Android Studio 3.1.3 having issues with Constraint layout

Question

I\'m trying to start a new project here but this problem is appearing. I can run the project and deploy it in an emulator but this Render problem and Using private resources

Answer 1

I had the same issues. For me, the reason is my project "Automatically convert third-party libraries to use AndroidXhas". Check if your problem same as mine? please simply follow the two steps described here.

to make it easy:

1st step: Please check your gradle.properties, if you see the following lines, you might have the exact same issues as mine. You can firstly delete them.

android.useAndroidX=true
android.enableJetifier=true

2nd step: in main activity, I changed

import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

into

import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;

Everything works all of sudden!

Answer 2

1. On the left-hand side, click app.
2. Then, open the res folder.
3. Open up the values folder.
4. Click on the 'styles.xml' folder.
5. Change the parent variable to "Base.Theme.AppCompact.Light.DarkActionBar"