Skip to main content

Android Project structure

  • /bin: Contains the compiled java class (.class) files, the dalvik executables (.dex) files etc
  • /gen: Contains the files generated by the android build tools (eg: R.java)
  • /lib: Contains third party libraries (jars) used by the application.
  • /res: Contains resources used by the application like icons, layouts, localized strings etc. Android build tools generate Ids (in the R.java file)  for each resource placed inside the resource folder. Contains the following sub folders,
    • /res/drawable: Contains images with further subfolders for high-density/medium-density and low-density screens.
    • /res/layout: Contains xml files representing the UI layouts of your application.
    • /res/menu: Contains xml files representing the application menus.
    • /res/values: Contains xml files representing externalized strings, colors, styles, dimensions etc.
    • /res/xml: Contains additional xml files need by the application
    • /res/color: Contains additional color resources that adapt to view states
    • /res/raw: Other files needed by your application in their raw form. eg: audio file.
  • /assets: Just like “/res” directory,  you can place static resources needed by the application. The difference is, the  build tools do not generate the Ids for files inside the assets directory.
  • /src : Contains the source code for the application
In addition to the folders above  there are few files worth paying attention to:
  • AndroidManifest.xml : An xml file containing important application details like the name,the activities rendered, the services used etc. This information is needed for the  Android system to run the application code.
  • proguard.cfg: It’s a file for integrating with proguard, a tool that shrinks the size of the application package (.apk) file  and  obfuscates the code to make it harder to reverse engineer.
Labels:

Comments

Post a Comment

Popular posts from this blog

Fragment: App loads with white screen for 3 secs before showing proper UI

Issue: 1) When my application start then white/black screen appears, and then main UI is display.  2) Before my fragment load in activity black/white screen appears for 3/4 seconds and then fragment load. Solution: To fix this nasty problem, update the /res/values/styles.xml to include <item name="android:windowDisablePreview">true</item> or <item name="android:windowBackground">@android:color/black</item> for example : <!-- Application theme. -->  <style name="AppTheme" parent="AppBaseTheme">  <!-- All customizations that are NOT specific to a particular API-level can go here. -->  <item name="android:windowDisablePreview">true</item>  <!-- <item name="android:windowBackground">@android:color/black</item> -->  </style>
1 comment
Read more

Android: The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files

Solution Try the following any one solution and problem will go away: 1)  Apply following steps: Close the project and reopen it. Clean the project (It will rebuild the buildpath hence reconfiguring with the JDK libraries) OR Delete and Re-import the project and if necessary do the above steps again. 2)  Apply following steps: Go to properties of project with the build error (right click > Properties) View the "Libraries" tab in the "Build Path" section Find the "JRE System Library" in the list (if this is missing then this error message is not an eclipse bug but a mis-configured project) Remove the "JRE System Library" Hit "Add Library ...", Select "JRE System Library" and add the appropriate JRE for the project (eg. 'Workspace default JRE') Hit "Finish" in the library selection and "OK" in the project properties and then wait for the re-build of the project Hopefully th
Post a Comment
Read more

Error: Retrieving parent for item: No resource found that matches the given name after upgrading to AppCompat v23

My project is going on easily but suddenly what I found below bugs when developing an app. I know it's minor bug but it may be useful to anyone. Here is the error: Error:(2) Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.Button.Inverse'. Error:(2) Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.Button.Colored'. Solution: This happens because after updates your android studio uses API 23 by default. 1) First check that your compile SDK version must match the support library's major version. If you are using version 23 of the support library, you need to compile against version 23 of the Android SDK. Alternatively you can continue compiling against version 22 of the Android SDK by switching to the latest support library v22.   2) Go to your project structure -> Properties -> and change Build tool version to
1 comment
Read more