I am trying to build apk from this repository.
I have problem: idea show .java files as invalid, you can see it on this pic:
What am I doing?
I download mentioned (git) sources and copy sources to some directory
I open this directory from IDEA as directory
In project settings I am setting Project SDK as Android 22 and create Android module in Modules section
Downloaded sources require android-support-v7-appcompat lib, so I am getting many errors, like IDEA can't find theme in xml
To remove this error, I had added library android-support-v7 in project settings, added module \android-sdk\extras\android\support\v7\appcompat\ to modules and set android-support-v7 module as dependency for my main android module
I invalidate cache and restart IDEA
After this steps I got xml's without errors about theme (because appcompat library was added), but java files are not looking valid, as I showed on picture above.
Also, I got red Main activity in AndroidManifest.xml file and I can't go to the declaration of the activity by clicking ctrl + LMB on it.
You need to specify the source dir.
Right click on com's parent folder, then Mark directory as and sources root.
Right click on java folder ->mark directory as -> sources root
https://www.jetbrains.com/idea/help/configuring-content-roots.html
Try to check you package...com.yourproject in the imports, try to import the R packge and the rest of your packge like class and other things like import com.yourproject.R.... In the Android Studio rigth click, F4 you also can ser the project proprieties....all i see is that post a awser and let me help you witj this
I have two versions of eclipse and am facing the same problem in both of them. In the src folder whenever I try to create a package as abc.xyz it takes it creates a folder structure directly under the project directory rather than source directory. So finally it looks like this:
MyProject
|--abc
|--xyz
|--src
|--other folders
I check property for abc and xyz and they are showing as folders. Even if I try to create a class inside xyz it will show up at the top level as
MyProject
|--MyClass.java
|--abc
|--xyz
|--src
|--other folders
Additionally MyClass.java will have no package declaration. I also checked that in property window abc is listed as a folder.
Any help appreciated.
Make sure that you are in package explorer view in eclipse. Click on src folder -> build path -> Use as source folder. To avoid this step, use Java Project as a wizard when creating new project in eclipse (Don't use plain project).
So I'm trying to use the jReddit wrapper class because I am developing a reddit app on the android. Here is what I did:
I first went to jreddit and downloaded as a zip
Then I went to eclipse, made a project and copied the files from the extracted folder into the new project. Here's a picture of what it looks like:
Then I used the build.xml from here and "Ran as Ant" to create a jar file in the dist folder as you can see above
I made my android project and copied the jar file into the lib folder and built the path. The project looks like this:
Finally, here is my MainActivity.java. Sorry, I couldn't format the code properly on here
There are no errors, so I can run it on the android. However, when I click the login button to activate the function call onClickBtn, before it can even get into the function it throws an error saying: Could not find class 'im.goel.jreddit.user.User', referenced from method com.example.reddit.MainActivity.onClickBtn
Did I not import this jar in correctly or am i just not using it properly? Why is it compiling fine like it can see the user class but when run on the android it doesn't know what it is?
Extract the contents to the same folder as your other classes. Usually src.
Or
Go to project properties (Alt + Enter) and select Java Build Path (Left panel). Then select Libraries (Top middle). Click the Add External JARs button and select your jar.
I have created several .java files. All of them are located in one directory. I used a text editor to write these files. Now I want to switch to Eclipse. How can I do it? I have tried many ways. None of them works.
ADDED:
I think the common way is to have source in the eclipse folder called "workspace". So, how do I get my files in these directory. Should I use eclipse to create a new project from existing source and Eclipse will put all file to the workspace? Or I should manually copy all my files to the workspace? Where should I put my class files than? Should I create a subdirectory? With which name?
ADDED 2:
When I try to create a project with name "game", the eclipse writes me that a project with such name already exist. But how can I open this project?
ADDED 3:
In my "workspace" I have created a subdirectory called "game". I copied all my .java file into this subdirectory. Then with Eclipse I created a new project with the name game. As a result, Eclipse created .classpath and .project files in the directory "game". It also created bin and src subdirectories. And now I think it is not the correct way to go. The source files are supposed to be in the "src" directory. Right? And at the moment all my .java files are in the "workspace\game".
ADDED 4:
I did it other way around. With Eclipse I have created a new project with the name "game". As the result, Eclipse created a folder called "game" into folder "workspace". In "game" the folder I found "src" folder. I copied all my .java files into this folder. But now in the "Package Explorer" I cannot open "src" folder. So, how can I access my source files from Eclipse? Why Eclipse does not want to open the "src" folder?
Easiest Method:
Put all source files into one directory named after your project. i.e. "ProjectName" You can keep this directory in your workspace or it can be somewhere else.
Start a new project in eclipse and name it using that same project name.
Uncheck the "use default location" box and find the directory where your project is unless your project is already in the workspace - then you must not uncheck the "use default location" box
Click 'next'.
Eclipse should be smart enough to figure out what's going on. After clicking next, it will show you all of the files it found in that directory. It will just automatically add those files to your project. Voilà!
Right-click in the package explorer and select New - Java Project
Create the new project Game
Open the new project in the package explorer - you should see only the source folder called src (there's nothing inside yet)
Open a file Explorer (e.g. Windows Explorer) and drag your sources
Drag them to Eclipse and drop them inside the new src folder - if asked select "Copy files"
Eclipse should put the files into the default package, if that's not correct you can edit the offending files (marked with a red cross) by opening them in Eclipse, selecting the package declaration (usually line 1), pressing Ctrl + 1 and selecting the appropriate option (e.g. "Move xy to package com.game"
This answer is going to be for the question
How to create a new eclipse project and add a folder or a new package into the project,
or how to build a new project for existing java files.
Create a new project from the menu
File->New-> Java Project
If you are going to add a new pakcage, then create the same package name here by
File->New-> Package
Click the name of the package in project navigator, and right click, and import...
Import->General->File system (choose your file or package)
this worked for me I hope it helps others.
Thank you.
The easiest method is really good but you don't get a standard Java project, i.e., the .java and .class files separated in different folders.
To get this very easily:
Create a folder called "ProjectName" on the workspace of Eclipse.
Copy or move your folder with the .java files to the "ProjectName" folder.
Create a new Java Project called "ProjectName" (with the Use default location marked).
Press <Enter> and that's it.
There are two things
1- If its already a Eclipse Project, then simply go to File->Import->General->Existing Project into Workplace
2- Otherwise define project type e.g. Java, Web etc
Create a new project of type you define into your workplace. Copy Paste source , lib and other necessary files. refresh, compile and run project in eclipse.
In the package explorer and the navigation screen you should now see the project you created. Note that eclipse will not copy your files, it will just allow you to use the existing source and edit it from eclipse.
There are several ways to add files to an existing Java project in Eclipse. So lets assume you have already created the Java project in Eclipse (e.g. using File -> New -> Project... - and select Java project).
To get Java files into the new project you can do any of the following. Note that there are other ways as well. The sequence is my preference.
Drag the files into the Navigator view directly from the native file manager. You must create any needed Java packages first. This method is best for a few files in an existing Java package.
Use File -> Import... - select File System. Here you can then select exactly which files to import into the new project and in which Java package to put them. This is extremely handy if you want to import many files or there are multiple Java packages.
Copy the fires directly to the folder/directory in the workspace and then use File -> Refresh to refresh the Eclipse view of the native system. Remember to select the new project before the refresh.
The last one is what you did - minus the refresh...
While creating a project from a full folder may or may not work within the workspace, there's a condition outside of the workspace that prevents starting a new project with a full folder.
This is relevant if you use numerous folder locations for sources, for example an htdocs or www folder for web projects, and a different location for desktop Java applications.
The condition mentioned occurs when Eclipse is told to create a new project, and given a full folder outside the workspace. Eclipse will say the folder isn't empty, and prevent creating a new project within the given folder. I haven't found a way around this, and any solution requires extra steps.
My favorite solution is as follows
Rename the full folder with an appended "Original" or "Backup.
Create the Eclipse project with the name of the full folder before the folder was renamed.
Copy all the relabeled full folders contents into the new project folder.
Eclipse should make a new project, and update that project with the new folder contents as it scans for changes. The existing sources are now part of the new project.
Although you had to perform three extra steps, you now have a backup with the original sources available, and are also able to use a copy of them in an existing project. If storage space is a concern, simply move/cut the source rather than fully copy the original folder contents.
If you creating a new project based on an existing Maven structure :
Create the project using a general project wizard and give the project the same name as just created.
If you try to create the project as a Maven project via m2e will receive an error that project/pom already exists.
Create a new project..
Right Click on your project..
Select Build path --> Configure Build Path
Under source tab choose link source, your .java files containing folder..
I am suggesting this since none of the methods that you tried have worked ---FYI
Follow this instructions from standard eclipse docs.
From the main menu bar, select command link File > Import.... The Import wizard opens.
Select General > Existing Project into Workspace and click Next.
Choose either Select root directory or Select archive file and click the associated Browse to locate the directory or file containing the projects.
Under Projects select the project or projects which you would like to import.
Click Finish to start the import.
A Visual Studio user struggling w/ Eclipse...
I imported a set of servlets/JSPs into a project in Oracle Workshop for Weblogic. /page.jsp has the following import statement:
import="com.foo.bar.*"
Eclipse is displaying an error:
The import com cannot be resolved.
The class that implements the above import is in /WEB-INF/src but I don't know how to build the class in Eclipse to resolve that error. I assumed Eclipse would automagically build the .java file and place the output in /WEB-INF/classes, but it's not doing that.
It could be that I haven't structured my project directories correctly so perhaps that's why Eclipse isn't building my source. Any suggestions? How can I get this to work?
First of all, /WEB-INF/src is a rather strange place to keep your java sources; you may want to move them out of /WEB-INF (into /src in project root, for example)
Either way, you need to tell Eclipse where your sources are and where you want classes built to. It's done in project properties dialog:
Right-click on your project in Eclipse, select Properties
Click on Java Build path on the left
Click source tab on the right
Click Add Folder button and add your source folder (/WEB-INF/src or wherever you moved it to)
Ensure Allow output folders for source folders is checked below
Under newly added source path select output folder and point it to /WEB-INF/classes or other location of your choice.