IDTech Android SDK Guide  1.00.042
API reference for MiniSmart II
Sample Project Tutorial

Using Eclipse, we will create a sample project that will interface with the MiniSmartII and will perform the following activities:

  • Auto-Connect and display connection status
  • Get Device Firmware
  • Start/Cancel EMV Transaction
  • Show LCD Display for EMV transaction
  • Automatically select first AID or first Language if prompted

Listeners:

  • Listener to detect device connected
  • Listener to detect device disconnected
  • Listener to receive EMV tag data
  • Listener to receive LCD messages

Step 1: Create New Project

Create a new Android Application project in Eclipse as an Empty Activity

newproject72_.png

Step 2: Import IDTechSDK for MiniSmartII

Import the necessary libraries

Step 3: Design Interface

Design the User Interface by editing the main layout XML file
Open your layout and add items to so it contains the following buttons/fields (sample code provide at end of section):

  • Add a TextView to the top that will signify connection/disconnection status.
  • Add two TextViews to communicate data from the MiniSmartII and for EMV LCD display information. Remove the Editable behavior if you don't want the keyboard to pop up if you accidentally select it.
  • Add buttons to execute the following functions:
    • Get Firmware
    • Start ICC EMV
    • Cancel ICC EMV
layout.png

Step 4: Configure Activity File

In the activity file, perform the following:

Layout Source Code

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#aaaaaa"
android:orientation="vertical" >
<TextView
android:id="@+id/status_text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#000000"
android:gravity="center_vertical|center_horizontal"
android:text="MINISMARTII DISCONNECTED"
android:textColor="#FFFFFF" />
<LinearLayout
android:id="@+id/linearLayoutBottom2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<Button
android:id="@+id/btn_StartEMV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.53"
android:gravity="center_vertical|center_horizontal"
android:text="Start EMV" />
<Button
android:id="@+id/btn_CancelEMV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.53"
android:text="Cancel EMV" />
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayoutEditText"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#dddddd"
android:focusable="true"
android:focusableInTouchMode="true"
android:orientation="vertical" >
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="5dp"
android:background="#ffffff" >
<TextView
android:id="@+id/lcdLog"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text=""
android:textColor="#000000"
android:textSize="12sp"
android:typeface="monospace" >
</TextView>
</ScrollView>
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayoutEditText2"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#dddddd"
android:focusable="true"
android:focusableInTouchMode="true"
android:orientation="vertical" >
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="5dp"
android:background="#ffffff" >
<TextView
android:id="@+id/textLog"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text=""
android:textColor="#000000"
android:textSize="12sp"
android:typeface="monospace" >
</TextView>
</ScrollView>
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayoutBottom"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<Button
android:id="@+id/btn_getFirmware"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.53"
android:gravity="center_vertical|center_horizontal"
android:text="Get Firmware Version" />
</LinearLayout>
</LinearLayout>

Step 5: Configure Method File

In the activity file, perform the following:

// declaring the instance of the MiniSmartII;
private IDT_MiniSmartII myDevice = null;
private TextView connectStatusTextView;
private TextView textLog;
private TextView lcdLog;
private Button btnGetFirmware;
private Button btnStartEMV;
private Button btnCancelEMV;
private Handler handler = new Handler();
private boolean isReaderConnected = false;
private String info = "";
private String detail = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
handler = new Handler();
btnStartEMV = (Button)findViewById(R.id.btn_StartEMV);
btnCancelEMV = (Button)findViewById(R.id.btn_CancelEMV);
btnGetFirmware = (Button)findViewById(R.id.btn_getFirmware);
textLog = (TextView)findViewById(R.id.textLog);
lcdLog = (TextView)findViewById(R.id.lcdLog);
connectStatusTextView = (TextView)findViewById(R.id.status_text);
if(myDevice!=null){
myDevice.unregisterListen();
myDevice.release();
myDevice = null;
}
myDevice = new IDT_MiniSmartII(this,this);
myDevice.registerListen();
}
private Runnable doUpdateLabel = new Runnable()
{
public void run()
{
if(!isReaderConnected){
connectStatusTextView.setText("MiniSmartII DISCONNECTED");
}
else{
connectStatusTextView.setText("MiniSmartII CONNECTED");
}
}
};
@Override
public void deviceConnected() {
isReaderConnected = true;
handler.post(doUpdateLabel);
}
@Override
public void deviceDisconnected() {
isReaderConnected = false;
handler.post(doUpdateLabel);
}
  • Implement protocol delegate com.idtechproducts.device.OnReceiverListener.emvTransactionData() to report EMV transaction results
    private Runnable doUpdateStatus = new Runnable()
    {
    public void run()
    {
    lcdLog.setText(info);
    textLog.setText(detail);
    }
    };
    public void emvTransactionData(IDTEMVData emvData) {
    detail += Common.emvErrorCodes(emvData.result);
    detail += "\r\n";
    if (emvData.result == IDTEMVData.START_TRANS_SUCCESS)
    detail += "Start transaction response:\r\n";
    else if (emvData.result == IDTEMVData.GO_ONLINE)
    detail += "\r\nAuthentication response:\r\n";
    else
    detail += "\r\nComplete Transaction response:\r\n";
    if (!emvData.unencryptedTags.isEmpty())
    {
    detail += "Unencrypted Tags:\r\n";
    Set<String> keys = emvData.unencryptedTags.keySet();
    for(String key: keys){
    detail += key + ": ";
    byte[] data = emvData.unencryptedTags.get(key);
    detail += Common.getHexStringFromBytes(data) + "\r\n";
    }
    }
    if (!emvData.maskedTags.isEmpty())
    {
    detail += "Masked Tags:\r\n";
    Set<String> keys = emvData.maskedTags.keySet();
    for(String key: keys){
    detail += key + ": ";
    byte[] data = emvData.maskedTags.get(key);
    detail += Common.getHexStringFromBytes(data) + "\r\n";
    }
    }
    if (!emvData.encryptedTags.isEmpty())
    {
    detail += "Encrypted Tags:\r\n";
    Set<String> keys = emvData.encryptedTags.keySet();
    for(String key: keys){
    detail += key + ": ";
    byte[] data = emvData.encryptedTags.get(key);
    detail += Common.getHexStringFromBytes(data) + "\r\n";
    }
    }
    handler.post(doUpdateStatus);
    if (emvData.result == IDTEMVData.GO_ONLINE){
    //Auto Complete
    byte[] response = new byte[]{0x30,0x30};
    myDevice.emv_completeTransaction(false, response, null, null,null);
    }
    else if (emvData.result == IDTEMVData.START_TRANS_SUCCESS){
    //Auto Authenticate
    myDevice.emv_authenticateTransaction(null);
    }
    }
  • Implement protocol delegate com.idtechproducts.device.OnReceiverListener.emvTransactionData() to receive LCD messages, and automatically select 1st menu item/language when presented with choices. Normal operation would require a choice be made by card holder.
    public void lcdDisplay(int mode, String[] lines, int timeout) {
    if (mode == 0x01) //Menu Display
    {
    //automatically select 1st application
    myDevice.emv_lcdControlResponse((byte)mode, (byte)0x01);
    }
    else if (mode == 0x08) //Language Menu Display
    {
    //automatically select first language
    myDevice.emv_lcdControlResponse((byte)mode, (byte)0x01);
    }
    else{
    ResDataStruct toData = new ResDataStruct();
    info = lines[0];
    handler.post(doUpdateStatus);
    }
    }
  • Implement the button press methods
    btnGetFirmware.setOnClickListener(new Button.OnClickListener(){
    public void onClick(View v) {
    info = "Getting Firmware\n";
    detail = "";
    handler.post(doUpdateStatus);
    StringBuilder sb = new StringBuilder();
    int ret = myDevice.device_getFirmwareVersion(sb);
    if (ret == ErrorCode.SUCCESS) {
    info += "Firmware Version: " + sb.toString();
    detail = "";
    handler.post(doUpdateStatus);
    }
    else {
    info += "GetFirmwareVersion: Failed\n";
    info += "Status: "+ myDevice.device_getResponseCodeString(ret)+"";
    detail = "";
    handler.post(doUpdateStatus);
    }
    }
    });
    btnStartEMV.setOnClickListener(new Button.OnClickListener(){
    public void onClick(View v) {;
    detail = "";
    info = "Starting EMV Transaction\n";
    handler.post(doUpdateStatus);
    IDT_MiniSmartII.emv_allowFallback(true);
    myDevice.emv_startTransaction(1.00, 0.00, 0, 30, null, false);
    }
    });
    btnCancelEMV.setOnClickListener(new Button.OnClickListener(){
    public void onClick(View v) {
    detail = "";
    info = "Canceling EMV Transaction\n";
    handler.post(doUpdateStatus);
    ResDataStruct resData = new ResDataStruct();
    myDevice.emv_cancelTransaction(resData);
    }
    });

Complete code listing

package com.idtech.simpledemo;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Set;
import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity implements OnReceiverListener{
// declaring the instance of the MiniSmartII;
private IDT_MiniSmartII myDevice = null;
private TextView connectStatusTextView;
private TextView textLog;
private TextView lcdLog;
private Button btnGetFirmware;
private Button btnStartEMV;
private Button btnCancelEMV;
private Handler handler = new Handler();
private boolean isReaderConnected = false;
private String info = "";
private String detail = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
handler = new Handler();
btnStartEMV = (Button)findViewById(R.id.btn_StartEMV);
btnCancelEMV = (Button)findViewById(R.id.btn_CancelEMV);
btnGetFirmware = (Button)findViewById(R.id.btn_getFirmware);
textLog = (TextView)findViewById(R.id.textLog);
lcdLog = (TextView)findViewById(R.id.lcdLog);
connectStatusTextView = (TextView)findViewById(R.id.status_text);
if(myDevice!=null){
myDevice.unregisterListen();
myDevice.release();
myDevice = null;
}
myDevice = new IDT_MiniSmartII(this,this);
myDevice.registerListen();
btnGetFirmware.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v) {
info = "Getting Firmware\n";
detail = "";
handler.post(doUpdateStatus);
StringBuilder sb = new StringBuilder();
int ret = myDevice.device_getFirmwareVersion(sb);
if (ret == ErrorCode.SUCCESS) {
info += "Firmware Version: " + sb.toString();
detail = "";
handler.post(doUpdateStatus);
}
else {
info += "GetFirmwareVersion: Failed\n";
info += "Status: "+ myDevice.device_getResponseCodeString(ret)+"";
detail = "";
handler.post(doUpdateStatus);
}
}
});
btnStartEMV.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v) {;
detail = "";
info = "Starting EMV Transaction\n";
handler.post(doUpdateStatus);
IDT_MiniSmartII.emv_allowFallback(true);
myDevice.emv_startTransaction(1.00, 0.00, 0, 30, null, false);
}
});
btnCancelEMV.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v) {
detail = "";
info = "Canceling EMV Transaction\n";
handler.post(doUpdateStatus);
ResDataStruct resData = new ResDataStruct();
myDevice.emv_cancelTransaction(resData);
}
});
}
@Override
public void ICCNotifyInfo(byte[] arg0, String arg1) {
// TODO Auto-generated method stub
}
@Override
public void LoadXMLConfigFailureInfo(int arg0, String arg1) {
// TODO Auto-generated method stub
}
@Override
public void autoConfigCompleted(StructConfigParameters arg0) {
// TODO Auto-generated method stub
}
@Override
public void autoConfigProgress(int arg0) {
// TODO Auto-generated method stub
}
private Runnable doUpdateLabel = new Runnable()
{
public void run()
{
if(!isReaderConnected){
connectStatusTextView.setText("MINISMARTII DISCONNECTED");
}
else{
connectStatusTextView.setText("MINISMARTII CONNECTED");
}
}
};
@Override
public void deviceConnected() {
isReaderConnected = true;
handler.post(doUpdateLabel);
}
@Override
public void deviceDisconnected() {
isReaderConnected = false;
handler.post(doUpdateLabel);
}
@Override
public void emvTransactionData(IDTEMVData emvData) {
detail += Common.emvErrorCodes(emvData.result);
detail += "\r\n";
if (emvData.result == IDTEMVData.START_TRANS_SUCCESS)
detail += "Start transaction response:\r\n";
else if (emvData.result == IDTEMVData.GO_ONLINE)
detail += "\r\nAuthentication response:\r\n";
else
detail += "\r\nComplete Transaction response:\r\n";
if (!emvData.unencryptedTags.isEmpty())
{
detail += "Unencrypted Tags:\r\n";
Set<String> keys = emvData.unencryptedTags.keySet();
for(String key: keys){
detail += key + ": ";
byte[] data = emvData.unencryptedTags.get(key);
detail += Common.getHexStringFromBytes(data) + "\r\n";
}
}
if (!emvData.maskedTags.isEmpty())
{
detail += "Masked Tags:\r\n";
Set<String> keys = emvData.maskedTags.keySet();
for(String key: keys){
detail += key + ": ";
byte[] data = emvData.maskedTags.get(key);
detail += Common.getHexStringFromBytes(data) + "\r\n";
}
}
if (!emvData.encryptedTags.isEmpty())
{
detail += "Encrypted Tags:\r\n";
Set<String> keys = emvData.encryptedTags.keySet();
for(String key: keys){
detail += key + ": ";
byte[] data = emvData.encryptedTags.get(key);
detail += Common.getHexStringFromBytes(data) + "\r\n";
}
}
handler.post(doUpdateStatus);
if (emvData.result == IDTEMVData.GO_ONLINE){
//Auto Complete
byte[] response = new byte[]{0x30,0x30};
myDevice.emv_completeTransaction(false, response, null, null,null);
}
else if (emvData.result == IDTEMVData.START_TRANS_SUCCESS){
//Auto Authenticate
myDevice.emv_authenticateTransaction(null);
}
}
public void lcdDisplay(int mode, String[] lines, int timeout) {
if (mode == 0x01) //Menu Display
{
//automatically select 1st application
myDevice.emv_lcdControlResponse((byte)mode, (byte)0x01);
}
else if (mode == 0x08) //Language Menu Display
{
//automatically select first language
myDevice.emv_lcdControlResponse((byte)mode, (byte)0x01);
}
else{
ResDataStruct toData = new ResDataStruct();
info = lines[0];
handler.post(doUpdateStatus);
}
}
@Override
public void msgAudioVolumeAjustFailed() {
// TODO Auto-generated method stub
}
@Override
public void msgRKICompleted(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void msgToConnectDevice() {
// TODO Auto-generated method stub
}
private Runnable doUpdateStatus = new Runnable()
{
public void run()
{
lcdLog.setText(info);
textLog.setText(detail);
}
};
@Override
public void swipeMSRData(IDTMSRData card) {
}
@Override
public void timeout(int arg0) {
// TODO Auto-generated method stub
}
}