Where I'm looking for ConstraintLayout
As in the picture, I am unable to look for ConstraintLayout dependency there. But when looking through Android Sdk folder, it's there, which is currently 1.0.0-alpha6. This happens after updating to AS Beta, not sure if it was because of that.
P/S: Sorry if there's mistake in the way I am asking question, I'm new in here.
ConstraintLayout is now distributed via the SDK Manager -- go to Tools > Android > SDK Manager menu item to start it, then click on SDK Tools. In the Support Repository section you should see an item called "ConstraintLayout for Android" -- select it to install it (it will automatically install the solver library).
Once that's done, you can simply drag a ConstraintLayout from the palette to the design surface:
This will automatically add the dependency to constraint layout in your build.gradle file. Alternatively, you can also add the dependency manually as you found out :)
After working on some workarounds, I found out that just by manually adding the following line to module level build.gradle file:
compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha6'
Related
After update android studio to 2.1 when I create project with basic activity then it shows me error like below.
I tried to change android API and also change project theme in style.xml file,but still shows same error
I guess you get this error because you haven't add support.design library to your project correctly.
Doing these steps may solves your problem:
0- Change the target for the preview in the top right button of the preview area, like this:
1- Go to your SDK Manager and under the 'extras' section, check 'Android Support Library' and check it for installation. if you have done that before.
2- Add Support.design library to your build.gradle file:
compile 'com.android.support:design:24.1.0'
Then click "Synch Now" and gradle will get that library for you. then you can use support.design widgets in your UI.
3- Change res/values/styles.xml like this:
<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar"/>
I believe your SDK is not update correctly. Check again your SDK and download & install latest API correctly. for further detail check This post OR This One these both indicate the rendering problem solution.
Change the parent layout
<CoordinatorLayout> to <LinearLayout> or <RelativeLayout>
will solve your problem
When I am setting up gradle, I have to add something like:
compile 'com.google.android.gms:play-services:6.1+'
I don't like to use the +, so I can always know which version the project is being compiled with and so I can avoid some surprise bugs.
In order to find the Google Play version I have currently downloaded, I usually go to the library XML file which I can find something like: "6171000", which is the version as an integer.
Is it there a simpler way to figure out the version that I need to write on gradle?
cd into your module (eg: app) dir, and run gradle command line ..\gradlew -q dependencies --configuration compile. This will resolve the + , and show you exact version being used for your library. See below.
Or, if you use Android Studio, when you modify/edit the version (eg: simply delete/add + at the end), Android Studio will show a yellow-bulb action with Replace with specific version, click on it to automatically replace the + with exact version available.
Go to this site: http://gradleplease.appspot.com/#play-services
You can also search for any library (Ex. recyclerview). This will help you specify the library's latest version.
I have a project target to API Level 10 and i want to implement the new ActionBar support library.
After follow all the instrutions in the Support Library Setup, when adding the library to my project I came across with dozens of error messages like this:
android-support-v7-appcompat\res\values-v14\styles_base.xml:24: error: Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Holo.....
OK, i know that they are many answers to this question, but, after trying all the more obvious, i still could not solve the error.
I kept searching and found the cause, which is not so obvious, at least for newbies like me.
My intent is provide a full answer to help all those who are like me and do not master all the secrets of the Android development.
This is what you have to do for use the ActionBar support library correctly.
Follow the instructions in the Support Library Setup - Adding libraries with resources.
One thing that can bring some doubt is add the library to your aplicattion project:
(1) In the Project Explorer, right-click your project and select Properties.
(2) At the left pane select Android.
(3) At th bottom of the right pane click Add
(4) Select the library project android-support-v7-appcompat and click OK.
Click OK to close the properties window.
If you not get any of the errors I mentioned it´s all done.
However if you are like me, you dont´t followed the advice of Android team that suggests you always compile your source using the latest SDK, you get the error.
The error ocurrs because my Project Build Target was Android 2.3.3 and need to be at lest 3.0.
It was not immediately clear to me because of the fact that I'm specifically developing for Android 2.3.3 and I'm using support libraries.
OK, I hope this helps.
You should add that support library to your project. To add:
Right click on project, then go to :
properties > Java Build Path > Libraries
here Add External JARs...
add android-support-v7-appcompat.jar (path/to/sdk/extras\android\support\v7\appcompat\libs)
Additionally you also have to copy that jar to libs folder of your project, if it is not there automatically.
and you should use the #style/Theme.AppCompat theme for your application for support-v7 to be working
also keep one thing in mind you should change min sdk version to 11 if you want to support("android:windowActionBar")property in your project.
Why am I having such a hard time getting into the swing of Android development? I've been developing in various languages over the years and, for some reason, just can't seem to get beyond that "jeez-i-still-feel-a-total-noob" stage with Android.
So I'm trying to add an Action Bar to my Android 2.3.3 project. No problem, right? The Android developers website has a nice and clear article explaining exactly how to do it. Of course it involves adding the appcompat v7 support library. No problem, even this is documented step-by-step on this page. But, as with just about every such exercise in Android, I find that you can do exactly what the page tells you to do, it still won't work without significant amount of Googling to fix the errors that you encounter afterwards.
So I've followed the steps under "Using Eclipse" in the section "Adding libraries with resources" in the above link. The first error I get is Unable to resolve target 'android-16'. No problem, this one I could figure out for myself but I'm curious, is there anything in the documents I've been following that would have suggested to me that I need Android 4.1.2 (API16) installed? Did I just read right over it or should I have known by myself that, to do what I'm trying to do, I would need API16?
Never mind, at least I can fix that but then I get a new problem. As soon as I add the android-support-v7-compat library to my project and click the OK button, the console output lights up with errors, the first one being:
C:...\android-support-v7-appcompat\res\values-v14\styles_base.xml:24:
error: Error retrieving parent for item: No resource found that
matches the given name 'android:Widget.Holo.ActionBar'.
and the other 60 odd errors are similar but for different given names.
I would really appreciate if anyone could help me out here. Obviously I'd like to know how to solve this particular problem but if anyone could give me some tips on how to get past this very frustrating stage of learning this new development environment, I would be ever so thankful. What is it that I should have done differently not to run into these kinds of errors, other than following the instructions on the Android Developers website step by step?
OK, I guess I should post an answer as I've eventually managed to solve my own problem.
It turns out I have to use a build target of Android 4.2.2, regardless of the fact that I'm specifically developing for Android 2.3.3 - I mean, that's why I'm using support libraries after all. I imagine it might be possible that some other lower target (but higher than 2.3.3) would still work I just used the highest one I have installed and it solved the problem.
How I was supposed to know this from following the step-by-step instructions on the Android Developers website is a mystery to me. The reason I decided to try changing the targetSdkVersion was because of the final section in the page referenced in the question. It reads "If you are increasing the backward compatibility of your existing application to an earlier version of the Android API with the Support Library, make sure to update your application's manifest." Now I'm not increasing the backward compatibility of my existing application. I'm changing an existing application that targets 2.3.3 to be able to include an Action Bar (seems more like "forward compatibility"). I tried upgrading the targekSdkVersion though as I was out of ideas and lo and behold, it worked.
Don't know if it helps you at all, but I've been struggling with a similar issue for several hours and finally managed to resolve it. In my case, inside my own project's styles.xml file, I was referencing the AppCompat style in the wrong way in the parent attribute.
I was using:
<style name="AppBaseTheme" parent="android:Theme.AppCompat">
where I should have used:
<style name="AppBaseTheme" parent="#style/Theme.AppCompat">
My mistake was in the reference to the theme.
I found that setting the Android target to 2.3.3 for the library project android-support-v7-appcompat solves this issue. You don't need to set your project's target higher, but the library's target lower.
You have pinpointed the all important document and the relevant section "adding libraries with resources":
http://developer.android.com/tools/support-library/setup.html
The error suggests that your project is not able to find these resources. Please double check the following :
You have checked "is library" on the library project
You have exported the jars IN THE LIBRARY PROJECT as described in that section
You have added the library project as a reference to your app project
You have added the android-support-v4.jar to your libs folder in your app project
If this is all definitely correct, check eclipse for any error messages - is it the library project or the app project that lights up like the proverbial Christmas Tree ?
First of all check if you have done all the described steps as explained on the developers site. Then, for the errors :
Unable to resolve target 'android-16'
Make sure that you have installed API16, this errors occurs if you have mentioned your targetsdk to 16 in your Manifest while the sdk for API16 is not installed. You can either install the API or edit the targetApi of your project to the minimum required version, for the support library you are using I think API 11 is the minimum required android version.
android:Widget.Holo.ActionBar
This error should also be fixed once the targetsdk is fixed in your project. Since to use Holo.ActionBar you'l need to target your project to minimum supported api level ie. 11 or higher.
I met similar problems. Using API 18, ADT.
To solve the "Unable to resolve target 'android-16' problem", I remove the import lib project and repeat what the tutorial says.
Then I found I couldn't really "add" the library to my project. (The instruction "In the Library pane, click Add." there is not that detail.
1. In your project -> properties -> Java build path -> Libraries -> Add Library... -> Android Classpath Container -> Select the lib project
2. In your project -> properties -> Android -> add... -> choose the lib -> apply
cheers
Here is how I avoided the error, " Unable to resolve target 'android-16'", when adding v7.
First, I followed the instructions for adding support libraries with resources in eclipse. Following step 4, I clicked Finish. That's when I saw the error message, android-support-v7-appcompat] Unable to resolve target 'android-16'.
Second, I read this post. I also opened the download manager, but did not need anything updated. In order to make sure that I followed the steps exactly as correctly as I could, I deleted the android-support-v7-appcompat project and started over.
This second time I didn't check any different boxes, after all. But, I also got no errors at step 4. Who can say why?
Thanks, Dewald, you expressed in this question the same frustration I have. Is experience the only way out?
If some of your resource xml files cannot find their respective AppCompat references, make sure you also add the support libraries to your project properties. You do this by:
1.) right clicking on your project in the project
2.) Select properties. (Bottom of the menu)
3.) click Android on the left hand side menu of the new pop up window
4.) In the libraries section, click the "add button"
5.) Select the respective libraries. (If none show up, check to see if they are already displayed in the "libraries" window of the pop up menu. If there is a red x by the desired library, try and resolve that issue first.)
6.) Once there is a green checkmark next to the desired libraries, make sure the "Is Library" option in the libraries section IS NOT selected.
7.) Click apply.
8.) Close the pop up menu.
If this doesn't work, let me know and I can help you out. I spent three hours on the problem so I know pretty much all the possible things that can go wrong with the set up.
Go to Project -> uncheck Build Automatically
Go to Project -> Clean... , clean both the library project and your app project
Export your app as a signed APK while Build Automatically is still disabled
I am getting ViewPager.PageTransformer cannot be resolved to a type I have updated the sdk to the latest and have the latest version of android-support-v4 in my libs folder and i read this post ViewPager.PageTransformer showing error ViewPager cant rersolved to a type i am using androidsupportv4 jar revision 9 and did the same steps but it didn't work.
You should remove ViewPager. from the begginging of declaration.
So, that would looks like just PageTransformer
Plus, import android.support.v4.view.ViewPager.PageTransformer;
that worked perfect for me.
Okay, I found the solution. You need to update your Android Support Library package. But if you have it now you need to uninstall it first then install it again in order to get new one.
If you have IntellijIdea:
Open SDK Manager window from "Tools/Android/SDK Manager"
Find Exteras folder then check Android support library. If its status is
installed click "Delete 1 package..." in order to delete it.
Check this package and click on install button.
Navigate to \extras\android\support\v4 then copy
android-support-v4.jar and paste it into your Libs folder.
Idea should recompile the project automatically, however if it didn't do
that then you should recompile it manually by click on
"Build/Rebuild Project"
That's it ;)
Realized I never answered this question. To solve this I grabbed the android-support-v4 from another computer and it worked. This could have the same effect as uninstalling and re-installing but i didn't try it.
At one point I had also found myself with the same issue. Apparently it is because whenever I decide to launch the Android SDK Manager within Eclipse I had been excluding an important step in the update process.
I always 'uncheck' the 'installed' option when trying to update. It was always my assumption that since the other checkmark labelled 'new/updates' would keep the updates visible to the installation. This actually is not the case though. Once I left 'installed' check-marked I saw updates from previously installed components. Then I was able to install the missing features that I thought were already up-to-date on my computer.
Hopefully, you find this helpful for getting the latest. It was misleading to me.
--Edit--
After getting the latest however, the post you referenced was what ended up resolving the issue for me however. I did not find a quick efficient way to sync with the latest version of the compatibility library. It is probably because on creation of the application it copies int he latest version locally into a project. So, you have to manually copy over the latest compatibility library.
Be sure to copy over the latest compatibility library however to all other supporting Android libraries that it also depends on as well. Otherwise you will get build errors with the new compatibility library in you local project settings.
You will need to get the Version 18 of the Android Support Library.
Make sure to update to that version using the SDK manager and then copy "android-support-v4.jar" and "android-support-v13.jar" to "libs" folders of your project.
That should take care of the issue.
Update your android support library from sdk manager.
Copy the android-support-v4.jar from \sdk\extras\android\support\v4 to your project's libs folder.
import android.support.v4.view.ViewPager.PageTransformer
Change ZoomOutPageTransformer implements ViewPager.PageTransformer to ZoomOutPageTransformer implements PageTransformer.
Thats it all errors will be gone and the animation works really well.