USB accessories are peripherals that connect to android devices as a USB host.
When connected, the accessory will first identify itself to the android device
by sending manufacturer, product, accessory type and version strings
to the device, and then request the device to enter USB accessory mode.
The device will then enable the USB accessory kernel driver and disable
all other USB functionality except possibly adb
(adb can be used while the android device is connected to the PC
and the PC is running software that emulates a USB accessory)
The class android.hardware.UsbAccessory is used to describe the
currently attached USB accessory.
UsbAccessory contains the manufacturer, product, accessory type
and version strings to identify the accessory.
The accessory can be opened as a ParcelFileDescriptor, which can be used
to communicate with the accessory over two bulk endpoints.
The Intents UsbManager.USB_ACCESSORY_ATTACHED and
UsbManager.USB_ACCESSORY_DETACHED are broadcast when accessories are
connected and disconnected to the device. The USB_ACCESSORY_ATTACHED
contains a UsbAccessory object for the attached accessory as an extra.
The Intent also contains string extras for the manufacturer, product,
accessory type and version strings to allow filtering on these strings.
Change-Id: Ie77cbf51814a4aa44a6b1e62673bfe4c6aa81755
Signed-off-by: Mike Lockwood <lockwood@android.com>
increase the size of the SensorEvent pool from 1 to num_sensors*2.
and make the pool global instead of having an instance per SensorEventListener.
Change-Id: I1bcc53a9b07cd1f96fac6fe6e3b9da074e3cb1fd
* commit 'd2b87091cc30c575496eb78ebea88297da775359':
Update package descriptions with editorial revisions. Notably, this removes exessive info about resources from the content package, because it's not a good location and the info is avilable in the dev guide, but also added some of the info to the Resources class description.
* commit '0f2e2b8b82c7b589bcc603ce57f8ff3d1c947784':
Update package descriptions with editorial revisions. Notably, this removes exessive info about resources from the content package, because it's not a good location and the info is avilable in the dev guide, but also added some of the info to the Resources class description.
Notably, this removes exessive info about resources
from the content package, because it's not a good location
and the info is avilable in the dev guide, but also
added some of the info to the Resources class description.
Change-Id: Ie78af26c9cec66314deb98e53078f48e16c08e70
UsbManager:
- is now a service retrievable via Context.getSystemService(Context.USB_SERVICE).
- provides support for returning a list all connected USB devices
- broadcasts ACTION_USB_DEVICE_ATTACHED and USB_DEVICE_DETACHED when devices
are added and removed from the USB host bus
UsbDevice:
- represents an attached USB device.
UsbInterface:
- represents an interface on a USB device
- devices may have multiple interfaces if they provide multiple
sets of functionality (for example, android phones typically have interfaces
for both USB mass storage and adb)
UsbEndpoint:
- represents an endpoint on a USB interface
- endpoints are used for sending or receiving data
(only in one or the other direction)
UsbRequest:
- encapsulates a send or receive request to be sent over an endpoint
Change-Id: Ieef3e434c62760770ea839070cf5eba1a705967a
Signed-off-by: Mike Lockwood <lockwood@android.com>
- make sure to call onAccuracyChanged only when it actually changes
- only call onAccuracyChanged on Magnetic and Orientation sensors, which
are the only ones to support it.
- for other sensors, call onAccuracyChanged only once with the
SENSOR_STATUS_ACCURACY_HIGH value
Change-Id: Ic861e3d48d3b98dab74ffebe2746576f5b69f371
This change adds a public Java API to use a SurfaceTexture as the
destination of camera preview frames.
Change-Id: If537fed2df12c5c181e2af5f817985c1bda853fb
A new USB host API will be added in an upcoming commit
Change-Id: I5816c10c7acd236d31ab8ae255fc83c77121eea0
Signed-off-by: Mike Lockwood <lockwood@android.com>
Add support for separate USB connected and configuration events
Include both USB connected/disconnected and configuration state
in USB_STATE Intent
Remove redundant USB_CONNECTED and USB_DISCONNECTED Intents
Now we just have the sticky USB_STATE broadcast
Move USB disconnnect rebouncing from Tethering to UsbService
Change-Id: Id13eb0c5d51152d2a538985d680ba1db7d2241dc
Signed-off-by: Mike Lockwood <lockwood@android.com>
In preparation for an upcoming change that will make UsbService into a real system service
Change-Id: Id85d624cfc6b10b49a08105cfaaacc667a492c12
Signed-off-by: Mike Lockwood <lockwood@android.com>
o getSupportedVideoSizes() allows us to retrieve the list of the supported
video sizes from the camera
o getPreferredPreviewSizeForVideoRecording() allows us to retrieve the
preferred/recommended preview size for camcorder applications
bug - 3237021
Change-Id: I52fc9938d389bb411406320b0309775b6f44f4dc
- upadte documentation for rotation vector
- update method dealing with rotation vector to deal with 4 components
- virtual rotation-vector sensor reports all four components
- improve SensorManager documentation layout
Whent he 4-th component of the rotation-vector is present, we can save
a square-root when computing the quaternion or rotation matrix from it.
Change-Id: Ia84d278dd5f0909fab1c5ba050f8df2679e2c7c8
This function doesn't use the same reference coordinate system used
for the rotation matrix, unlike what the documentation previously
stated.
Change-Id: I38abeb74540d33b67f72993b54d7a00a73588dde
* commit 'b20c2e7ca03f5ef2694b20ff9a7a10a7249eb936':
[3163098] Fix bug in angleChange funtion which caused the returned angle change to be zeroall the time. The fix is to use PrevR instead of computing the difference between R and R.
Now overlay does ROT_90 before FLIP_V or FLIP_H. It should be FLIP_V
or FLIP_H first. The formula should be changed after overlay is fixed.
bug:3059865
Change-Id: Ie4366bf7f1fcac7383e8dfc74b1b865997bbbcc6
Display orientation should be considered while setting preview size,
picture size, or thumbnail size.
bug:3051937
Change-Id: I3b6bd1b920e4752ffdfc8aec56a0da9d474dd630
