private static final String WEBAPK_SERVICE_IMPL_CLASS_NAME = | 28 private static final String WEBAPK_SERVICE_IMPL_CLASS_NAME = |
34 "org.chromium.webapk.lib.runtime_library.WebApkServiceImpl"; | 29 "org.chromium.webapk.lib.runtime_library.WebApkServiceImpl"; |
35 | 30 |
36 /** | 31 /** |
37 * Name of the shared preferences file. | |
38 */ | |
39 private static final String PREF_PACKAGE = "org.chromium.webapk.shell_apk"; | |
40 | |
41 /** | |
42 * Name of the shared preference for Chrome's version code. | |
43 */ | |
44 private static final String REMOTE_VERSION_CODE_PREF = | |
45 "org.chromium.webapk.shell_apk.version_code"; | |
46 | |
47 /** | |
48 * Name of the shared preference for the version number of the dynamically l oaded dex. | |
49 */ | |
50 private static final String RUNTIME_DEX_VERSION_PREF = | |
51 "org.chromium.webapk.shell_apk.dex_version"; | |
52 | |
53 /** | |
54 * Key for passing id of icon to represent WebAPK notifications in status ba r. | 32 * Key for passing id of icon to represent WebAPK notifications in status ba r. |
55 */ | 33 */ |
56 private static final String KEY_SMALL_ICON_ID = "small_icon_id"; | 34 private static final String KEY_SMALL_ICON_ID = "small_icon_id"; |
57 | 35 |
58 /** | 36 /** |
59 * Key for passing package name of only process allowed to call the service' s methods. | 37 * Key for passing package name of only process allowed to call the service' s methods. |
60 */ | 38 */ |
61 private static final String KEY_HOST_BROWSER_PACKAGE = "host_browser_package "; | 39 private static final String KEY_HOST_BROWSER_PACKAGE = "host_browser_package "; |
62 | 40 |
63 /* | |
64 * ClassLoader for loading {@link WEBAPK_SERVICE_IMPL_CLASS_NAME}. Static so that all | |
65 * {@link WebApkServiceFactory} service instatiations use the same ClassLoad er during the app's | |
66 * lifetime. | |
67 */ | |
68 private static ClassLoader sClassLoader; | |
69 | |
70 @Override | 41 @Override |
71 public IBinder onBind(Intent intent) { | 42 public IBinder onBind(Intent intent) { |
72 ClassLoader webApkClassLoader = getClassLoaderInstance(this); | 43 ClassLoader webApkClassLoader = |
44 HostBrowserClassLoader.getClassLoaderInstance(this, WEBAPK_SERVI CE_IMPL_CLASS_NAME); | |
Xi Han
2016/06/27 18:27:08
Is it good to move the call to get ClassLoader in
pkotwicz
2016/06/27 20:44:28
It is not important that interacting with the WebA
Xi Han
2016/06/28 13:53:39
I don't have strong opinion on this, it seems ok s
| |
73 if (webApkClassLoader == null) { | 45 if (webApkClassLoader == null) { |
74 Log.w(TAG, "Unable to create ClassLoader."); | 46 Log.w(TAG, "Unable to create ClassLoader."); |
75 return null; | 47 return null; |
76 } | 48 } |
77 | 49 |
78 try { | 50 try { |
79 Class<?> webApkServiceImplClass = | 51 Class<?> webApkServiceImplClass = |
80 webApkClassLoader.loadClass(WEBAPK_SERVICE_IMPL_CLASS_NAME); | 52 webApkClassLoader.loadClass(WEBAPK_SERVICE_IMPL_CLASS_NAME); |
81 Constructor<?> webApkServiceImplConstructor = | 53 Constructor<?> webApkServiceImplConstructor = |
82 webApkServiceImplClass.getConstructor(Context.class, Bundle. class); | 54 webApkServiceImplClass.getConstructor(Context.class, Bundle. class); |
83 String hostPackageName = WebApkUtils.getHostBrowserPackageName(this) ; | 55 String hostPackageName = WebApkUtils.getHostBrowserPackageName(this) ; |
84 Bundle bundle = new Bundle(); | 56 Bundle bundle = new Bundle(); |
85 bundle.putInt(KEY_SMALL_ICON_ID, R.drawable.app_icon); | 57 bundle.putInt(KEY_SMALL_ICON_ID, R.drawable.app_icon); |
86 bundle.putString(KEY_HOST_BROWSER_PACKAGE, hostPackageName); | 58 bundle.putString(KEY_HOST_BROWSER_PACKAGE, hostPackageName); |
87 return (IBinder) webApkServiceImplConstructor.newInstance(new Object [] {this, bundle}); | 59 return (IBinder) webApkServiceImplConstructor.newInstance(new Object [] {this, bundle}); |
88 } catch (Exception e) { | 60 } catch (Exception e) { |
89 Log.w(TAG, "Unable to create WebApkServiceImpl."); | 61 Log.w(TAG, "Unable to create WebApkServiceImpl."); |
90 e.printStackTrace(); | 62 e.printStackTrace(); |
91 return null; | 63 return null; |
92 } | 64 } |
93 } | 65 } |
94 | |
95 /** | |
96 * Gets / creates ClassLoader for loading {@link WEBAPK_SERVICE_IMPL_CLASS_N AME}. | |
97 * @param context WebAPK's context. | |
98 * @return The ClassLoader. | |
99 */ | |
100 private static ClassLoader getClassLoaderInstance(Context context) { | |
101 if (sClassLoader == null) { | |
102 sClassLoader = createClassLoader(context); | |
103 } | |
104 return sClassLoader; | |
105 } | |
106 | |
107 /** | |
108 * Creates ClassLoader for loading {@link WEBAPK_SERVICE_IMPL_CLASS_NAME}. | |
109 * @param context WebAPK's context. | |
110 * @return The ClassLoader. | |
111 */ | |
112 private static ClassLoader createClassLoader(Context context) { | |
113 Context remoteContext = WebApkUtils.getHostBrowserContext(context); | |
114 if (remoteContext == null) { | |
115 Log.w(TAG, "Failed to get remote context."); | |
116 return null; | |
117 } | |
118 | |
119 SharedPreferences preferences = context.getSharedPreferences(PREF_PACKAG E, MODE_PRIVATE); | |
120 | |
121 int runtimeDexVersion = preferences.getInt(RUNTIME_DEX_VERSION_PREF, -1) ; | |
122 int newRuntimeDexVersion = checkForNewRuntimeDexVersion(preferences, rem oteContext); | |
123 if (newRuntimeDexVersion == -1) { | |
124 newRuntimeDexVersion = runtimeDexVersion; | |
125 } | |
126 File localDexDir = context.getDir("dex", Context.MODE_PRIVATE); | |
127 if (newRuntimeDexVersion != runtimeDexVersion) { | |
128 Log.w(TAG, "Delete cached dex files."); | |
129 DexLoader.deleteCachedDexes(localDexDir); | |
130 } | |
131 | |
132 String dexAssetName = WebApkUtils.getRuntimeDexName(newRuntimeDexVersion ); | |
133 File remoteDexFile = | |
134 new File(remoteContext.getDir("dex", Context.MODE_PRIVATE), dexA ssetName); | |
135 return DexLoader.load(remoteContext, dexAssetName, WEBAPK_SERVICE_IMPL_C LASS_NAME, | |
136 remoteDexFile, localDexDir); | |
137 } | |
138 | |
139 /** | |
140 * Checks if there is a new "runtime dex" version number. If there is a new version number, | |
141 * updates SharedPreferences. | |
142 * @param preferences WebAPK's SharedPreferences. | |
143 * @param remoteContext | |
144 * @return The new "runtime dex" version number. -1 if there is no new versi on number. | |
145 */ | |
146 private static int checkForNewRuntimeDexVersion( | |
147 SharedPreferences preferences, Context remoteContext) { | |
148 // The "runtime dex" version only changes when {@link remoteContext}'s A PK version code | |
149 // changes. Checking the APK's version code is less expensive than readi ng from the APK's | |
150 // assets. | |
151 PackageInfo remotePackageInfo = null; | |
152 try { | |
153 remotePackageInfo = remoteContext.getPackageManager().getPackageInfo ( | |
154 remoteContext.getPackageName(), 0); | |
155 } catch (PackageManager.NameNotFoundException e) { | |
156 Log.e(TAG, "Failed to get remote package info."); | |
157 return -1; | |
158 } | |
159 | |
160 int cachedRemoteVersionCode = preferences.getInt(REMOTE_VERSION_CODE_PRE F, -1); | |
161 if (cachedRemoteVersionCode == remotePackageInfo.versionCode) { | |
162 return -1; | |
163 } | |
164 | |
165 int runtimeDexVersion = readAssetContentsToInt(remoteContext, "webapk_de x_version.txt"); | |
166 SharedPreferences.Editor editor = preferences.edit(); | |
167 editor.putInt(REMOTE_VERSION_CODE_PREF, remotePackageInfo.versionCode); | |
168 editor.putInt(RUNTIME_DEX_VERSION_PREF, runtimeDexVersion); | |
169 editor.apply(); | |
170 return runtimeDexVersion; | |
171 } | |
172 | |
173 /** | |
174 * Returns the first integer in an asset file's contents. | |
175 * @param context | |
176 * @param assetName The name of the asset. | |
177 * @return The first integer. | |
178 */ | |
179 private static int readAssetContentsToInt(Context context, String assetName) { | |
180 Scanner scanner = null; | |
181 int value = -1; | |
182 try { | |
183 scanner = new Scanner(context.getAssets().open(assetName)); | |
184 value = scanner.nextInt(); | |
185 scanner.close(); | |
186 } catch (Exception e) { | |
187 } finally { | |
188 if (scanner != null) { | |
189 try { | |
190 scanner.close(); | |
191 } catch (Exception e) { | |
192 } | |
193 } | |
194 } | |
195 return value; | |
196 } | |
197 } | 66 } |
OLD | NEW |