android 打印小票
时间: 2024-02-10 09:09:12 浏览: 271
根据提供的引用内容,以下是一个Android连接蓝牙打印小票机的示例代码:
```java
// 导入所需的包
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import java.io.IOException;
import java.io.OutputStream;
import java.util.UUID;
public class BluetoothPrinter {
private BluetoothAdapter bluetoothAdapter;
private BluetoothDevice printerDevice;
private BluetoothSocket bluetoothSocket;
private OutputStream outputStream;
// 连接蓝牙打印机
public void connectPrinter() {
// 获取蓝牙适配器
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
// 获取已配对的蓝牙设备列表
Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
// 遍历设备列表,找到目标打印机设备
for (BluetoothDevice device : pairedDevices) {
if (device.getName().equals("打印机设备名称")) {
printerDevice = device;
break;
}
}
// 获取打印机设备的UUID
UUID uuid = printerDevice.getUuids()[0].getUuid();
try {
// 创建蓝牙socket
bluetoothSocket = printerDevice.createRfcommSocketToServiceRecord(uuid);
// 连接蓝牙socket
bluetoothSocket.connect();
// 获取输出流
outputStream = bluetoothSocket.getOutputStream();
} catch (IOException e) {
e.printStackTrace();
}
}
// 打印文本
public void printText(String text) {
try {
// 将文本转换为字节数组
byte[] data = text.getBytes("GBK");
// 发送字节数组到打印机
outputStream.write(data);
// 刷新输出流
outputStream.flush();
} catch (IOException e) {
e.printStackTrace();
}
}
// 断开蓝牙连接
public void disconnectPrinter() {
try {
// 关闭输出流
outputStream.close();
// 关闭蓝牙socket
bluetoothSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
```
使用上述代码,你可以连接蓝牙打印小票机,并通过`printText`方法打印文本。
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