r.java-file

What is the concept behind R.java?

牧云@^-^@ 提交于 2019-11-27 08:33:52
In android R.java is used to provide access to resources defined in XML files. To access the resource we need to invoke findViewById() method passing in the id of the resource to be fetched. This is similar to Spring where beans are defined in a XML context and are fetched by using application context. context.getBean("beanId") This provides loose coupling since the beans are defined externally and could be changed without making modifications to the code. This has me confused. Though what Android does looks similar to spring, what advantage does it offer? What is the point of having an

Fixing Error in styles.xml to generate R.java : No resource found name 'Theme.AppCompat.Light'

耗尽温柔 提交于 2019-11-27 08:28:48
I am new to Android and am trying to run my first program. However, based on my searches across the internet, I think that I can't import mypackage.R because r.java has not been generated because of errors in my style.xml files. I have searched around trying to figure out how to fix these but I can't find a fix that works. The error in styles.xml is error: Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Light' Does anyone know how to fix this? ![Errors in style.txt][1] Here is the code I am using: package com.example.test; import android.os

R file is missing android

泪湿孤枕 提交于 2019-11-27 05:28:36
i was using Eclipse Helios but due to performance issues i changed to Eclipse Galileo and installed the ADT plugging, and added my sdk folder to Elcipse Preferences. Now R.java disappeared from all of my projects. How can i fix this, i did Project/Clean but that won't generate the files, there's nothing wrong in my xml and there's no out.xml in any of my projects. Thanks in advance I had this same issue today and figured it out. The reason this happens so often when including external/example files is because often times these examples reference layouts in your application, but do not have

In Android applications what is the role of “R.java”? [closed]

与世无争的帅哥 提交于 2019-11-27 05:23:40
Android applications have an automatically generated file called "R.java". Please explain its purpose. E.g. What is contained in it? What generates it? Duplicate: What is the concept behind R.java? jeet Every application uses resources such as strings, drawbles, layouts, and styles. Instead of hard coding such resources into an application, one externalizes them and refers to them by ID. The R.java file contains all those resource IDs, whether assigned by the programmer or generated by the sdk. R.java is where you have access to anything you have in your resources: Drawables Layouts Strings

Android ADT version 22, R.java files not generated

可紊 提交于 2019-11-27 04:44:39
问题 After upgrading to Android ADT version 22 and cleaning my project, the R.java files went missing. I can't use setViewContent(R.layout.activity_main) because the activity cannot reference to the xml layout (due to the missing R.java). Also, when using the (ctrl + space) to get suggestions for setContentView, the code is not typed in. Upon looking at the error log, it shows that there was an "Unhandled event loop exception". The plug-in involved is the org.eclipse.ui. Also, whenever I create a

Error: Unable to open class file R.java [duplicate]

两盒软妹~` 提交于 2019-11-27 03:02:44
问题 This question already has answers here : Developing for Android in Eclipse: R.java not regenerating (64 answers) Closed 5 years ago . Did a fresh install of Eclipse, JDK and android-sdk. I am currently receiving this error when creating a new project [2010-09-26 16:07:56 - Test] ERROR: Unable to open class file C:\workspace\Test\gen\com\example\test\R.java: No such file or directory What's the reason for this and how do I fix it? Eclipse Helios 32 bit java version "1.6.0_21" Android sdk API 8

R.java file not getting generated

可紊 提交于 2019-11-26 23:29:50
问题 I'm unable to the R.java problem in my half built Facebook app. I have selected the "Build automatically" option, I cleaned my project. I did all the recommended solutions to generate my R.java file.But still no success. I have 2 R.java in my "gen" folder. I have put a screenshot for better understanding. all the buttons, textview and imageviews are not being recognized. 回答1: Try this: I have similar problem R.java not found error it is actually not getting generated I did almost every thing

What is the concept behind R.java?

倖福魔咒の 提交于 2019-11-26 17:45:59
问题 In android R.java is used to provide access to resources defined in XML files. To access the resource we need to invoke findViewById() method passing in the id of the resource to be fetched. This is similar to Spring where beans are defined in a XML context and are fetched by using application context. context.getBean("beanId") This provides loose coupling since the beans are defined externally and could be changed without making modifications to the code. This has me confused. Though what

Missing R.java file even though project cleaned

余生颓废 提交于 2019-11-26 16:35:00
问题 Every time in code that I have an R, I get an error R cannot be resolved to a variable. The R.java file appears to be missing. I have tried cleaning the project. 回答1: This can happen when you have an error in one of your xml files (for example, a resource cannot be found). This can also happen because of using menus (I have had this problem because of menus, and I had to remove them, clean and add them again). And another possible reason is that you initially wanted to have your R class not

Fixing Error in styles.xml to generate R.java : No resource found name 'Theme.AppCompat.Light'

[亡魂溺海] 提交于 2019-11-26 14:09:31
问题 I am new to Android and am trying to run my first program. However, based on my searches across the internet, I think that I can't import mypackage.R because r.java has not been generated because of errors in my style.xml files. I have searched around trying to figure out how to fix these but I can't find a fix that works. The error in styles.xml is error: Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Light' Does anyone know how to fix this?