Android Studio - TextView 未显示在设计视图布局中

Question

I am brand new to trying out an android app. I started to follow the online tutorial ( https://developer.android.com/training/basics/firstapp/building-ui ), but getting a bit frustrated at adding a new TextView, as according to the tutorial, it should show in design view, and let me move it around. It is invisible to me in design view though, and I can only see it by running an emulation. Please can someone let me know if I am doing something wrong? or something the tutorial does not tell you? or is this just a bug?

Thank you in advance for any advice you can offer.

Answer 1

There is a bug in latest sdk 28 ,

Change the compileSdkVersion 27

targetSdkVersion 27

and

implementation 'com.android.support:appcompat-v7:27.1.1'

Update:

This is said to fix problem but I did not test it yet

In styles.xml change the parent theme for your app to Base.Theme.AppCompat instead of Theme.AppCompat

Answer 2

I faced this issue too, this is a issue from the latest support.appCompact .

Inside gradle dependencies if your using,

implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'

change to

implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'

This will fix the issue

Answer 3

您可以在组件树中看到它，因此，如果您想修改或删除它，可以从那里进行。

Answer 4

First and foremost, check to see if your dependencies match your SDK level . To check this, go to your app.gradle file and check every highlighted statement for version conflicts.

If this doesn't work, your next debugging step should be to restart your Android studio . Since the view shows in your component tree (and in your emulator), it ought to show in your preview. Previews in android studio lag sometimes due to various reasons (mostly machine related).

If it still doesn't show up after restarting, the problem might be a larger scale IDE issue and you should consider updating your question accordingly.

I hope this helps.. Merry coding!!

Answer 5

Found an easier way than adding code or changing SDK. It is just hidden and you have to show it by checking the "Show layout Decorations"

Hope it helps.

PS it also solves the hidden toolbar problem Picture of where to find it