r.java-file

问题 This question already has answers here : Developing for Android in Eclipse: R.java not regenerating (64 answers) Closed 5 years ago . Ive just joined StackOverflow because I just cant find any answers to my problem. :( I have however found other threads on this, and none seem to fix it.. i have no idea why. So basically, i am trying to make an android app, i start up a NEW project and already the R.Java is missing (causing major issues, and i can't even compile from it :( ), ive tried: import

问题 I'm writing my unit tests using gradle in Android Studio. I have the tests located in: src/androidTest/java That works just fine. Now in my tests I want to access a resource that is defined in: src/androidTest/res Specifically, I want to get src/androidTest/res/layout/mylayout.xml. The problem is the R class for my test package or any package for that matter has mylayout defined. I did this on my build.gradle and it didn't make a difference: sourceSets { androidTest.resources.srcDirs = ['src

问题 android.R.attr.selectableItemBackground exists, but how do I add it programatically to an ImageButton? Also, how would I go about finding the answer in the documentation? It's mentioned here, but I don't see any explanation of how it's actually used. Actually, I rarely seem to find the documentation useful, but I'm hoping that's my fault and not that of the documentation. 回答1: Here is an example using answer here: How to get the attr reference in code? // Create an array of the attributes we

问题 I have multiple audio files in res/raw folder. I showing ListView that contains audio files name. I want to play the corresponding audio file when user select into the ListView . I have used setDataSource(path) , but it showing error while playing. How play the audio files directly from that folder? Or Is there any other way? 回答1: add this code in onItemClickListener. listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View view,

问题 I have learned from this question that resources are globally shared in an Android Studio project. I have a project with 3 activities (and more are coming), and I already find pretty messy to have access to every resources in any given activity. Is there a way to allow an activity to access ids only from the associated layout ? eg : I have MainActivity.java, activity_main.xml, Main2Activity.java, activity_main2.xml . I would like to restrict the resources (mainly ids) accessible by

问题 This question already has answers here : R cannot be resolved - Android error (106 answers) Closed 5 years ago . I cleaned my project and now I get a "R cannot be resolved to a variable." It was fine before I cleaned it. I have tried cleaning it again, building the project again, creating a new project and copying all my files over, and I've gone to the Android SDK Manager and installed all the "Android SDK Build-tools" to Install all the options like the other stackoverflow posts have

问题 I'm learning Android (I'm a beginner) and making a program for CheckBox . Everything seems fine, but when I cleaned my project suddenly, R.java was deleted and it's giving an error. I checked three times, but not getting it back. Here is my source code: activity_main.xml <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" >

问题 As you can see,all the android projects in my workspace is now showing cross sign.The R.java file is not generated.It was fine last night and in the morning I cleaned my workspace then suddenly the errors have showed up.I tried everything,cleaning again,restarting eclipse.But no luck.Please help. This is my SDK: 回答1: I got my problem solved by the following steps, Solution Make sure that anything the R. links to is not broken. Fix all errors in your XML files. If anything in the ADKs are

问题 I'm currently using the master / detail flow in my android application project. Now I would like to not only create a list with items with only one string. I'd like to change the standard DummyItem class to the following: /** * A dummy item representing a piece of content. */ public static class DummyItem { public String id; public String content; public String subtext; //Added subtext variable here public DummyItem(String id, String content, String subtext) { this.id = id; this.content =

问题 I have a problem with the drawable class in R.java file. I had drawable hdpi, mdpi, xhdpi... folders in main/res, but drawable was missing so i created it by hand. Main.xml is able to find the image declared but this code in R.java gives an error: public static final class drawable { public static final int 10_device_access_accounts=0x7f020000; public static final int 10_device_access_add_alarm=0x7f020001; public static final int 10_device_access_alarms=0x7f020002; public static final int 10