R. Java file is not created in Android Application - java

R.java files are not being created in my project.
I have tried solutions like clean the project,removing .jar file from java build code.
Even though it is not working properly, how can I fix this?

Sounds like you're either not using Eclipse, and/or not using the Android eclipse plugin.
Take a look here: http://developer.android.com/sdk/installing.html

If you have not set android SDK then download and set sdk target
Try to clean your project and try to get error which type of error you are getting and solve it
Try to create a new project from existing java, xml, menifest and drawables

I think you are developing in Eclipse (java).
But you need to install the ADT Plugin (see here: http://developer.android.com/sdk/eclipse-adt.html)
After that you must download the Android SDK (Link)
In Eclipse you have to add the SDK.
Window->Preferences under Android -> SDK Location
Now create a new Android project or open an existing project like the API Demo.
The R.java file is generated automatically

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I'm trying to add the latest (v5.1.1) Dropbox plugin to my Android Studio install (Bumblebee 2021.1.1) on Win10. I downloaded the .jar file from releases/v5.1.1 folder to an empty folder, then tried to install it using this method: from the Studio main menu I chose Plugins, selected the gear icon followed by Install Plugin From Disk, browsed to the .jar file location, selected it then pressed OK. I got an error message: "Fail to load plugin from file dropbox-sdk-java-5.1.1.jar". I tried installing the -5.1.1-javadoc.jar file using the same method, with the same result. I don't need the sources, I just want to use the SDK. Any ideas? TIA!
First, I think you meant "Android Studio" instead of "Visual Studio"?
If so, it sounds like you're attempting to install the Dropbox Java SDK as a plugin to Android Studio itself. The Dropbox Java SDK is not an Android Studio plugin though. It is a package for connecting to the Dropbox API from your Java app.
To install the Dropbox package in your app, you should use Maven or Gradle, as instructed here.
The Dropbox Java SDK also comes with an example Android app that uses the Dropbox package.
Thanks, Greg; your answer pointed me in the right direction. I had already added an 'implementation' directive to my Gradle file as per the directions on GitHub. However, I took the instruction to add the directive by editing my "project's build.gradle" too literally; I added it to the Project build.gradle file instead of adding it to the Module build.gradle. Problem solved!

Downloading a libgdx Project Gradle Problems

So my friends and I are making a game for Android and we are using Android studio. We are using libgdx. We are also learning how to use github. Anyways, using Android Studio, I uploaded the basic libgdx setup. The one that just displays the Bad Logic image. My friend downloads it from github using Android studio but there are errors everywhere. It says that it can't find the badlogic package and it gives the following error:
This project does not use the Gradle build system. We recommend that you migrate to using the Gradle build system.
I know that libgdx uses gradle. So what is the problem? Why can't we simply upload and then download a simple project?
Thanks!
Try to remove the .gradle directory and re-import the project or use the Setup App Installer from here to create a new gradle project.
Thanks for the help! I finally figured it out.
Basically, when I imported the project, I was just importing with existing project files. These are the steps I took to get it fixed.
Check out from Version Control using Android Studio and the welcome screen.
When asked to open, say NO.
Go to the folder that is associated with the repo.
Create a local.properties file there and in that file it should have
sdk.dir = /YOUR/PATH/TO/SDK/HERE
Then go back to Android Studio.
Click Import Project and select the folder that has it in there.
From then on, it should work forever as the .gitignore file that is generated by libgdx will ignore the local.properties file when pushed. I hope this helps someone!

Android - Eclipse project making and R file error

I'm having issue with Eclipse and I work in android. This issue happens when I create a new project and when I click finish, It auto generates the project without R file and The project creating window doesn't closes and I have to close it. I have many old projects which work fine(Until now) and the issue is only coming when I make a new project. I also get a error in Styles.xml file saying that "Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Light'". When I press CTRL+RightClick onto R file then it takes me to a window which says "Source Not Found". If you have any solution for this, Please post your answer under this question. Thank you!
EDIT: Appcompat error was solved later.
To solve missing R in generated java files, make sure that Android SDK Tools and Android SDK Build-tools are installed and updated in SDK Manager. Then, make sure Eclipse is updated. After this, clean your project and rebuild.
To solve No resource found "...AppCompat...", make sure Android Support Library is installed and updated in SDK Manager. Then, the AppCompat library can be found at:
android-sdk/extras/android/support/v7/appcompat
You need to reference this AppCompat library in your Android project.
Import the library into Eclipse. To do so:
Right click on your Android project. Select properties. Click 'add...' at the bottom to add a library. Select the support library. Finally, Clean and rebuild your project.

Missing file R.java when creating ZXing library for my app

I'm trying to add the QR scan to my android app. I already know that it's advised to use the Intent method, but the app it's a university project and, therefore, we need to integrate it.
So, I downloaded the pre builded core.jar and the Zxing sources (version 3.0.1), then I created a new Android project with the files in zxing-zxing-3.0.1/android, and then added the core.java in the libs folder and in the build path.
Basically I'm at step 5 of this guide.
The problem is this: my errors do not disappears because the file R.java do not shows up.
I'm using the Android Developing Tools with Eclipse.
R.java is generated by the Android SDK build tools. You didn't build the project yet.
Try these:
look for errors in your layout XML-files
clean your project

Convert Android project to 'regular' Java project inside Eclipse?

Ive inherited some code which started out as an Android project but really is just an API to be used by other applications. Hence, the 'build' process usually just produces a JAR file. The problem Im having is that I get errors from the Android build tools in my console which seem to fire everytime I make a change to some files. How do I fix that?
Im using Eclipse 3.5 (Galileo).
Check run configuration and remove any reference to the Android Sdk.
Create a new Java project and copy project files from the older Android project to the new Java one.
You should copy files: .classpath and .project from other working java project. Next you should edit .project with text editor and change SampleProject to YourProjectName

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