USBMonitor.java 文件源码

/**
 * open specific interface
 * @param interfaceIndex
 * @return
 */
public synchronized UsbInterface open(final int interfaceIndex) {
    if (DEBUG) Log.i(TAG, "UsbControlBlock#open:" + interfaceIndex);
    final UsbDevice device = mWeakDevice.get();
    UsbInterface intf = null;
    intf = mInterfaces.get(interfaceIndex);
    if (intf == null) {
        intf = device.getInterface(interfaceIndex);
        if (intf != null) {
            synchronized (mInterfaces) {
                mInterfaces.append(interfaceIndex, intf);
            }
        }
    }
    return intf;
}