How to Open/Extract apk file

Sometime you may want to open .apk file for developing purpose, that is all .java and .xml files

 Here I m going to Extract “Go taskManager.apk”

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 To get all Java files..class file 

1: Download file…from link given  

2: Open “Go taskManager.apk” with Winrar archive and copy
   “classes.dex” and paste it into “For java -> dex2jar-0.0.9.9”
     folder.

 3: Now in “dex2jar-0.0.9.9” press left Shift + right Mbutton
      Select   “open command window here” 

 4: Type “dex2jar classes.dex” this will convert dex file to jar File 
      in same folder. 

 5: Open “jd_gui.exe” (java decompiler) and open file that You
      have recently created that is “classes_dex2jar.java”

 6: Now select “File > Save All Source” , which will create zip file
      of all java files. 

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To get XML files.. 

1: Copy “Go taskManager.apk” into “For XML” folder. 

2: In “For XML” folder left Shift + right Mbutton Select “open
     command window here” 

3: Type “apktool d GotaskManager.apk” (If .apk filename contains
    “space” then rename it And type above command )

 4: This will create all xml files..