I had a permission to use 'controlTransfer()' method of UsbDeviceConnection
with USB audio device that is connected to Android Host device.
I controlled USB audio device with 'controlTransfer()' and then I released
all of USB resources like below.
if (mUsbDevConnection != null) {
if (mUsbInterface != null) {
mUsbDevConnection.releaseInterface(mUsbInterface);
}
mUsbDevConnection.close();
mUsbDevConnection = null;
}
if (mUsbDevice != null) {
mUsbDevice = null;
}
But when I tried to play a music with other player app, the music sound
wasn't outputted with the USB audio device.
The sound was outputted with the speakder of a android smartphone.
How can I release USB resources of audio device rightly to use the USB
device with other android app?
OR What can I do to use the USB device with other android app without
re-plugin the USB audio device.
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