Convert .apk files to .jar files

Download .apk file from market

• Download any app from the Android Market [Go]
• Install Astro File Manager from Android Market [Go]  
• Open Astro > Tools > Application Manager/Backup and select the application to backup on SD card.
• Mount the phone as USB and access 'BACKUPAPPS' folder to find the apk of targetapp.(lets call this targetapp.apk).
• Copy it to your hard disk.

Decomiling apk to Dex format

• Download Dex2Jar [GO] 
• Android runs applications which are in Dalvik Executable (.dex) format.
• Run the following command to convert apk to jar.

dex2jar targetapp.apk file(./dex2jar targetapp.apk on terminal)

                                                 File 'targetapp.apk.dex2jar.jar' is created

[Click to Enlarge]

Viewing/Decompiling the Jar files to Java

Method 1 : Use JavaDecomiler (JD)

• Open 'targetapp.apk.dex2jar.jar' with jd-gui [Click to Download]  
• File > Save All Sources to save the class files in jar to java files.

Method 2 : JAD

• Extract contents of jar file on to a folder named src.  Use and unarchival utility like 7zip.
• Keep 'src' folder in the same directory where JAD and targetapp jar is present.
• Open JAD in cmd and execute the following command

jad -o -r -sjava -dsrc src/**/*.class (./jad on terminal)

Now src will contain decompiled Java files ready for manual code review.

Enjoy :)

Source : -blacksecurityup.blogspot.com

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Convert exe files to android apps [apk files]

Download Droidexer 1.2 to convert exe files to apk files and make it to work on your androiddevices! Perfect for exe files not more than 100 MB. The download link is below.

Download from Here..

Link Updated.

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How to edit android apps(APK Files)

You want to edit apk file(android app) directly without the need of eclipse or command line build utility? Yes You can do it using APK Edit Utility.

Steps 

(1) Download APK Edit Software from here. Download apk edit software 

(2) Unzip the zip file and extract its contents. Click on "APK Edit.exe".

(3) First it will ask you to choose Java Executable from "Program Files" folder. Normally it resides in "C:\Program Files (x86)\Java\jdk1.6.0_25\bin". Folder may be different if you have different java version installed or different bits operating system.

(4) Later software will ask you to choose android apk file you want to edit. Browse the apk file you want to edit.

(5) Wait for some time until the Browse link becomes clickable in Details Tab.

(6) Now, click on browse and folder structure will be opened.

(7) You can make small changes like string name change, image change, app name change & save the file to reflect the changes in apk file.

To Change icon or images :- Replace existing images with new images.
To make string changes :- find strings.xml file in res and change the string’s values.
To make app name, package name changes :- Change the android manifest file.

After making all changes, save the file and close the folder structure.  Click On Ok and you will see the android app with all the changes you made.

Also See :- How to use your Broken android.[Even with broken screen]

Source :- technonutty

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How to Download APK Files (Android Apps) from Google Play

Install an app from Google Play and, while the installer takes the form of an APK files, you’re never given the opportunity to download the file directly. Using the APK Downloader extension for Chrome, you can download any APK you need so you have it as a backup.

This does not mean that you can wade into the store and start downloading all of the premium apps and games you’ve always had your eye on. This is not a tool for piracy, but it will enable you to download the APK for any free apps.

Note: Using APK Downloader is against Google’s Terms of Service as it involves accessing Google Play using means ‘other than through the interface that is provided by Google’.

You can download a copy of the extension by paying a visit to Code Kiem. You will need to right click the link to the latest version of the extension and select Save Target As.

To install APK Downloader, click the menu button to the upper right of Chrome and select Settings, click Extensions and then drag the .crx file you have downloaded onto the extensions page – make sure you drag to the center of the page so the ‘Drop to install’ drop zone appears. Click Add and a new icon will appear to the far right of the address bar.

Click the Options link beneath the APK Downloader entry on the Extensions page and you will be asked to provide your email, password and device ID. Enter the email address and password associated with your Google Play account. The extension’s page provides details for why this information is needed.

When it comes to your Android Device ID, there are a couple of options available to you. If you’re using a phone, bring up your dialer and call *#*#8255#*#*. Scroll down through the data that is shown and beneath the JID entry which lists your email address, you’ll find your Device ID in hexadecimal format. We’re interested in the 16 characters that appear after ‘android-‘

If you have a tablet – although you can also do this with a phone – you should download Device ID from Google Play. This provides you with the same information.

Enter all of these details into the Options page for APK Downloader and click Login.

Now you can head over to Google Play and start browsing through the available titles. When you find something you would like to download, open up its page and click the APK Downloader icon at the right hand side of the address bar and save the APK as you would any other download.

If you have trouble downloading APKs, go back and double check that your Device ID has been entered correctly – get it wrong and you’ll see nothing but download errors.

Also See :- An Easy Way to Download APK Files from Google Play

Source :- howtogeek.com

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An Easy Way to Download APK Files from Google Play

Android apps are packaged as APK files. You can use any File Manager app to copy these files from the computer to your Android device and then touch the .apk file to install, or sideload , the corresponding app on your device.

There are various reasons why you may want to download the APK installer of an Android app from the Google Play store:

1. Google Play Store says that a particular app or game is incompatible with your Android device though you know that the app would work just fine.
2. Sometime an Android app may be not be available for download in the Google Play store of your region or country.
3. An app is listed on the Google Play store but you want to install that app on another Android device, like the Amazon Kindle tablet, that doesn’t have the Play Store.

How to Download APK Files from Google Play Store

Evozi, an Android app developer, offers a one-click online APK download app that lets you download the APK installed of any Android app that’s listed on the Google Play store. The downloader app can be accessed at apps.evozi.com.

To get started, enter the web URL of any app listed on the Google Play store and click the “Generated Download Link” button. The APK download app will fetch the APK file from the Google Play store and will host it on its own servers from where you downlaod the file.

Since the APK files are directly fetched from the Google Play Store, it’s unlikely that the Android App will be infected with any malware. Also, to prevent app piracy, the APK downloader only lets you download free apps and games from the Google Play store, not the paid ones.

Source:- labnol

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