How to assign permissions to open url on Android application?

The solution to view external url on webview object is to put or give Internet permission:
...
<uses-permission android:name="android.permission.INTERNET" />
...
This line should be at AndroidManifest.xml.

Best regards,

How to solve 'ANDROID_SDK_ROOT is undefined'?

After a brief reading over Internet using Android Studio 1.5 default installation, I have named several issues, one of them is the use of API 23 or Android 6 because of demo version the components are not well suited, several of the problems are solved executing ./android in the folder ~/Android/sdk/tools ,install the recommend SDK's like API 18 or below...

Try avd monitor we have following errors like:

emulator: ERROR: This AVD's configuration is missing a kernel file!!
emulator: ERROR: ANDROID_SDK_ROOT is undefined

The solution is to soaring ./android again and install sources of each API installed.