蓝牙小票打印机 代码片段分享

var main = plus.android.runtimeMainActivity()  
var BluetoothAdapter = plus.android.importClass(  
  'android.bluetooth.BluetoothAdapter'  
)  
var IntentFilter = plus.android.importClass('android.content.IntentFilter')  
var BluetoothDevice = plus.android.importClass(  
  'android.bluetooth.BluetoothDevice'  
)  
var BAdapter = new BluetoothAdapter.getDefaultAdapter()  

BAdapter.isEnabled()  
BAdapter.enable()  

plus.bluetooth.openBluetoothAdapter({  
  success: function(e) {  
    console.log('open success: ' + JSON.stringify(e))  
    plus.bluetooth.startBluetoothDevicesDiscovery({  
      success: function(e) {  
        console.log('start discovery success: ' + JSON.stringify(e))  
      },  
      fail: function(e) {  
        console.log('start discovery failed: ' + JSON.stringify(e))  
      }  
    })  
  },  
  fail: function(e) {  
    console.log('open failed: ' + JSON.stringify(e))  
  }  
})  

plus.bluetooth.getBluetoothDevices({  
  success: function(e) {  
    var devices = e.devices  
    console.log('get devices success: ' + e.length)  
    for (var i in devices) {  
      console.log(i + ': ' + JSON.stringify(devices[i]))  
    }  
  },  
  fail: function(e) {  
    console.log('get devices failed: ' + JSON.stringify(e))  
  }  
})  

plus.bluetooth.stopBluetoothDevicesDiscovery({  
  success: function(e) {  
    console.log('stop discovery success: ' + JSON.stringify(e))  
    plus.bluetooth.closeBluetoothAdapter({  
      success: function(e) {  
        console.log('close success: ' + JSON.stringify(e))  
      },  
      fail: function(e) {  
        console.log('close failed: ' + JSON.stringify(e))  
      }  
    })  
  },  
  fail: function(e) {  
    console.log('stop discovery failed: ' + JSON.stringify(e))  
  }  
})  
UUID = plus.android.importClass('java.util.UUID')  
uuid = UUID.fromString('00001101-0000-1000-8000-00805F9B34FB') //不需要更改  

device = BAdapter.getRemoteDevice('DC:1D:30:34:62:A6') //这里是蓝牙打印机的蓝牙地址  
plus.android.importClass(device)  
bluetoothSocket = device.createInsecureRfcommSocketToServiceRecord(uuid)  
plus.android.importClass(bluetoothSocket)  

bluetoothSocket.connect() //连接  
bluetoothSocket.isConnected()  

var outputStream = bluetoothSocket.getOutputStream()  
plus.android.importClass(outputStream)  

// 打印字符串  
var s = plus.android.importClass('java.lang.String')  
var string = new s('测试数据' + new Date().getMilliseconds() + '\n\n\n\n') //必须以创建字符串对象的形式创建对象，否则返回NULL  
var bytes = string.getBytes('gbk')  
outputStream.write(bytes)  
outputStream.flush()  

let Util = {  
  RESET: [27, 64], // 复位  
  ALIGN_LEFT: [27, 97, 0], // 左对齐  
  ALIGN_CENTER: [27, 97, 1], // 居中  
  ALIGN_RIGHT: [27, 97, 2], // 右对齐  
  BOLD: [27, 69, 1], // 加粗  
  BOLD_CANCEL: [27, 69, 0], //取消加粗  
  DOUBLE_HEIGHT_WIDTH: [29, 33, 17], //宽高加倍  
  DOUBLE_WIDTH: [29, 33, 16], //宽加倍  
  DOUBLE_HEIGHT: [29, 33, 1], //高加倍  
  NORMAL: [29, 33, 0], //字体不放大  
  LINE_SPACING_DEFAULT: [27, 50] // 设置默认间距  
}  
function setFormat(command) {  
  outputStream.write(command)  
  outputStream.flush()  
}  
function PrintText(text) {  
  var s = plus.android.importClass('java.lang.String')  
  var string = new s(text)  
  var bytes = string.getBytes('gbk')  
  outputStream.write(bytes)  
  outputStream.flush()  
}  
// 获取字符长度  
function GetLength(str) {  
  return str.replace(/[\u0391-\uFFE5]/g, 'aa').length //先把中文替换成两个字节的英文，在计算长度  
}  
// 输出两列，不能超过32字符  
function printTowData(text1, text2) {  
  let textLength1 = GetLength(text1)  
  let textLength2 = GetLength(text2)  
  let blankLength = 32 - textLength1 - textLength2  
  let blank = ''  
  for (let i = 0; i < blankLength; i++) {  
    blank = blank + ' '  
  }  
  return text1 + blank + text2  
}  

PrintText(printTowData('哈哈哈', '嘿嘿嘿'))