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比较清晰，主要关注r.方法，调用的是. 。ps:这里有个有意思的地方()，其内部实现为：
private void increasingPriority() {TinkerLog.i(TAG, "try to increase patch process priority");try {Notification notification = new Notification();if (Build.VERSION.SDK_INT < 18) {startForeground(notificationId, notification);} else {startForeground(notificationId, notification);// start InnerServicestartService(new Intent(this, InnerService.class));}} catch (Throwable e) {TinkerLog.i(TAG, "try to increase patch process priority error:" + e);}}- 1
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如果你对“保活”这个话题比较关注，那么对这段代码一定不陌生，主要是利用系统的一个漏洞来启动一个前台 。如果有兴趣，可以参考此文：关于进程保活，你所需要知道的一切 。
下面继续回到方法：
# UpgradePatch@Overridepublic boolean tryPatch(Context context, String tempPatchPath, PatchResult patchResult) {Tinker manager = Tinker.with(context);final File patchFile = new File(tempPatchPath);//it is a new patch, so we should not find a existSharePatchInfo oldInfo = manager.getTinkerLoadResultIfPresent().patchInfo;String patchMd5 = SharePatchFileUtil.getMD5(patchFile);//use md5 as versionpatchResult.patchVersion = patchMd5;SharePatchInfo newInfo;//already have patchif (oldInfo != null) {newInfo = new SharePatchInfo(oldInfo.oldVersion, patchMd5, Build.FINGERPRINT);} else {newInfo = new SharePatchInfo("", patchMd5, Build.FINGERPRINT);}//check ok, we can real recover a new patchfinal String patchDirectory = manager.getPatchDirectory().getAbsolutePath();final String patchName = SharePatchFileUtil.getPatchVersionDirectory(patchMd5);final String patchVersionDirectory = patchDirectory + "/" + patchName;//copy fileFile destPatchFile = new File(patchVersionDirectory + "/" + SharePatchFileUtil.getPatchVersionFile(patchMd5));// check md5 firstif (!patchMd5.equals(SharePatchFileUtil.getMD5(destPatchFile))) {SharePatchFileUtil.copyFileUsingStream(patchFile, destPatchFile);}//we use destPatchFile instead of patchFile, because patchFile may be deleted during the patch processif (!DexDiffPatchInternal.tryRecoverDexFiles(manager, signatureCheck, context, patchVersionDirectory, destPatchFile)) {TinkerLog.e(TAG, "UpgradePatch tryPatch:new patch recover, try patch dex failed");return false;}return true;}- 1
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