1 // 如果是新增的资源，直接将资源文件拷贝到目标目录. 2 if (oldFile == null || !oldFile.exists()) { 3     if (Utils.checkFileInPattern(config.mResIgnoreChangePattern, name)) { 4         Logger.e("found add resource: " + name + " ,but it match ignore change pattern, just ignore!"); 5         return false; 6     } 7     FileOperation.copyFileUsingStream(newFile, outputFile); 8     addedSet.add(name); 9     writeResLog(newFile, oldFile, TypedValue.ADD);10     return true;11 }12 ...13 // 新旧资源文件的md5一样，表示没有修改.14 if (oldMd5 != null && oldMd5.equals(newMd5)) {15     return false;16 }17 ...18 // 修改的资源文件使用dealWithModeFile函数处理.19 dealWithModeFile(name, newMd5, oldFile, newFile, outputFile);

 1 if (checkLargeModFile(newFile)) { //大文件采用bsdiff算法 2     if (!outputFile.getParentFile().exists()) { 3         outputFile.getParentFile().mkdirs(); 4     } 5     BSDiff.bsdiff(oldFile, newFile, outputFile); 6     //treat it as normal modify 7     // 对生成的diff文件大小和newFile进行比较，只有在达到我们的压缩效果后才使用diff文件 8     if (Utils.checkBsDiffFileSize(outputFile, newFile)) { 9         LargeModeInfo largeModeInfo = new LargeModeInfo();10         largeModeInfo.path = newFile;11         largeModeInfo.crc = FileOperation.getFileCrc32(newFile);12         largeModeInfo.md5 = newMd5;13         largeModifiedSet.add(name);14         largeModifiedMap.put(name, largeModeInfo);15         writeResLog(newFile, oldFile, TypedValue.LARGE_MOD);16         return true;17     }18 }19 modifiedSet.add(name); // 加入修改列表20 FileOperation.copyFileUsingStream(newFile, outputFile);21 writeResLog(newFile, oldFile, TypedValue.MOD);22 return false;

 1 //加入一个测试用的资源文件 2 addAssetsFileForTestResource(); 3 ... 4 //first, write resource meta first 5 //use resources.arsc‘s base crc to identify base.apk 6 String arscBaseCrc = FileOperation.getZipEntryCrc(config.mOldApkFile, TypedValue.RES_ARSC); 7 String arscMd5 = FileOperation.getZipEntryMd5(extractToZip, TypedValue.RES_ARSC); 8 if (arscBaseCrc == null || arscMd5 == null) { 9     throw new TinkerPatchException("can‘t find resources.arsc‘s base crc or md5");10 }11 12 String resourceMeta = Utils.getResourceMeta(arscBaseCrc, arscMd5);13 writeMetaFile(resourceMeta);14 15 //pattern16 String patternMeta = TypedValue.PATTERN_TITLE;17 HashSet<String> patterns = new HashSet<>(config.mResRawPattern);18 //we will process them separate19 patterns.remove(TypedValue.RES_MANIFEST);20 21 writeMetaFile(patternMeta + patterns.size());22 //write pattern23 for (String item : patterns) {24     writeMetaFile(item);25 }26 //write meta file, write large modify first27 writeMetaFile(largeModifiedSet, TypedValue.LARGE_MOD);28 writeMetaFile(modifiedSet, TypedValue.MOD);29 writeMetaFile(addedSet, TypedValue.ADD);30 writeMetaFile(deletedSet, TypedValue.DEL);

resources_out.zip,4019114434,6148149bd5ed4e0c2f5357c6e2c577d6pattern:4resources.arscr/*res/*assets/*modify:1r/g/ag.xmladd:1assets/only_use_to_test_tinker_resource.txt

 1 / 首先读取res_meta.txt的数据 2 ShareResPatchInfo.parseAllResPatchInfo(meta, resPatchInfo); 3 // 验证resPatchInfo的MD5是否合法 4 if (!SharePatchFileUtil.checkIfMd5Valid(resPatchInfo.resArscMd5)) { 5 ... 6 // resources.apk 7 File resOutput = new File(directory, ShareConstants.RES_NAME); 8  9 // 该函数里面会对largeMod的文件进行合成，合成的算法也是采用bsdiff10 if (!checkAndExtractResourceLargeFile(context, apkPath, directory, patchFile, resPatchInfo, type, isUpgradePatch)) {11 12 // 基于oldapk，合并补丁后将这些资源文件写入resources.apk文件中13 while (entries.hasMoreElements()) {14     TinkerZipEntry zipEntry = entries.nextElement();15     if (zipEntry == null) {16         throw new TinkerRuntimeException("zipEntry is null when get from oldApk");17     }18     String name = zipEntry.getName();19     if (ShareResPatchInfo.checkFileInPattern(resPatchInfo.patterns, name)) {20         //won‘t contain in add set.21         if (!resPatchInfo.deleteRes.contains(name)22             && !resPatchInfo.modRes.contains(name)23             && !resPatchInfo.largeModRes.contains(name)24             && !name.equals(ShareConstants.RES_MANIFEST)) {25             ResUtil.extractTinkerEntry(oldApk, zipEntry, out);26             totalEntryCount++;27         }28     }29 }30 31 //process manifest32 TinkerZipEntry manifestZipEntry = oldApk.getEntry(ShareConstants.RES_MANIFEST);33 if (manifestZipEntry == null) {34     TinkerLog.w(TAG, "manifest patch entry is null. path:" + ShareConstants.RES_MANIFEST);35     manager.getPatchReporter().onPatchTypeExtractFail(patchFile, resOutput, ShareConstants.RES_MANIFEST, type, isUpgradePatch);36     return false;37 }38 ResUtil.extractTinkerEntry(oldApk, manifestZipEntry, out);39 totalEntryCount++;40 41 for (String name : resPatchInfo.largeModRes) {42     TinkerZipEntry largeZipEntry = oldApk.getEntry(name);43     if (largeZipEntry == null) {44         TinkerLog.w(TAG, "large patch entry is null. path:" + name);45         manager.getPatchReporter().onPatchTypeExtractFail(patchFile, resOutput, name, type, isUpgradePatch);46         return false;47     }48     ShareResPatchInfo.LargeModeInfo largeModeInfo = resPatchInfo.largeModMap.get(name);49     ResUtil.extractLargeModifyFile(largeZipEntry, largeModeInfo.file, largeModeInfo.crc, out);50     totalEntryCount++;51 }52 53 for (String name : resPatchInfo.addRes) {54     TinkerZipEntry addZipEntry = newApk.getEntry(name);55     if (addZipEntry == null) {56         TinkerLog.w(TAG, "add patch entry is null. path:" + name);57         manager.getPatchReporter().onPatchTypeExtractFail(patchFile, resOutput, name, type, isUpgradePatch);58         return false;59     }60     ResUtil.extractTinkerEntry(newApk, addZipEntry, out);61     totalEntryCount++;62 }63 64 for (String name : resPatchInfo.modRes) {65     TinkerZipEntry modZipEntry = newApk.getEntry(name);66     if (modZipEntry == null) {67         TinkerLog.w(TAG, "mod patch entry is null. path:" + name);68         manager.getPatchReporter().onPatchTypeExtractFail(patchFile, resOutput, name, type, isUpgradePatch);69         return false;70     }71     ResUtil.extractTinkerEntry(newApk, modZipEntry, out);72     totalEntryCount++;73 }74 75 //最后对resouces.apk文件进行MD5检查，判断是否与resPatchInfo中的MD5一致76 boolean result = SharePatchFileUtil.checkResourceArscMd5(resOutput, resPatchInfo.resArscMd5);

 1 public static boolean loadTinkerResources(Context context, boolean tinkerLoadVerifyFlag, String directory, Intent intentResult) { 2     if (resPatchInfo == null || resPatchInfo.resArscMd5 == null) { 3         return true; 4     } 5     String resourceString = directory + "/" + RESOURCE_PATH +  "/" + RESOURCE_FILE; 6     File resourceFile = new File(resourceString); 7     long start = System.currentTimeMillis(); 8  9     if (tinkerLoadVerifyFlag) {10         if (!SharePatchFileUtil.checkResourceArscMd5(resourceFile, resPatchInfo.resArscMd5)) {11             Log.e(TAG, "Failed to load resource file, path: " + resourceFile.getPath() + ", expect md5: " + resPatchInfo.resArscMd5);12             ShareIntentUtil.setIntentReturnCode(intentResult, ShareConstants.ERROR_LOAD_PATCH_VERSION_RESOURCE_MD5_MISMATCH);13             return false;14         }15         Log.i(TAG, "verify resource file:" + resourceFile.getPath() + " md5, use time: " + (System.currentTimeMillis() - start));16     }17     try {18         TinkerResourcePatcher.monkeyPatchExistingResources(context, resourceString);19         Log.i(TAG, "monkeyPatchExistingResources resource file:" + resourceString + ", use time: " + (System.currentTimeMillis() - start));20     } catch (Throwable e) {21         Log.e(TAG, "install resources failed");22         //remove patch dex if resource is installed failed23         try {24             SystemClassLoaderAdder.uninstallPatchDex(context.getClassLoader());25         } catch (Throwable throwable) {26             Log.e(TAG, "uninstallPatchDex failed", e);27         }28         intentResult.putExtra(ShareIntentUtil.INTENT_PATCH_EXCEPTION, e);29         ShareIntentUtil.setIntentReturnCode(intentResult, ShareConstants.ERROR_LOAD_PATCH_VERSION_RESOURCE_LOAD_EXCEPTION);30         return false;31     }32 33     return true;34 }

 1 public static void monkeyPatchExistingResources(Context context, String externalResourceFile) throws Throwable { 2     if (externalResourceFile == null) { 3         return; 4     } 5     // Find the ActivityThread instance for the current thread 6     Class<?> activityThread = Class.forName("android.app.ActivityThread"); 7     Object currentActivityThread = getActivityThread(context, activityThread); 8  9     for (Field field : new Field[]{packagesFiled, resourcePackagesFiled}) {10         Object value =http://www.mamicode.com/ field.get(currentActivityThread);11 12         for (Map.Entry<String, WeakReference<?>> entry13             : ((Map<String, WeakReference<?>>) value).entrySet()) {14             Object loadedApk = entry.getValue().get();15             if (loadedApk == null) {16                 continue;17             }18             if (externalResourceFile != null) {19                 resDir.set(loadedApk, externalResourceFile);20             }21         }22     }23     // Create a new AssetManager instance and point it to the resources installed under24     // /sdcard25     // 通过反射调用AssetManager的addAssetPath添加资源路径26     if (((Integer) addAssetPathMethod.invoke(newAssetManager, externalResourceFile)) == 0) {27         throw new IllegalStateException("Could not create new AssetManager");28     }29 30     // Kitkat needs this method call, Lollipop doesn‘t. However, it doesn‘t seem to cause any harm31     // in L, so we do it unconditionally.32     ensureStringBlocksMethod.invoke(newAssetManager);33 34     for (WeakReference<Resources> wr : references) {35         Resources resources = wr.get();36         //pre-N37         if (resources != null) {38             // Set the AssetManager of the Resources instance to our brand new one39             try {40                 assetsFiled.set(resources, newAssetManager);41             } catch (Throwable ignore) {42                 // N43                 Object resourceImpl = resourcesImplFiled.get(resources);44                 // for Huawei HwResourcesImpl45                 Field implAssets = ShareReflectUtil.findField(resourceImpl, "mAssets");46                 implAssets.setAccessible(true);47                 implAssets.set(resourceImpl, newAssetManager);48             }49 50             resources.updateConfiguration(resources.getConfiguration(), resources.getDisplayMetrics());51         }52     }53 54     // 使用我们的测试资源文件测试是否更新成功55     if (!checkResUpdate(context)) {56         throw new TinkerRuntimeException(ShareConstants.CHECK_RES_INSTALL_FAIL);57     }58 }