我正在使用magtek读卡器音频uDynamo设备，我正在将sdk与我的Android应用程序集成。但是当我试图通过openDevice（）方法打开设备时。申请不幸停止了。为什么这样做？
这就是我在做的事情
m_SCRA.setConnectionType(MTConnectionType.Audio);
m_SCRA.setAddress(m_deviceAddress);
m_connectionState = MTConnectionState.Connected;
// here its stopping
m_SCRA.openDevice();
完整的源代码
public class MainActivity extends AppCompatActivity {
private MTSCRA m_SCRA;
private Button btn;
private TextView txt;
private TextView txt1;
private TextView msg;
private TextView msg2;
private boolean m_startTransactionActionPending;
private boolean m_turnOffLEDPending;
private EditText Edit;
private AudioManager m_audioManager;
private int m_audioVolume;
private String m_deviceAddress;
private MTConnectionType m_connectionType;
private MTConnectionState m_connectionState = MTConnectionState.Disconnected;
private Handler m_scraHandler = new Handler(new SCRAHandlerCallback());
private class SCRAHandlerCallback implements Handler.Callback {
public boolean handleMessage(Message msg)
{
try
{
android.app.AlertDialog alertDialog = new android.app.AlertDialog.Builder(MainActivity.this).create();
alertDialog.setTitle("Alert");
alertDialog.setMessage("Alert Switch");
alertDialog.setButton(android.app.AlertDialog.BUTTON_NEUTRAL, "OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alertDialog.show();
switch (msg.what)
{
case MTSCRAEvent.OnDeviceConnectionStateChanged:
OnDeviceStateChanged((MTConnectionState) msg.obj);
break;
case MTSCRAEvent.OnCardDataStateChanged:
OnCardDataStateChanged((MTCardDataState) msg.obj);
break;
case MTSCRAEvent.OnDataReceived:
OnCardDataReceived((IMTCardData) msg.obj);
break;
case MTSCRAEvent.OnDeviceResponse:
OnDeviceResponse((String) msg.obj);
break;
case MTEMVEvent.OnTransactionStatus:
OnTransactionStatus((byte[]) msg.obj);
break;
case MTEMVEvent.OnDisplayMessageRequest:
OnDisplayMessageRequest((byte[]) msg.obj);
break;
case MTEMVEvent.OnUserSelectionRequest:
OnUserSelectionRequest((byte[]) msg.obj);
break;
case MTEMVEvent.OnARQCReceived:
OnARQCReceived((byte[]) msg.obj);
break;
case MTEMVEvent.OnTransactionResult:
OnTransactionResult((byte[]) msg.obj);
break;
case MTEMVEvent.OnEMVCommandResult:
OnEMVCommandResult((byte[]) msg.obj);
break;
case MTEMVEvent.OnDeviceExtendedResponse:
OnDeviceExtendedResponse((String) msg.obj);
break;
}
}
catch (Exception ex)
{
}
return true;
}
}
public void OnCardDataReceived(IMTCardData cardData)
{
txt.setText(m_SCRA.getCardLast4());
}
protected void OnDeviceStateChanged(MTConnectionState deviceState)
{
setState(deviceState);
updateDisplay();
invalidateOptionsMenu();
android.app.AlertDialog alertDialog = new android.app.AlertDialog.Builder(MainActivity.this).create();
alertDialog.setTitle("Alert");
alertDialog.setMessage("Alert ondevice state");
alertDialog.setButton(android.app.AlertDialog.BUTTON_NEUTRAL, "OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alertDialog.show();
switch (deviceState)
{
case Disconnected:
if (m_connectionType == MTConnectionType.Audio)
{
restoreVolume();
}
break;
case Connected:
if (m_connectionType == MTConnectionType.Audio)
{
setVolumeToMax();
}
clearMessage();
clearMessage2();
break;
case Error:
sendToDisplay("[Device State Error]");
break;
case Connecting:
break;
case Disconnecting:
break;
}
}
protected void OnCardDataStateChanged(MTCardDataState cardDataState)
{
switch (cardDataState)
{
case DataNotReady:
sendToDisplay("[Card Data Not Ready]");
break;
case DataReady:
sendToDisplay("[Card Data Ready]");
break;
case DataError:
sendToDisplay("[Card Data Error]");
break;
}
}
protected void OnDeviceResponse(String data)
{
sendToDisplay("[Device Response]");
sendToDisplay(data);
if (m_startTransactionActionPending)
{
m_startTransactionActionPending = false;
startTransaction();
}
}
protected void OnTransactionStatus(byte[] data)
{
sendToDisplay("[Transaction Status]");
//sendToDisplay(TLVParser.getHexString(data));
}
protected void OnDisplayMessageRequest(byte[] data)
{
sendToDisplay("[Display Message Request]");
//String message = TLVParser.getTextString(data, 0);
//sendToDisplay(message);
//displayMessage(message);
}
protected void OnEMVCommandResult(byte[] data)
{
sendToDisplay("[EMV Command Result]");
//sendToDisplay(TLVParser.getHexString(data));
if (m_turnOffLEDPending)
{
m_turnOffLEDPending = false;
setLED(false);
}
}
protected void OnDeviceExtendedResponse(String data)
{
sendToDisplay("[Device Extended Response]");
sendToDisplay(data);
}
protected void OnUserSelectionRequest(byte[] data)
{
sendToDisplay("[User Selection Request]");
//sendToDisplay(TLVParser.getHexString(data));
//processSelectionRequest(data);
}
protected void OnARQCReceived(byte[] data)
{
sendToDisplay("[ARQC Received]");
/*sendToDisplay(TLVParser.getHexString(data));
List<HashMap<String, String>> parsedTLVList = TLVParser.parseEMVData(data, true, "");
if (parsedTLVList != null)
{
String deviceSNString = TLVParser.getTagValue(parsedTLVList, "DFDF25");
byte[] deviceSN = TLVParser.getByteArrayFromHexString(deviceSNString);
sendToDisplay("SN Bytes=" + deviceSNString);
sendToDisplay("SN String=" + TLVParser.getTextString(deviceSN, 2));
boolean approved = true;
if (mMainMenu != null)
{
approved = mMainMenu.findItem(R.id.menu_emv_approved).isChecked();
}
byte[] response = buildAcquirerResponse(deviceSN, approved);
setAcquirerResponse(response);
}*/
}
protected void OnTransactionResult(byte[] data)
{
sendToDisplay("[Transaction Result]");
//sendToDisplay(TLVParser.getHexString(data));
/*if (data != null)
{
if (data.length > 0)
{
boolean signatureRequired = (data[0] != 0);
int lenBatchData = data.length - 3;
if (lenBatchData > 0)
{
byte[] batchData = new byte[lenBatchData];
System.arraycopy(data, 3, batchData, 0, lenBatchData);
sendToDisplay("(Parsed Batch Data)");
List<HashMap<String, String>> parsedTLVList = TLVParser.parseEMVData(batchData, false, "");
displayParsedTLV(parsedTLVList);
String cidString = TLVParser.getTagValue(parsedTLVList, "9F27");
byte[] cidValue = TLVParser.getByteArrayFromHexString(cidString);
boolean approved = false;
if (cidValue != null)
{
if (cidValue.length > 0)
{
if ((cidValue[0] & (byte) 0x40) != 0)
{
approved = true;
}
}
}
if (approved)
{
if (signatureRequired)
{
displayMessage2("( Signature Required )");
}
else
{
displayMessage2("( No Signature Required )");
}
}
}
}
}
setLED(false);*/
}
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = ( Button) findViewById(R.id.btn);
txt = (TextView) findViewById(R.id.txt1);
txt1 = (TextView) findViewById(R.id.txt2);
msg = (TextView) findViewById(R.id.msgtext1);
msg2 = (TextView) findViewById(R.id.msgtext2);
Edit = (EditText) findViewById(R.id.editText);
//m_SCRA.setConnectionType(MTConnectionType.Audio);
//if (! m_SCRA.isDeviceConnected())
//{
// m_SCRA.openDevice();
//}
m_audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
m_SCRA = new MTSCRA(this, m_scraHandler);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
m_connectionType = MTConnectionType.Audio;
m_SCRA.setConnectionType(MTConnectionType.Audio);
m_SCRA.setAddress(m_deviceAddress);
m_connectionState = MTConnectionState.Connected;
m_SCRA.openDevice();
}
});
}
private void sendToDisplay(final String data)
{
if (data != null)
{
runOnUiThread(new Runnable()
{
@Override
public void run()
{
Edit.append(data + "\n");
}
});
}
}
private void setState(MTConnectionState deviceState)
{
m_connectionState = deviceState;
updateDisplay();
invalidateOptionsMenu();
}
private void updateDisplay()
{
runOnUiThread(new Runnable()
{
@Override
public void run()
{
if (m_connectionState == MTConnectionState.Connected)
{
updateConnectionState(R.string.connected);
}
else if (m_connectionState == MTConnectionState.Connecting)
{
updateConnectionState(R.string.connecting);
}
else if (m_connectionState == MTConnectionState.Disconnecting)
{
updateConnectionState(R.string.disconnecting);
}
else if (m_connectionState == MTConnectionState.Disconnected)
{
updateConnectionState(R.string.disconnected);
}
}
});
}
private void updateConnectionState(final int resourceId)
{
runOnUiThread(new Runnable()
{
@Override
public void run()
{
txt1.setText(resourceId);
}
});
}
private void restoreVolume()
{
setVolume(m_audioVolume);
}
private void setVolumeToMax()
{
saveVolume();
android.app.AlertDialog alertDialog = new android.app.AlertDialog.Builder(MainActivity.this).create();
alertDialog.setTitle("Alert");
alertDialog.setMessage("Alert volume max");
alertDialog.setButton(android.app.AlertDialog.BUTTON_NEUTRAL, "OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alertDialog.show();
int volume = m_audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
setVolume(volume);
}
private void setVolume(int volume)
{
m_audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, volume, AudioManager.FLAG_SHOW_UI);
}
private void saveVolume()
{
m_audioVolume = m_audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
}
private void clearMessage()
{
runOnUiThread(new Runnable()
{
@Override
public void run()
{
msg.setText("");
}
});
}
private void clearMessage2()
{
runOnUiThread(new Runnable()
{
@Override
public void run()
{
msg2.setText("");
}
});
}
public void startTransaction()
{
if (m_SCRA != null)
{
byte timeLimit = 0x3C;
//byte cardType = 0x02; // Chip Only
byte cardType = 0x03; // MSR + Chip
byte option = 0x00;
byte[] amount = new byte[] {0x00, 0x00, 0x00, 0x00, 0x15, 0x00};
byte transactionType = 0x00; // Purchase
byte[] cashBack = new byte[] {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
byte[] currencyCode = new byte[] { 0x08, 0x40};
byte reportingOption = 0x02; // All Status Changes
clearMessage();
clearMessage2();
int result = m_SCRA.startTransaction(timeLimit, cardType, option, amount, transactionType, cashBack, currencyCode, reportingOption);
sendToDisplay("[Start Transaction] (Result=" + result + ")");
}
}
public void setLED(boolean on)
{
if (m_SCRA != null)
{
if (on)
{
m_SCRA.sendCommandToDevice(MTDeviceConstants.SCRA_DEVICE_COMMAND_STRING_SET_LED_ON);
}
else
{
m_SCRA.sendCommandToDevice(MTDeviceConstants.SCRA_DEVICE_COMMAND_STRING_SET_LED_OFF);
}
}
} }
我面临同样的问题。原来，我忘记了录音运行时权限。
private void checkRecordPermission() {
if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.RECORD_AUDIO)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(getActivity(), new String[]{Manifest.permission.RECORD_AUDIO},
123);
}
}