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OTG: rescan devices before next operation

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This commit is contained in:
Nikita Mikhailov
2016-04-10 23:44:52 +06:00
parent 8cb94c446b
commit 4e543e5368
3 changed files with 58 additions and 19 deletions
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53
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/UsbConnectionDispatcher.java
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@@ -26,13 +26,15 @@ import android.hardware.usb.UsbDevice;
import android.hardware.usb.UsbManager;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.smartcard.UsbTransport;
import org.sufficientlysecure.keychain.ui.UsbEventReceiverActivity;
import org.sufficientlysecure.keychain.util.Log;
public class UsbConnectionDispatcher {
private Activity mActivity;
private OnDiscoveredUsbDeviceListener mListener;
private UsbTransport mLastUsedUsbTransport;
private UsbManager mUsbManager;
/**
* Receives broadcast when a supported USB device get permission.
*/
@@ -41,13 +43,27 @@ public class UsbConnectionDispatcher {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (UsbEventReceiverActivity.ACTION_USB_PERMISSION.equals(action)) {
UsbDevice usbDevice = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
boolean permission = intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED,
false);
if (permission) {
Log.d(Constants.TAG, "Got permission for " + usbDevice.getDeviceName());
mListener.usbDeviceDiscovered(usbDevice);
switch (action) {
case UsbEventReceiverActivity.ACTION_USB_PERMISSION: {
UsbDevice usbDevice = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
boolean permission = intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED,
false);
if (permission) {
Log.d(Constants.TAG, "Got permission for " + usbDevice.getDeviceName());
mLastUsedUsbTransport = new UsbTransport(usbDevice, mUsbManager);
mListener.usbDeviceDiscovered(mLastUsedUsbTransport);
}
break;
}
case UsbManager.ACTION_USB_DEVICE_DETACHED: {
UsbDevice usbDevice = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
if (mLastUsedUsbTransport != null && mLastUsedUsbTransport.getUsbDevice().equals(usbDevice)) {
mLastUsedUsbTransport.release();
mLastUsedUsbTransport = null;
}
break;
}
}
}
@@ -56,11 +72,13 @@ public class UsbConnectionDispatcher {
public UsbConnectionDispatcher(final Activity activity, final OnDiscoveredUsbDeviceListener listener) {
this.mActivity = activity;
this.mListener = listener;
this.mUsbManager = (UsbManager) activity.getSystemService(Context.USB_SERVICE);
}
public void onStart() {
final IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(UsbEventReceiverActivity.ACTION_USB_PERMISSION);
intentFilter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);
mActivity.registerReceiver(mUsbReceiver, intentFilter);
}
@@ -69,7 +87,24 @@ public class UsbConnectionDispatcher {
mActivity.unregisterReceiver(mUsbReceiver);
}
/**
* Rescans devices and triggers {@link OnDiscoveredUsbDeviceListener}
*/
public void rescanDevices() {
// Note: we don't check devices VID/PID because
// we check for permisssion instead.
// We should have permission only for matching devices
for (UsbDevice device : mUsbManager.getDeviceList().values()) {
if (mUsbManager.hasPermission(device)) {
if (mListener != null) {
mListener.usbDeviceDiscovered(new UsbTransport(device, mUsbManager));
}
break;
}
}
}
public interface OnDiscoveredUsbDeviceListener {
void usbDeviceDiscovered(UsbDevice usbDevice);
void usbDeviceDiscovered(UsbTransport usbTransport);
}
}