i m having problem in action buttons for my app. i did as per the tutorial from http://developer.android.com/training/basics/actionbar/adding-buttons.html but i get a red underlined error telling there is no file action_search in R.id and no methods openSearch() and openSettings() i fixed this by manually creating the methods and the action_search file and the app run on my device but the search button doesnot works and i now i cannot delete the action_search from R.id plz help
Have you tried running a clean on your build? Whenever you have issues with R. related things try to clean so the resources get rebuilt. This can sometimes be caused by copy and pasting chunks of code around...
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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 am coding on Eclipse-ADT , right now there are too many xlm files and classes in project. When i want to add some code related to the xml members eclipse stop not responding for about 4-5 minutes. I think the problem is on xml search or verification but i am not sure.
For example , to add button , i write Button button1=(Button)findViewById(R.id.button1)
while coding this , there is no problem before (R.id.button1) , but when i write R.id.button1 eclipse crashes.
I searched the related questions on stackoverflow but couldnt manage the find the problem.
P.S : My original project was somewhere else on computer , if i choose the workspace as original locaiton , my project becomes invisible , so i decided to create a new workspace and import my original project. This may cause a problem but any suggestion how to handle it ?
I think it crashes even if it's just not responding. Maybe you don't have any buttons in the current Activity named "button1".
In the XML file, open the code interface and change respective button_id tag to "button1".
In the .java file change the setContentView tro "main" and add the:
(Button) findViewById(R.id.button1);
in your "main".
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.
I'm working through a book samples programs and i get the same problem whether I create and type the code or whether i download the code already typed, so i'm thinking it's a setup problem.
I get this error in each each class:
setContentView(R.layout.menu) where the "R" is underlined in red and the code won't compile. If i add import android.r like "QuickFix" suggests, the red line goes away from the "R", but then the red line appears under "menu" (in this example). The same behavior occurs in each of the 5 classes that make up the project.
I do have matching layouts for "menu" etc. And (to the best of my knowledge) I registered them as Application Nodes in the manifest file.
It's driving me nuts. Thanks for any suggestions.
You are not supposed to import android.R as it won't resolve your resources. Just remove that import and try to compile again.
If you are working off a tutorial then also check to have the same resources as in the tutorial and also if you decide to name thing different then keep that in mind an reference them by your names.
The R class is generated by Android and contains IDs for all resources in your res folder. Go to your AndroidManifest and locate the package= attribute on manifest. R is in this namespace. So if the namespace is com.yourpackage.blah, you'll want to import com.yourpackage.blah.R;
The problem was that for some reason Eclipse was not autogenerating the gen/R.java file. I don't know why. One time it did generate the file, and a after Project..Clean and Build All everything resolved. Thanks for the input.
Also make sure your file names under res, eg drawables, are OK. I had a file name with capital letter and that prevented the creation of R with the same reference errors that you got. I did not check the error messages and it took me a good 10-20 mns to find this out.
Sometimes this happens to me.
It usually happens that I have been working with some xml element, and before clicking to a java document to hit "run" i just hit "run" while on the xml. I don't really know what happens when you "run" an xml, but it makes this horible file called some_xml_name.out.xml.
DELETE THIS FILE!
This file is the reason why you get so many R related errors, since the Resources library is never really created, or something like that.
That is my advice, without actually seeing the error you're getting in the console.
As i'm new to android, i really couldn't understand the errors or execptions shown in the android DDMS,I'm using Eclipse ..
Can anyone please share some very frequent exceptions that appear in DDMS and how to handle them......
We should explain exceptions here for you? Maybe you should try to read the name of the exception... most of them are named understandable. And the very first thing you should do to learn about exceptions is to read their documentation: the very famous one for example: http://developer.android.com/reference/java/lang/NullPointerException.html
If that didnt help, try to search with google or here on StackOverflow...
If you opened any xml files, this error shoud occur. Close all xml files of your application.
I'm not certain but I'm also having the same problem. I believe it occurs when you try to call something that is out of context. For example if you tried to call
TextView myTextView= (TextView)findViewById(R.id.myTextView);
when you had set a contentView as something that did not contain 'myTextView'
Hope this helps!
I think this type of error occurred when you have edited the .xml file and rebuild the project.
If you have opened any xml files, save all the .xml files and Close all xml files of your application.
and run the project. this way i run my application when this type of error occurred.