public interface Connecter
Modifier and Type | Field and Description |
---|---|
static int |
FAIL
失败状态。用于表示发送、连接等状态码
|
static int |
NOT_PERMISSION
没有权限访问
|
static int |
NOT_SUPPORT
不支持
|
static int |
STATE_CONNECTED
已连接
|
static int |
STATE_CONNECTING
连接中
|
static int |
STATE_LISTEN
监听状态
|
static int |
STATE_NONE |
static int |
SUCCESS
成功状态。用于表示发送、连接等状态码
|
Modifier and Type | Method and Description |
---|---|
int |
close()
关闭连接
|
int |
connect()
打开连接
|
int |
connect(int pid,
int vid)
打开连接
|
void |
connect(Observer observer)
打开连接
|
boolean |
isConnected()
连接状态
|
int |
read(byte[] buffer,
int time)
读取数据
|
int |
read(byte[] buffer,
int offset,
int len,
int time)
读取数据
|
boolean |
write(byte[] bytes,
int timeout)
写数据
|
boolean |
write(byte[] bytes,
int offset,
int len,
int timeout)
写数据
|
static final int STATE_NONE
static final int STATE_LISTEN
static final int STATE_CONNECTING
static final int STATE_CONNECTED
static final int NOT_SUPPORT
static final int NOT_PERMISSION
static final int SUCCESS
static final int FAIL
boolean isConnected()
int connect() throws IOException
IOException
- 连接异常STATE_NONE
,
STATE_LISTEN
,
STATE_CONNECTING
,
STATE_CONNECTED
,
NOT_PERMISSION
,
NOT_SUPPORT
void connect(Observer observer)
observer
- 连接状况int connect(int pid, int vid) throws IOException
pid
- usb product idvid
- usb vendor idIOException
- 连接异常int close()
int read(@Nullable byte[] buffer, int time) throws IOException
buffer
- 存放从打印机中读取数据的缓存区域time
- 等待时间,单位:毫秒(ms)IOException
- 读取数据异常int read(@Nullable byte[] buffer, int offset, int len, int time) throws IOException
buffer
- 存放从打印机中读取数据的缓存区域offset
- 缓存数据偏移量(默认为0)time
- 等待时间,单位:毫秒(ms)IOException
- 读取数据异常boolean write(@Nullable byte[] bytes, int timeout) throws IOException
bytes
- 发送到打印机的数据timeout
- 发送超时时间,单位:毫秒(ms)IOException
- 发送数据异常boolean write(@Nullable byte[] bytes, int offset, int len, int timeout) throws IOException
bytes
- 发送到打印机的数据offset
- 偏移量len
- 发送的数据长度timeout
- 发送超时时间,单位:毫秒(ms)IOException
- 发送数据异常