Question

I am using Android emulator and development platform.

I have created a new application and wonder how can I close or open Android cell phone camera?

Answer 1

If you are talking about opening it from your app you should use the camera Intent for that.

Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
intent.putExtra("android.intent.extras.CAMERA_FACING", 1);
startActivityForResult(intent, 1);

EDIT:

1 – is for the front-facing camera