@Override
public void startActivity(Intent intent) {
    this.startActivity(intent, null);
}

@Override
public void startActivity(Intent intent, @Nullable Bundle options) {
    if (options != null) {
        startActivityForResult(intent, -1, options);
    } else {
        // Note we want to go through this call for compatibility with
        // applications that may have overridden the method.
        startActivityForResult(intent, -1);
    }
}

public void startActivityForResult(@RequiresPermission Intent intent, int requestCode) {
    startActivityForResult(intent, requestCode, null);
}

protected static boolean tryRecoverDexFiles(Tinker manager, ShareSecurityCheck checker, Context context,
                                            String patchVersionDirectory, File patchFile) {
    // 检查是否开启支持dex补丁开关                                        
    if (!manager.isEnabledForDex()) {
        TinkerLog.w(TAG, "patch recover, dex is not enabled");
        return true;
    }
    // 检查补丁包中的 dex_meta.txt 是否存在
    String dexMeta = checker.getMetaContentMap().get(DEX_META_FILE);

    if (dexMeta == null) {
        TinkerLog.w(TAG, "patch recover, dex is not contained");
        return true;
    }

    long begin = SystemClock.elapsedRealtime();
    // 到这个方法中执行具体的操作
    boolean result = patchDexExtractViaDexDiff(context, patchVersionDirectory, dexMeta, patchFile);
    long cost = SystemClock.elapsedRealtime() - begin;
    TinkerLog.i(TAG, "recover dex result:%b, cost:%d", result, cost);
    return result;
}

public static void onReceiveUpgradePatch(Context context, String patchLocation) {
    Tinker.with(context).getPatchListener().onPatchReceived(patchLocation);
}

private static boolean validateAppSignature(Context context, String apkSignature) {
    try {
        PackageManager packageManager = context.getApplicationContext().getPackageManager();
        PackageInfo packageInfo = packageManager.getPackageInfo(context.getPackageName(), PackageManager.GET_SIGNATURES);
        for (Signature signature : packageInfo.signatures) {
            String lowerCaseSignature = signature.toCharsString().toLowerCase();
            if (lowerCaseSignature.equals(apkSignature)) {
                return true;
            }
        }
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    }
    return false;
}

final boolean isEnabledForNativeLib = ShareTinkerInternals.isTinkerEnabledForNativeLib(tinkerFlag);

if (isEnabledForNativeLib) {
    //tinker/patch.info/patch-641e634c/lib
    boolean libCheck = TinkerSoLoader.checkComplete(patchVersionDirectory, securityCheck, resultIntent);
    if (!libCheck) {
        //file not found, do not load patch
        Log.w(TAG, "tryLoadPatchFiles:native lib check fail");
        return;
    }
}

//check resource
final boolean isEnabledForResource = ShareTinkerInternals.isTinkerEnabledForResource(tinkerFlag);
Log.w(TAG, "tryLoadPatchFiles:isEnabledForResource:" + isEnabledForResource);
if (isEnabledForResource) {
    boolean resourceCheck = TinkerResourceLoader.checkComplete(app, patchVersionDirectory, securityCheck, resultIntent);
    if (!resourceCheck) {
        //file not found, do not load patch
        Log.w(TAG, "tryLoadPatchFiles:resource check fail");
        return;
    }
}