I cannot drag drop widgets in Android Studio Layout Editor, I have selected blank activity but there is no app background (frame) in workspace

Question

I have installed all sdk and correctly installed but I have tried multiple times but I cannot fine frame of app where I can insert tool,widgets, button, etc. (Cannot add anything on workspace)

My Android studio window image: https://drive.google.com/file/d/0B8AWJ5JO_e0xVV9KVEE0TUpMYWc/view?usp=drivesdk

Answer 1

Looks like you've gotten rid of the Component Tree.

Try go to the Text-tab and paste

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:orientation="vertical"
          android:layout_width="match_parent"
          android:layout_height="match_parent">

</LinearLayout>

or whatever root layout you need...

Answer 2

选择设备，sdk和主题，例如此图片： https : //drive.google.com/open?id=0B7VdJKtF9NwGNVFKeE5zZ2pxVHM