private void openAccessory(UsbAccessory accessory) {
mFileDescriptor = mUsbManager.openAccessory(accessory);
if (mFileDescriptor != null) {
mAccessory = accessory;
FileDescriptor fd = mFileDescriptor.getFileDescriptor();
mInputStream = new FileInputStream(fd);
mOutputStream = new FileOutputStream(fd);
Log.d(TAG, "accessory opened");
} else {
Log.d(TAG, "accessory open fail");
}
}
// GIVEN FUNCTIONS
private void openAccessory(UsbAccessory mAccessory2) {
mFileDescriptor = mUsbManager.openAccessory(mAccessory2);
if (mFileDescriptor != null) {
mAccessory = mAccessory2;
FileDescriptor fd = mFileDescriptor.getFileDescriptor();
mInputStream = new FileInputStream(fd);
mOutputStream = new FileOutputStream(fd);
Log.d(TAG, "accessory opened");
} else {
Log.d(TAG, "accessory open fail");
debug.setText("did not open");
}
}
private void openAccessory(UsbAccessory accessory) {
mFileDescriptor = mUsbManager.openAccessory(accessory);
if (mFileDescriptor != null) {
mAccessory = accessory;
FileDescriptor fd = mFileDescriptor.getFileDescriptor();
mInputStream = new FileInputStream(fd);
mOutputStream = new FileOutputStream(fd);
Thread listenThread = new Thread(null, this, "accessoryListener");
listenThread.start();
Log.d(TAG, "accessory opened");
} else {
Log.d(TAG, "accessory open fail");
}
}
// open the accessory here
private boolean openMyAccessory() {
boolean accOpened = false;
if (DEBUG_VERBOSE) Log.d(TAG, "openMyAccessory entered!");
// Next, ask the UsbManager (singleton?) for the ParcelFileDescriptor for the accessory
myParcelFD = androidUsbManager.openAccessory(adkAccessory);
if (myParcelFD != null) {
accOpened = true;
if (DEBUG_VERBOSE)
Log.d("myADK_OpenMyAccessory", "accessory opened. " + myParcelFD.toString());
} else {
Log.e("myADK_OpenMyAccessory", "opening failed :(");
}
if (DEBUG_VERBOSE) Log.d(TAG, "openMyAccessory exited!");
return accOpened;
}
private void openAccessory() {
Log.d(TAG, "openAccessory: " + mAccessory);
mFileDescriptor = mUsbManager.openAccessory(mAccessory);
avalible = true;
if (mFileDescriptor != null) {
FileDescriptor fd = mFileDescriptor.getFileDescriptor();
mInputStream = new FileInputStream(fd);
mOutputStream = new FileOutputStream(fd);
avalible = true;
readTh =
new Thread() {
@Override
public void run() {
final byte[] buffer = new byte[512];
while (true) {
try {
if (mInputStream.available() > 0) {
mInputStream.read(buffer, 0, 512);
tv.post(
new Runnable() {
private byte[] buf = buffer.clone();
public void run() {
tv.append(new String(buf));
}
});
} else {
Thread.sleep(50);
}
} catch (IOException e) {
e.printStackTrace();
return;
} catch (InterruptedException e) {
e.printStackTrace();
return;
}
}
}
};
}
}
/**
* Enables the
*
* @param context The context that the USB manager should register to
* @return RETURN_CODES - the status of the enable request
*/
public RETURN_CODES enable(Context context) {
// Grab the packageName to use for an attach Intent
actionString = context.getPackageName() + ".action.USB_PERMISSION";
PendingIntent permissionIntent =
PendingIntent.getBroadcast(context, 0, new Intent(actionString), 0);
// If the USB manager isn't already enabled
if (enabled == false) {
// Create a new filter with the package name (for the accessory
// attach)
try {
Thread.sleep(500);
} catch (InterruptedException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
IntentFilter filter = new IntentFilter(actionString);
// Also add a few other actions to the intent...
filter.addAction(UsbManager.ACTION_USB_ACCESSORY_ATTACHED);
filter.addAction(UsbManager.ACTION_USB_ACCESSORY_DETACHED);
// and register the intent with the specified context
context.registerReceiver(receiver, filter);
UsbManager deviceManager = null;
UsbAccessory[] accessories = null;
UsbAccessory accessory = null;
// Get a UsbManager object from the specified intent (only works for
// v3.1+ devices)
deviceManager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
// If we were unable to get a UsbManager, return an error
if (deviceManager == null) {
return RETURN_CODES.DEVICE_MANAGER_IS_NULL;
}
// Get a list of all of the accessories from the UsbManager
accessories = deviceManager.getAccessoryList();
// If the list of accessories is empty, then exit
if (accessories == null) {
return RETURN_CODES.ACCESSORIES_LIST_IS_EMPTY;
}
// Get the first accessory in the list (currently the Android OS
// only
// supports one accessory, so this is it)
accessory = accessories[0];
// If the accessory isn't null, then let's try to attach to it.
if (accessory != null) {
// If we have permission to access the accessory,
if (deviceManager.hasPermission(accessory)) {
// Try to open a ParcelFileDescriptor by opening the
// accessory
parcelFileDescriptor = deviceManager.openAccessory(accessory);
// try {
// parcelFileDescriptor.close() ;
// } catch (IOException e1) {
// e1.printStackTrace();
// }
// parcelFileDescriptor = deviceManager
// .openAccessory(accessory);
if (parcelFileDescriptor != null) {
// Create a new read thread to handle reading data from
// the accessory
readThread = new ReadThread(parcelFileDescriptor);
readThread.start();
deviceManager.requestPermission(accessory, permissionIntent);
if (parcelFileDescriptor == null) {
Log.d(TAG, "USBAccessoryManager:enable() parcelFileDescriptor == null");
return RETURN_CODES.FILE_DESCRIPTOR_WOULD_NOT_OPEN;
}
// Open the output file stream for writing data out to
// the accessory
outputStream = new FileOutputStream(parcelFileDescriptor.getFileDescriptor());
if (outputStream == null) {
Log.d(TAG, "USBAccessoryManager:enable() outputStream == null");
try {
parcelFileDescriptor.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return RETURN_CODES.FILE_DESCRIPTOR_WOULD_NOT_OPEN;
}
Log.d(TAG, "USBAccessoryManager:enable() outputStream open");
// If the ParcelFileDescriptor was successfully opened,
// mark the accessory as enabled and open
enabled = true;
open = true;
handler
.obtainMessage(
what,
new USBAccessoryManagerMessage(
USBAccessoryManagerMessage.MessageType.READY, accessory))
.sendToTarget();
Log.d(TAG, "USBAccessoryManager:enable() device ready");
return RETURN_CODES.SUCCESS;
} else {
/*
* If we weren't able to open the ParcelFileDescriptor,
* then we will not be able to talk to the device. Due
* to a bug in the Android v2.3.4 OS this situation may
* occur if a user presses the "home" or "back" buttons
* while an accessory is still attached. In this case
* the attempt to close the ReadThread will fail if a
* read() is in progress on the FileInputStream. This
* results in the ParcelFileDescriptor not being freed
* up for later access. A future attempt to connect to
* the accessory (via reopening the app) will end up
* having the openAccessory() request return null,
* ending up in this section of code.
*/
return RETURN_CODES.FILE_DESCRIPTOR_WOULD_NOT_OPEN;
}
} else {
/*
* If we don't currently have permission to access the
* accessory, then we need to request it. If we haven't
* requested it already...
*/
if (permissionRequested == false) {
// Then go ahead and request it...
deviceManager.requestPermission(accessory, permissionIntent);
permissionRequested = true;
return RETURN_CODES.PERMISSION_PENDING;
}
}
}
return RETURN_CODES.ACCESSORIES_LIST_IS_EMPTY;
}
return RETURN_CODES.SUCCESS;
}
@Override
public void onReceive(Context context, Intent intent) {
/* get the action for this event */
String action = intent.getAction();
/*
* if it corresponds to the packageName, then it was a permissions
* grant request
*/
if (actionString.equals(action)) {
/* see if we got permission */
if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
/* if so, then try to open the accessory */
UsbManager deviceManager = null;
UsbAccessory accessory = null;
deviceManager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
if (deviceManager == null) {
// TODO: error. report to user?
return;
}
accessory = (UsbAccessory) intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
parcelFileDescriptor = deviceManager.openAccessory(accessory);
if (parcelFileDescriptor != null) {
enabled = true;
open = true;
outputStream = new FileOutputStream(parcelFileDescriptor.getFileDescriptor());
readThread = new ReadThread(parcelFileDescriptor);
readThread.start();
Log.d(TAG, "USBAccessoryManager:BroadcastReceiver()-1");
handler
.obtainMessage(
what,
new USBAccessoryManagerMessage(
USBAccessoryManagerMessage.MessageType.READY, accessory))
.sendToTarget();
} else {
// TODO: error. report to user?
return;
}
}
}
if (UsbManager.ACTION_USB_ACCESSORY_ATTACHED.equals(action)) {
/*
* if it was a device attach notice, then try to open the
* accessory
*/
UsbManager deviceManager = null;
UsbAccessory[] accessories = null;
UsbAccessory accessory = null;
deviceManager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
if (deviceManager == null) {
// TODO: error. report to user?
return;
}
accessories = deviceManager.getAccessoryList();
if (accessories == null) {
// TODO: error. report to user?
return;
}
accessory = accessories[0];
parcelFileDescriptor = deviceManager.openAccessory(accessory);
if (parcelFileDescriptor != null) {
enabled = true;
open = true;
outputStream = new FileOutputStream(parcelFileDescriptor.getFileDescriptor());
readThread = new ReadThread(parcelFileDescriptor);
readThread.start();
Log.d(TAG, "USBAccessoryManager:BroadcastReceiver()-2");
handler
.obtainMessage(
what,
new USBAccessoryManagerMessage(
USBAccessoryManagerMessage.MessageType.READY, accessory))
.sendToTarget();
} else {
// TODO: error. report to user?
return;
}
} else if (UsbManager.ACTION_USB_ACCESSORY_DETACHED.equals(action)) {
/*
* if it was a detach notice, then close the accessory and
* notify the user
*/
closeAccessory();
handler
.obtainMessage(
what,
new USBAccessoryManagerMessage(
USBAccessoryManagerMessage.MessageType.DISCONNECTED))
.sendToTarget();
} else if (UsbManager.EXTRA_PERMISSION_GRANTED.equals(action)) {
}
}
