How do I debug using ADB?

Answer

•  Open Settings, and select “About”.
• Tap on “Build number” seven times.
• Go back, and select “Developer options”.
• Scroll down, and check the “Android debugging” or “USB debugging” entry under “Debugging”.
• Plug your device into your computer.
• On the computer, open up a terminal/command prompt and type adb devices.
• A dialog should show on your device, asking you to allow usb debugging. Check “always allow”, and choose “OK”.