I have a big problem. Last I copied a CardView with RecyclerView from a video. After that I created a new empty activity, but the Javafile didn't want to accept the corresponding XML file. And if I go with ALT + ENTER he suggests to me to create your xml file, but afterwards he tells me it already exists. So I can open the XML file, the program recognizes it but it is not recognized in the Java data and I cannot select it there either. There a screen shot, There a picture from solution research, And There a photo of the xml File.
Can someone help me there? Thank you in advance!
I was facing the same problem but you just need to close your project and open it again, the error related to activity file will bee removed!!Just try it.....
maybe you need to rebuild your app
1- Build > clean project
2 - Build > Rebuild project
I hope it will work with you .
Delete those two files. Copy the code first.
Go to File ->new activity then create that activity and paste the code there, besides those lines.
Related
I am trying to rename my eclipse android project. I have tried Android Tools -> Rename Application Package. It gave me an error occurred see log.
I can't find any logs and suddenly this happen my project structure shows some blank and garbage packages as shown in picture.I tried deleting it but deleting them deletes my source code too.Any idea will be very helpful..
You can rename classes, packages and projects by right clicking on the class/package/project and choose: Refactor -> Rename. Check the Update references box to make sure all references to the project/class are also changed.
This behavior is totally ok.
A java package corresponds with an folder.
When a package/folder is empty eclipse will show it as "white boxed" without content (no arrow).
Example:
The class "AClass" in "com.me.pckg" corrensponds with
com/me/pckg/AClass.java
This means folder "com" and "me" contains no files. Eclipse represents this a "white boxed" packages (com and com.me). Package "com.me.pckg" is not empty.
Aware eclipse does not show the package structure NOT as hierarchical as you expect it in a file system view.
Vice versa if you put some file/-structure in your project eclipse will show new folders a packages. This happens after a refresh or a restart of eclipse, the later may be perceived as a sudden action.
If you want to change the type in "com.demo.alaramdemo" use Pieter12345 answer(, or just change the name of the folder in the file system)
If you want a more file system like view within eclipse use the "Navigator"-View
Finally i got the answer to this, With the help of a post above by Stefan
and a solution mentioned here on below link http://www.coderanch.com/t/105581/vc/Eclipse-hide-empty-packages
actually i had to create filters available on a inverted triangle in package explorer header.
In that u have to check filter of empty package , empty parent package etc
it worked for me.
Thanks all for the help ... :)
I'm trying to create my first app with Android but I've encountered some problems.
Following a tutorial and making:
new android application -> blank activity
The default result should be:
With MainActivity.java and R.Java inside it.
But instead I've got this:
There are a lot of errors and the R.Java file is missing.
I can obtain a result similar to the tutorial one (with no errors), creating a new android application and unchecking create activity, but this time MainActivity.java under src is totally missing.
Maybe I could copy the MainActivity.java of the first project and put into the second one, but I prefer understand why it doesn't work.
Thanks for the help.
Best regards.
its import library problem
Right click on you application----->Android
under library view ,
check if you have this red error then remove the library and add it again
I wanted to create a Fragment in Android Studio, so I did the following steps:
Right click on package
New -> Android (Other) -> Fragment (List)
Checked both include fragment factory methods? and switch to grid view on large screens
The description said "Creates a new fragment containing a list that can optionally change to grid when on large screens."
Here's the funny part: As I was reading the code to understand how this switching is done, I could not find any code that switched XML files or anything. The only odd thing that I found is that the XML used for the Adapter was called R.layout.fragment_item, but there was no XML called like that in my layout folder.
There were 2 XML called R.layout.fragment_item_list and R.layout.fragment_item_grid. So I though "hey, maybe internally the framework auto decide if going for _grid or _list and that's why it doesn't mark R.layout.fragment_item it as non-existent"
When I was done reading the code, I deleted both R.layout.fragment_item_list and R.layout.fragment_item_gridfrom my layout folder and guess what? R.layout.fragment_item is NOT marked as non-existent, and there is no such file inside my Layout folder.
I already went Build > Clean and Build > Rebuild Project and it still marks it as existent. Am I missing something here? sounds like there is some basic stuff I haven't taken into account.
Just found what was going on. Inside values/refs.xml there was <item name="fragment_item" type="layout">#layout/fragment_item_grid</item> which should be the cause of it.
I had the same issue, I didn't understand your solution as I couldn't see refs.xml in the values folder.
For anybody out there, this is what worked for me:
In Android Studio go to File -> Invalidate Caches / Restart...
I am writing a simple application to get familiar with android programming. Today I want to play with menus. I follow this page!. I first create "menu" folder under "res" and then add "game_menu.xml" in it. However this "R" thing can't get that folder. I tried some refresh to get it 'auto-generated' but it didn't work. I clean for a rebuild, but this time R.java completely dissappeared. How can I make eclipse to recreate R or what is the problem?
Are you sure the R is not creating the appropriate link for the menu?
To find your xml menu, you must type: "R.menu." & hit ctrl+space and all your menu's will pop up.
Try this way.
And if you want to check your R file, if its creating the menu link, search for:
"public static final class menu" in R file
In that class you will find your xml menu's..
are you able to compile ? Check which R you have imported in your code. It should not be the android.R but the one from your project
You have most likely misspelled something in your xml file, or have some other error. If the xml files are not entirely correct (or other resource files), the R. file cannot be built. Go through the file and make sure that everything is error free.
A common mistake is to name the resources with capitals, although the names can only contain small letters.
another common mistake is to use unsupported folder names.
How do I fix this? I already tried removing the R.java and cleaning the project via eclipse, but it doesn't help.
FYI I am trying to get PhotoStream from here: http://code.google.com/p/apps-for-android/, but so far it has been very difficult to get things work.
Okay..... 5 mins later google tells me the correct answer...
http://www.fairtec.at/en/it-blog-mainmenu-16/168-the-type-r-is-already-defined
I just didnt search hard enough.
"The type R is already defined"
That's the message you get in Eclipse if you try to build the Funambol Android Sync Client.
Reason is that you have checked two Builders that try to generate the same class.
You just have to uncheck the Java-Builder from Project->Properties->Builders.
Then the application even works fine in the Emulator.
Delete the R.java from the src folder and rebuild the project. This file will be automatically rebuit during this process.
http://www.fairtec.at/en/it-blog-mainmenu-16/168-the-type-r-is-already-defined
click right to project click properties
Project->Properties->Builders.
unckeck java Builder
delete file R.java
You may want to change your package names. It looks like you are using a 'PhotoStream'.jar which has it's R.class defined at the same package structure as you.
Here is a link to the R.java from the project on Google Code. Notice you are using the same package:
http://code.google.com/p/apps-for-android/source/browse/trunk/Photostream/src/com/google/android/photostream/R.java?r=83
I had the same issue when I imported a project from work. Turning off the Java builder as suggested in the article you found fixed my problem, but when I made code updates they were not reflected in the running app. In my case there was an R.java in my source which I deleted and that fixed my problem.
In my case,
as i m not using any IDE for programming but using command line Android..
i had two xml files, one in layout and other in layout-land. i was using same id "XXX" for both but while declaring i made small mistake
android:id="#+id/XXX" (in layout xml)
android:id="#+id/XXX " (in layout-land xml)
please observe extra space in second id declaration, so while creating R.java they were different and in R.java i had
public static final int XXX=0x7f040046;
public static final int XXX =0x7f040045;
which are same, so please be aware of extra spaces. Thank you