溫馨提示×

溫馨提示×

您好,登錄后才能下訂單哦!

密碼登錄×
登錄注冊×
其他方式登錄
點(diǎn)擊 登錄注冊 即表示同意《億速云用戶服務(wù)條款》

Android下的POS打印機(jī)調(diào)用的簡單實(shí)現(xiàn)

發(fā)布時(shí)間:2020-10-22 04:09:57 來源:腳本之家 閱讀:185 作者:SmilingRye 欄目:移動開發(fā)

本文基于GP58系列,它可以兼容ESC/POS指令集,對EPSON的打印機(jī)通用.

Android下的設(shè)備調(diào)試,如果設(shè)備提供了驅(qū)動,按照廠家的驅(qū)動調(diào)試即可;設(shè)備未提供驅(qū)動,只能按照通用的方法進(jìn)行調(diào)試。這里采用的是調(diào)用USB接口來控制打印機(jī)輸出。

1.首先獲取USB管理器

public UsbAdmin(Context context) { 
    mUsbManager = (UsbManager) context.getSystemService(Context.USB_SERVICE); 
    mPermissionIntent = PendingIntent.getBroadcast(context, 0, new Intent(ACTION_USB_PERMISSION), 0); 
    IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION); 
    context.registerReceiver(mUsbReceiver, filter); 
  }

使用一個(gè)延遲意圖來接收usb接入時(shí)的廣播,當(dāng)廣播接收到時(shí),說明有新的設(shè)備接入。

添加一個(gè)boardcast action

復(fù)制代碼 代碼如下:

private static final String ACTION_USB_PERMISSION = "com.android.example.USB_PERMISSION";

private final BroadcastReceiver mUsbReceiver = 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) { 
              setDevice(device); 
            } else { 
              Closeusb(); 
             // mDevice = device; 
            } 
          } else { 
            Log.d(TAG, "permission denied for device " + device); 
          } 
 
        } 
 
      } 
    } 
  }; 

取到usb設(shè)備的引用,android系統(tǒng)會詢問你是否允許設(shè)備訪問,默認(rèn)為false;當(dāng)允許了訪問之后,會判斷USB的引用是否為null,如果不為空則會調(diào)用setDevice來創(chuàng)建一個(gè)Connection,否則會關(guān)閉本次連接。

在setDevice中,我們可以獲取設(shè)備的功能集(UsbInterface),也可以獲取通信通道(UsbEndpoint),同時(shí)也創(chuàng)建了host與device的連接用來傳輸數(shù)據(jù)。

private void setDevice(UsbDevice device) { 
    if (device != null) { 
      UsbInterface intf = null; 
      UsbEndpoint ep = null; 
 
      int InterfaceCount = device.getInterfaceCount(); 
      int j; 
 
      mDevice = device; 
      for (j = 0; j < InterfaceCount; j++) { 
        int i; 
 
        intf = device.getInterface(j); 
        Log.i(TAG, "接口是:" + j + "類是:" + intf.getInterfaceClass()); 
        if (intf.getInterfaceClass() == 7) { 
          int UsbEndpointCount = intf.getEndpointCount(); 
          for (i = 0; i < UsbEndpointCount; i++) { 
            ep = intf.getEndpoint(i); 
            Log.i(TAG, "端點(diǎn)是:" + i + "方向是:" + ep.getDirection() + "類型是:" + ep.getType()); 
            if (ep.getDirection() == 0 && ep.getType() == UsbConstants.USB_ENDPOINT_XFER_BULK) { 
              Log.i(TAG, "接口是:" + j + "端點(diǎn)是:" + i); 
              break; 
            } 
          } 
          if (i != UsbEndpointCount) { 
            break; 
          } 
        } 
      } 
      if (j == InterfaceCount) { 
        Log.i(TAG, "沒有打印機(jī)接口"); 
        return; 
      } 
 
      mEndpointIntr = ep; 
 
        UsbDeviceConnection connection = mUsbManager.openDevice(device); 
 
        if (connection != null && connection.claimInterface(intf, true)) { 
          Log.i(TAG, "打開成功! "); 
          mConnection = connection; 
 
        } else { 
          Log.i(TAG, "打開失敗! "); 
          mConnection = null; 
        } 
      } 
 
  } 

2.在相關(guān)的類中新建一個(gè)UsbAdmin,調(diào)用openUsb,這里首先是走了上面的setDevice()方法,獲取到了設(shè)備的引用,當(dāng)連接通道建立時(shí)列出所有USB設(shè)備,當(dāng)設(shè)備的引用不存在時(shí)同樣列出所有的USB設(shè)備,并且都請求獲取USB權(quán)限。

public void openUsb() { 
    if (mDevice != null) { 
      setDevice(mDevice); 
      if (mConnection == null) { 
        HashMap<String, UsbDevice> deviceList = mUsbManager.getDeviceList(); 
        Iterator<UsbDevice> deviceIterator = deviceList.values().iterator(); 
 
        while (deviceIterator.hasNext()) { 
          UsbDevice device = deviceIterator.next(); 
          mUsbManager.requestPermission(device, mPermissionIntent); 
        } 
      } 
    } else { 
      HashMap<String, UsbDevice> deviceList = mUsbManager.getDeviceList(); 
      Iterator<UsbDevice> deviceIterator = deviceList.values().iterator(); 
 
      while (deviceIterator.hasNext()) { 
        UsbDevice device = deviceIterator.next(); 
        mUsbManager.requestPermission(device, mPermissionIntent); 
      } 
    } 
  } 

3.當(dāng)上面兩部都走完了之后,我們就可以發(fā)送指令來控制已經(jīng)建立連接的打印機(jī)了,這里我們使用的是標(biāo)準(zhǔn)的ESC/POS指令集,為硬件默認(rèn),貼出代碼,這里的指令集采用的是十進(jìn)制表示形式,也可以替換成十六進(jìn)制。

public class printerCmdUtils { 
 
  /** 
   * 這些數(shù)據(jù)源自愛普生指令集,為POS機(jī)硬件默認(rèn) 
   */ 
 
  public static final byte ESC = 27;//換碼 
  public static final byte FS = 28;//文本分隔符 
  public static final byte GS = 29;//組分隔符 
  public static final byte DLE = 16;//數(shù)據(jù)連接換碼 
  public static final byte EOT = 4;//傳輸結(jié)束 
  public static final byte ENQ = 5;//詢問字符 
  public static final byte SP = 32;//空格 
  public static final byte HT = 9;//橫向列表 
  public static final byte LF = 10;//打印并換行(水平定位) 
  public static final byte CR = 13;//歸位鍵 
  public static final byte FF = 12;//走紙控制(打印并回到標(biāo)準(zhǔn)模式(在頁模式下) ) 
  public static final byte CAN = 24;//作廢(頁模式下取消打印數(shù)據(jù) ) 
   
   
   
//------------------------打印機(jī)初始化----------------------------- 
   
   
  /** 
   * 打印機(jī)初始化 
   * @return 
   */ 
  public static byte[] init_printer() 
  { 
    byte[] result = new byte[2]; 
    result[0] = ESC; 
    result[1] = 64; 
    return result; 
  } 
   
   
//------------------------換行----------------------------- 
  
   
  /** 
   * 換行 
   * @param lineNum要換幾行 
   * @return 
   */ 
  public static byte[] nextLine(int lineNum) 
  { 
      byte[] result = new byte[lineNum]; 
      for(int i=0;i<lineNum;i++) 
      { 
        result[i] = LF; 
      } 
       
      return result; 
  } 
   
 
//------------------------下劃線-----------------------------   
   
   
  /** 
   * 繪制下劃線(1點(diǎn)寬) 
   * @return 
   */ 
  public static byte[] underlineWithOneDotWidthOn() 
  { 
      byte[] result = new byte[3]; 
    result[0] = ESC; 
    result[1] = 45; 
    result[2] = 1; 
    return result; 
  } 
   
   
  /** 
   * 繪制下劃線(2點(diǎn)寬) 
   * @return 
   */ 
  public static byte[] underlineWithTwoDotWidthOn() 
  { 
      byte[] result = new byte[3]; 
    result[0] = ESC; 
    result[1] = 45; 
    result[2] = 2; 
    return result; 
  } 
  /** 
   * 取消繪制下劃線 
   * @return 
   */ 
  public static byte[] underlineOff() 
  { 
      byte[] result = new byte[3]; 
    result[0] = ESC; 
    result[1] = 45; 
    result[2] = 0; 
    return result; 
  } 
 
   
//------------------------加粗----------------------------- 
  
   
  /** 
   * 選擇加粗模式 
   * @return 
   */ 
  public static byte[] boldOn() 
  { 
      byte[] result = new byte[3]; 
    result[0] = ESC; 
    result[1] = 69; 
    result[2] = 0xF; 
    return result; 
  } 
   
   
  /** 
   * 取消加粗模式 
   * @return 
   */ 
  public static byte[] boldOff() 
  { 
      byte[] result = new byte[3]; 
    result[0] = ESC; 
    result[1] = 69; 
    result[2] = 0; 
    return result; 
  } 
 
 
//------------------------對齊----------------------------- 
   
   
  /** 
   * 左對齊 
   * @return 
   */ 
  public static byte[] alignLeft() 
  { 
      byte[] result = new byte[3]; 
    result[0] = ESC; 
    result[1] = 97; 
    result[2] = 0; 
    return result; 
  } 
   
   
  /** 
   * 居中對齊 
   * @return 
   */ 
  public static byte[] alignCenter() 
  { 
      byte[] result = new byte[3]; 
    result[0] = ESC; 
    result[1] = 97; 
    result[2] = 1; 
    return result; 
  } 
   
   
  /** 
   * 右對齊 
   * @return 
   */ 
  public static byte[] alignRight() 
  { 
      byte[] result = new byte[3]; 
    result[0] = ESC; 
    result[1] = 97; 
    result[2] = 2; 
    return result; 
  } 
 
   
  /** 
   * 水平方向向右移動col列 
   * @param col 
   * @return 
   */ 
  public static byte[] set_HT_position( byte col ) 
  { 
    byte[] result = new byte[4]; 
    result[0] = ESC; 
    result[1] = 68; 
    result[2] = col; 
    result[3] = 0; 
    return result; 
  } 
//------------------------字體變大----------------------------- 
  
   
  /** 
   * 字體變大為標(biāo)準(zhǔn)的n倍 
   * @param num 
   * @return 
   */ 
  public static byte[] fontSizeSetBig(int num) 
  { 
      byte realSize = 0; 
      switch (num) 
      { 
      case 1: 
        realSize = 0;break; 
      case 2: 
        realSize = 17;break; 
      case 3: 
        realSize = 34;break; 
      case 4: 
        realSize = 51;break; 
      case 5: 
        realSize = 68;break; 
      case 6: 
        realSize = 85;break; 
      case 7: 
        realSize = 102;break; 
      case 8: 
        realSize = 119;break; 
      } 
      byte[] result = new byte[3]; 
      result[0] = 29; 
      result[1] = 33; 
      result[2] = realSize; 
      return result; 
  } 
 
   
//------------------------字體變小----------------------------- 
  
   
  /** 
   * 字體取消倍寬倍高 
   * @param num 
   * @return 
   */ 
  public static byte[] fontSizeSetSmall(int num) 
  { 
      byte[] result = new byte[3]; 
      result[0] = ESC; 
      result[1] = 33; 
     
    return result; 
  } 
 
 
//------------------------切紙-----------------------------   
  
   
  /** 
   * 進(jìn)紙并全部切割 
   * @return 
   */ 
  public static byte[] feedPaperCutAll() 
  { 
      byte[] result = new byte[4]; 
     result[0] = GS; 
     result[1] = 86; 
     result[2] = 65; 
     result[3] = 0; 
     return result; 
  } 
   
   
  /** 
   * 進(jìn)紙并切割(左邊留一點(diǎn)不切) 
   * @return 
   */ 
  public static byte[] feedPaperCutPartial() 
  { 
      byte[] result = new byte[4]; 
     result[0] = GS; 
     result[1] = 86; 
     result[2] = 66; 
     result[3] = 0; 
     return result; 
  } 
 
//------------------------切紙----------------------------- 
  public static byte[] byteMerger(byte[] byte_1, byte[] byte_2){  
    byte[] byte_3 = new byte[byte_1.length+byte_2.length];  
    System.arraycopy(byte_1, 0, byte_3, 0, byte_1.length);  
    System.arraycopy(byte_2, 0, byte_3, byte_1.length, byte_2.length);  
    return byte_3;  
  }  
   
   
  public static byte[] byteMerger(byte[][] byteList){  
     
      int length = 0; 
    for(int i=0;i<byteList.length;i++) 
    { 
        length += byteList[i].length; 
    } 
    byte[] result = new byte[length]; 
     
    int index = 0; 
    for(int i=0;i<byteList.length;i++) 
    { 
        byte[] nowByte = byteList[i]; 
        for(int k=0;k<byteList[i].length;k++) 
        { 
          result[index] = nowByte[k]; 
          index++; 
        } 
    } 
    return result;  
  }  
   
  
   
} 

4.在以上都完成之后,就可以把你需要的字符串轉(zhuǎn)換成byte數(shù)組并調(diào)用sendCommand方法來進(jìn)行打印了

@SuppressLint("NewApi") 
  public boolean sendCommand(byte[] Content) { 
    boolean Result; 
    synchronized (this) { 
      int len = -1; 
      if (mConnection != null) { 
        len = mConnection.bulkTransfer(mEndpointIntr, Content, Content.length, 10000); 
      } 
 
      if (len < 0) { 
        Result = false; 
        Log.i(TAG, "發(fā)送失?。?" + len); 
      } else { 
        Result = true; 
        Log.i(TAG, "發(fā)送" + len + "字節(jié)數(shù)據(jù)"); 
      } 
    } 
    return Result; 

復(fù)制代碼 代碼如下:

len = mConnection.bulkTransfer(mEndpointIntr, Content, Content.length, 10000); 

這一步僅僅加了同步鎖,并未開啟一個(gè)新的線程去處理,在本機(jī)上沒有問題,但上面的USB通信機(jī)制的文章有提到要放到異步線程,這里需要注意。

以上就是本文的全部內(nèi)容,希望對大家的學(xué)習(xí)有所幫助,也希望大家多多支持億速云。

向AI問一下細(xì)節(jié)

免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場,如果涉及侵權(quán)請聯(lián)系站長郵箱:is@yisu.com進(jìn)行舉報(bào),并提供相關(guān)證據(jù),一經(jīng)查實(shí),將立刻刪除涉嫌侵權(quán)內(nèi)容。

AI