Question: I have tried to put it above the MainActivity and(i know that) it doesnt fit there; build error:"The GenerateJavaStub task failed", But I dont know how to do it

```
[Activity(Label = "@string/app_name", Theme = "@style/AppTheme", MainLauncher = true)]
[Application(UsesCleartextTraffic = true)]
public class MainActivity : AppCompatActivity

```

Answer: 
You can see the different kepmaps for the caret movement in the IntelliJ IDE by going to `File->Settings->Keymap`, where in the seach bar you type `Move Caret`.

[![enter image description here](https://i.stack.imgur.com/Tkniy.png)](https://i.stack.imgur.com/Tkniy.png)

In your case you can use `Ctrl+Up` to move the Caret Backwards and `Ctrl+Down` to move it forwards. There are many other bindings that you can use and see in that menu. You can even re-map them all you want!
In a code block, you can use "Code block start" and "Code block end" actions (Cmd-Alt-[, Cmd-Alt-] in the default Mac keymap, Ctrl-[ and Ctrl-] in the default keymap on other operating systems). 

This shortcut doesn't work in the import block, but normally this is not needed because the standard way to work with imports in IntelliJ is to use "Auto import" and "Optimize imports" actions, and you simply never put the caret in the import list.