如何获取Android 6+上的USB存储权限？

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

private static final int REQUEST_USB_PERMISSION = 1;

private void requestUsbPermission() {
    UsbManager usbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
    PendingIntent permissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0);
    usbManager.requestPermission(device, permissionIntent);
}

@Override
public void onResume() {
    super.onResume();
    IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
    registerReceiver(usbReceiver, filter);
}

@Override
public void onPause() {
    super.onPause();
    unregisterReceiver(usbReceiver);
}

private final BroadcastReceiver usbReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (ACTION_USB_PERMISSION.equals(action)) {
            synchronized (this) {
                UsbDevice device = (UsbDevice) intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
                if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
                    if (device != null) {
                        // 已获取USB存储权限，可以进行相关操作
                    }
                } else {
                    // 未获取USB存储权限
                }
            }
        }
    }
};

<receiver android:name=".UsbReceiver">
    <intent-filter>
        <action android:name="android.hardware.usb.action.USB_PERMISSION" />
    </intent-filter>
</receiver>