Null Pointer Exception on Thread

[kevinvanzyl]

Hi, I am getting this whenever I turn Bluetooth off after connecting to a device but am unable to handle the exception and instead app crashes.

java.lang.NullPointerException
at com.zj.btsdk.BluetoothService$AcceptThread.run(BluetoothService.java:316)

[invicnaper]

Have you tried out the app using a real Device ?

[ShreyashPromact]

It is getting crashed after starting of the application. It shows android.os.NetworkOnMainThreadException.

@invicnaper is it possible to print the HTML content by this code?

Sincerely,
Shreyash

[invicnaper]

@kevinvanzyl if your PC do not support Bluetooth , you'll get a Null Pointer Exception while testing it with the Android Emulator .

[arifabas]

Your project is amazing. I want to ask, how can I get webview to read window.print () on android and print on thermal printer zjiang?