Simple Thermal Printer

Android Library Based ESC/POS Thermal Printer

Based : ESC/POS Thermal Printer

Table of Content

1. Installition
2. Print Builder
3. Bluetooth
4. USB

Installation

Step 1. Add the JitPack repository to your build file. Add it in your root /build.gradle at the end of repositories:

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}

Step 2. Add the dependency in /app/build.gradle :

dependencies {
    ...
    implementation 'com.github.novandikp:SimpleThermalPrinter:v1.1'
}

Print Builder

In making a receipt or other required several formats. With this library you can create easily.

Class PrintTextBuilder

Step 1. Initialize Class

PrintTextBuilder resultPrint = new PrintTextBuilder();

Step 2. Add Text

resultPrint.addTitle("Faktur Penjualan");
resultPrint.addDivider();
resultPrint.addTextPair("Pelanggan","Novandi Kevin Pratama");
resultPrint.addTextPair("Faktur","000001");
resultPrint.addDivider();
    for (int i = 0; i < 3; i++) {
        ColumnPrinter columnNama = new ColumnPrinter("Baju Korea Keren");
        ColumnPrinter columnSubHarga = new ColumnPrinter("12.000", AlignColumn.RIGHT);
        resultPrint.addColumn(columnNama, columnSubHarga);
        resultPrint.addText("x2");
        resultPrint.addEnter();
    }
resultPrint.addDivider();
resultPrint.addTextPair("Total","40.000", AlignColumn.RIGHT);

We can add Title, Text, Text Pair, Divider, and Table with method of PrintTextBuilder

Bluetooth

Bluetooth permission

Be sure your project has permission in AndroidManifest.xml

1. android.permission.BLUETOOTH
2. android.permission.BLUETOOTH_ADMIN
3. android.permission.BLUETOOTH_CONNECT
4. android.permission.BLUETOOTH_SCAN
5. android.permission.ACCESS_COARSE_LOCATION
6. android.permission.ACCESS_FINE_LOCATION

This sample code for requsting permission

AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.printertesting">
    <uses-permission android:name="android.permission.BLUETOOTH" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
   <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
    <uses-feature android:name="android.hardware.bluetooth" android:required="false" />
    <uses-feature android:name="android.hardware.bluetooth_le" android:required="false" />

Request Permission

 if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, FINE_LOCATION);
}else if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, COARSE_LOCATION);
}else if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.BLUETOOTH}, PERMISSION_BLUETOOTH);
} else if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_ADMIN) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.BLUETOOTH_ADMIN}, PERMISSION_BLUETOOTH_ADMIN);
} else if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.S && ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.BLUETOOTH_CONNECT}, PERMISSION_BLUETOOTH_CONNECT);
} else if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.S && ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_SCAN) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.BLUETOOTH_SCAN}, PERMISSION_BLUETOOTH_SCAN);
} else {
        // Code
}

Initialize Bluetooth Printer Class

PrinterBTContext printerBTContext = PrinterBTContext.getInstance(this, resultPrint);

To initialize need parameter Context and PrintTextBuilder

Scan Bluetooth

printerBTContext.discoveryDevice(new PrinterBTContext.OnScanDevice() {
    @Override
    public void onScanStart() {
        //  Code when start example loading dialog showing
    }

    @Override
    public void onScanCompleted(List<DeviceBT> devices) {
        //  Code when scan is complete example close loading dialog
    }
});

Get Bluetooth Printer

printerBTContext.getListBluetoothDevice()

getListBluetoothDevice() will return List<DeviceBT>

DeviceBT has 3 property :

1. String name
2. String address
3. BluetoothConnection connection

Connect Printer

printerBTContext.connectDevice(deviceBT,new PrinterBTContext.OnConnect() {
    @Override
    public void onConnect(State_Bluetooth state_bt) {
        // Code

    }
});

DeviceBT is required parameter for connect printer can get from getListBluetoothDevice().

State_Bluetooth is enum

• NONE
• CONNECTED
• PAIRED
• BOUNDING
• ERROR_BOUNDED
• NOTCONNECTED

Another Function of PrinterBTContext

1. getDeviceName()

   Return Device Name Connected

2. print()

   For Print Text

3. isEnabled()

   Return is Bluetooth Enabled or Disabled

4. isConnectedDevice()

   Return is device connected

USB

Initialize Class

PrinterUSBContext printerUSBContext  = PrinterUSBContext.getInstance(this, resultPrint);;

To initialize need Context and PrintTextBuilder

Print

printerUSBContext.print();

Important

Always call removeReceiver() onDestroy

@Override
protected void onDestroy() {
    super.onDestroy();
    printerUSBContext.removeReceiver();
}

Size Paper

For Default all printer set 58mm, to set another size you can set with function setTypePrinter

Example

printerBTContext.setTypePrinter(Printer58mm.device());
printerUSBContext.setTypePrinter(Printer76mm.device());

To make custom size you can make like this

public class PrinterA5 implements TypePrinter
{
    public static PrinterA5 printerA5;

    public static PrinterA5 device(){
        if(PrinterA5.printerA5 == null){
            PrinterA5.printerA5 = new PrinterA5();
        }
        return  PrinterA5.printerA5;
    }

    @Override
    public float getPrinterWidth() {
        return 160f;
    }

    @Override
    public int getPrinterDPI() {
        return 231;
    }

    @Override
    public int getMaxCharColumns() {
        return 50;
    }
}

So you can call your custom size simply

printerUSBContext.setTypePrinter(PrinterA5.device());