UsbManager.java

package android.hardware.usb;

/**
 * Created by thom on 2017/3/10.
 */
public class UsbManager {

    public static String ACTION_USB_STATE = "android.hardware.usb.action.USB_STATE";

    /**
     * Boolean extra indicating whether USB is connected or disconnected.
     * Used in extras for the {@link #ACTION_USB_STATE} broadcast.
     * <p>
     * {@hide}
     */
    public static String USB_CONNECTED = "connected";

}