My Android Studio in activity_main.xml showing this problem: \"Rendering Problems No render target selected\" Help?
Close the emulator if it is previously opened. Then try launching the fragment_main.xml again in design mode.
Restart Android Studio and it should solve the problem
Top menu bar on the left side of the AVD Manager button you have a "Sync Project with Gradle Files" button. Click that. Android Studio may become sluggish for like 5 seconds, but you'll also see a loading wheel in the project files tab, and possibly a yellow bar on the top of activity_main.xml tab saying that Gradle is syncing. In about 5 seconds everything will be up to date, and you will see the device as expected. Hope this helps.
This really works
If it says Gradle Sync failed then download the missing platforms and platforms and then restart
It worked for me..
I was getting the same error and the reason was that in my application the targetSdkVersion was set to version I didn't have setup on my AndroidStudio, error disappeared after I modified that, hope that helps.