I'm doing the entry level tutorial on the official Android docs. I'm currently at this step where I'm creating the second activity:
http://developer.android.com/training/basics/firstapp/starting-activity.html
The problem I'm seeing is in creating the new activity when I have to give it a hierarchical parent in the New Activities popup. I enter the name of the parent (com.juannerito.montaigne.MainActivity) but the popup doesn't recognize it and wont't let me create the new actvity.
Added to that I'm seeing a lot of "cannot resolve symbol" errors in the MainActivity class file. I'm not sure that these errors are having any material difference on the build (though I can't be really sure, as I'm a total noob), but i feel like I have to resolve these issues first before i can fix the real issue I'm having.
I'm using Android Studio 0.26 on MacOS X 10.8.4.
any help gratefully appreciated!
I just did an update to 0.26 and had the same problem. CLosing the project, and restarting Android studio and then opening the project seems to have cleared whatever it was that was causing this.
so, it turns out that Studio is (understandibly) buggy, and that these errors are false negatives...
I can also add the hierarchical parent by hand in the code so the question about the popup is moot too :/
Related
I am designing a UI from a tutorial online.
The code doesn't underline any errors, the error pops up only when I try to build and test the app on my device.
you need to use the right attribute sometimes android studio did not show you the suggestion therefore you need to know the lower and upper cases use in XML. Below is the code that will solve your problem.
layout_constraintTop_toTopOf=""
Spelling mistake:
layout_constraintstop_totopof=""
instead of layout_constraintTop_toTopOf=""
If this is a stupid question because I made some terrible mistake, please let me know. Anyways, I just encountered the error and after searching on internet for quite some time, the only similar error that I could find was here But my situation was different.
1). I tried to create a new project from File menu of a previous project.
2). I clicked on Basic Activity and selected mininimum supported API to be 19.
3). I was following this tutorial by Google Developers.
4). I was previously able to successfully build and run from Empty Templates, but now, even they show this same error.
Here are two screenshots: Error & Window
I have tried to restart computer. I have NOT yet tried to download and re-install Android Studio yet. I do not know of any good troubleshooting besides restarting computer; so, if someone wants to share some tips, please be kind enough to do it.
I have not edited or tried to do anything in the automatically created project. I have not editted any file, until I noticed that even #color/primaryColor could not be resolved. So, I went on to look into the res/values/color file and found out that it had no color values in it, instead there was a single line: androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-au. So, I checked further, and found out that many of the automatically generated files had several errors in them.
I am on a Windows 10 machine. Please help, if this question needs to be edited, please let me know. Thanks a lot in advance.
Noob Android Studio 3.6.1 on Mac Mojave developer here. I have a very simple app with a few activities. Every so often, the Kotlin class for one of the activities will complain of an unresolved reference to the corresponding layout XML file.
For example, in the Kotlin Class (TraceActivity.kt), I have the following code:
setContentView(R.layout.activity_trace)
and the corresponding XML file lives at:
MyApp/app/src/main/res/layout/activity_trace.xml
All pretty standard stuff I reckon. But setContentView would complain that it couldn't resolve activity_trace. This has happened on a few occasions, and I discovered that restarting would resolve the problem. But this morning, it isn't helping. And it's also started complaining about some of the strings I've added to strings.xml
I managed to get round the errors by making use of the full names for each of the items e.g.
com.mysite.myapp.R.layout.activity_trace
and
com.mysite.myapp.R.string.my_message
So my guess (as a noob) that somewhere it's losing track of where it is. And yet my other activities are perfectly happy when I omit the full location. Can anyone offer some insight here? Thank you - SO is awesome.
I want to start learning Android programming and recently downloaded the Android Studio. Now if I want to start a new project, I can't get past this initial screen. Whenever I click next, the window just jerks, which I guess is indicating that I am doing something wrong. So how can I solve this problem?
Note: I am a total beginner but I am genuinely trying to learn and searching the web for the problem didn't give me any solution.
I guess something is wrong with your Android Studio / JDK installation. In the status bar on the bottom, I can see a NullPointerException. I think this is the cause. Try to open the Android Studio Log and hopefully the error is better explained there.
How to find Android Studio Log
Maybe you have unknown characters in your package name like "ı,ö,ü" ? And you may want to watch a android starter tutorial video which has a part about starting a project to see if you are doing something wrong?
If it couldn't be a good answer sorry for it but that's all i can offer :3
I am a complete newbie who has just about started android app. development using Xamarin Forms and VS2012. Only about 20-21 days of exposure I have got. I am trying to learn along the way through writing an imaginary practice app. But there are some errors I am getting. You can see them in the picture.
http://imagebin.ca/v/29PeHoLhwW1i
Can someone direct me what exactly it is saying and what I need to do in order to rectify them?Is there something wrong with the installation/environment or like some update? Or is it something else? What's with the "unzipping failed" message?
Some one kindly help me out here please. Facing great deal of difficulty in tackling this.
Many Thanks in advance.
As the error message says (see the third error message ), you need to install the "Android Support Repository" from the Android SDK manager.
The errors are telling you that Xamarin is looking for the support library, but that it cannot find the support library and thus the build failed.
#Tanis.7x and #Jason.
Just an update I want to post:
I went about reproducing this scenario: creating a new project, do some primary simple code, add 1,2 layouts et all. When I build the new project, these 9 errors don't appear. This is strange to me. Because: this is exactly what had happened to my main work also. These errors were not there. Something, somewhere happened along the line, due to which they started appearing suddenly; out of the blue. I remember, I had updated Xamarin version, also just added some packages like JSON.Net and it is only after that this error list appeared. Not before that, if I remember correctly. Which is weird to me. If you try to recreate by creating a brand new project these 9 errors won't appear. I tried recreating this twice; no errors.
Yes, I'm manually downloading the zip file. Hopefully this makes the compiler happy. I'll keep posted about the updates.
Thanks All!