android - Why we are able to view source code of java from jar or apk file -


we know able view source code of android apk file or .jar file using tools available free. how extract code of apk file

with thing few question comes mind.

  1. is security flaw our app code open after compiling , building source code using tools ?

  2. does every thing java world like can view html css jscript codes website free.should compare that.

  3. just .jar file can view code .exe, .command or other files formats think not human-readable.

  4. how prevent code viewing inside apk or jar file.because don't want pain app code should behave open source.

i surprised when able android project .apk file.

  1. suppose company has spend billion dollar in making app firm. , decided make propitiatory not under open source license. want protect if other companies might copy app code create own.

  2. is legal things can prevent code copying.

  3. suppose company creating hotel booking app , spend thousands dollar on other hotel requires same ,they decompile app , change strings , basics things. in way enjoy every thing free.how prevvent situation.

  4. i want protect various things googleanalyticsid, googlgeadsense,googleadword , other premium third party api string prevented how do that.

  1. there no security flaw. known can take compiled code software platform , reverse engineer source code compile code executes similarly.

  2. you can not reconstitute exact original source code compiled code. example, compiled code not have comments in original source code. not have original names of local , parameter variables well.

  3. yes, said in #1.

  4. you cannot stop reverse engineering software products. can make harder so. example, android toolchain provides ability run compiled code through proguard obfuscation tool, as can strip out unnecessary details , change names of classes , methods can modified without changing functionality of code.


Comments

Post a Comment

Popular posts from this blog

javascript - jQuery: Add class depending on URL in the best way -

i have html progress meter: <div class="col-md-3" style="margin-left: -20px;"> <div class="progress-pos active" id="progess-1"> <div class="progress-pos-inner"> login </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-2"> <div class="progress-pos-inner"> scan items </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-3"> <div class="progress-pos-inner"> confirm address </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-4"> <div class="progress-pos-in
Read more

caching - How to check if a url path exists in the service worker cache -

i need check if particular url path exists in service worker cache. example, suppose url is: /myserviceworker/service?a=110&b=70 this url exists in cache, there many of them different values of , b. now, suppose want refresh of these urls, how can that? i want know how access key values service worker cache. if know key, plan follows: var url = new url(key); if(url.pathname === "\/myserviceworker/service") refetch key but not sure how cache key , in format is. mean, string or url? cache api has match() method returns promise resolving in response object if match or undefined if no match exists. second parameter object can specify ignoresearch not take account url parameters. the ignoresearch option supported firefox ( chrome status here ). in other hand, retrieve cache entries, can use keys() method.
Read more

Redirect to a HTTPS version using .htaccess -

i need modify .htaccess file redirect urls https version without "www". http://example.com --> https://example.com http://www.example.com --> https://example.com https://www.example.com --> https://example.com this how .htaccess file looks like: rewriteengine on rewritecond %{request_filename} !-d rewritecond %{request_filename} !-f rewriterule ^(.*)$ redirect.php?id=$1&page=$2 [qsa,l] what modifications need make .htaccess in order forward https without "www"? it depends on doing current code. looks file called redirect trying display php page seo friendly url. think might confusing people. anyway, need , force https without www, need 1 more rule above. also second rule needs two capture groups in rewriterule test string because wanting 2 different values using $1 , $2 references. rewriteengine on #rediect www non www and/or http https --- combinations. rewritecond %{http_host} !^example\.com [nc,or] rewritecond %{https} !^
Read more