我正在尝试创建一个Android活动，该活动通过串行端口发送数据作为产品测试。我有一些用于执行此操作的代码，到目前为止，该代码在我的设备上找不到任何肯定具有串行端口的串行端口。我打算将此活动与设备串行端口上的回送连接器一起使用，以验证读取和写入功能。我已经尝试了以下两个程序：
import android.app.Activity;
import com.symbol.emdk.EMDKManager;
import com.symbol.emdk.EMDKManager.EMDKListener;
import com.symbol.emdk.EMDKManager.FEATURE_TYPE;
import com.symbol.emdk.EMDKResults;
import com.symbol.emdk.serialcomm.SerialComm;
import com.symbol.emdk.serialcomm.SerialCommException;
import com.symbol.emdk.serialcomm.SerialCommManager;
import com.symbol.emdk.serialcomm.SerialCommResults;
import com.symbol.emdk.serialcomm.SerialPortInfo;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import java.util.HashMap;
import java.util.List;
public class SerialTry3 extends Activity implements EMDKListener{
private String TAG = SerialTry3.class.getSimpleName();
private EMDKManager emdkManager = null;
private SerialComm serialCommPort = null;
private SerialCommManager serialCommManager = null;
private EditText txtDataToSend = null;
private TextView txtStatus = null;
private Button btnRead = null;
private Button btnWrite = null;
private Spinner spinnerPorts = null;
public HashMap<String, SerialPortInfo> supportedPorts = null;
@Override @SuppressWarnings("SetTextI18n")
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.serial_try);
txtDataToSend = (EditText) findViewById(R.id.txtDataToSend);
txtDataToSend.setText("Serial Communication Write Data Testing.");
spinnerPorts = (Spinner)findViewById(R.id.spinnerPorts);
btnWrite = (Button) findViewById(R.id.btnWrite);
btnRead = (Button) findViewById(R.id.btnRead);
txtStatus = (TextView) findViewById(R.id.statusView);
txtStatus.setText("");
txtStatus.requestFocus();
EMDKResults results = EMDKManager.getEMDKManager(getApplicationContext(), this);
if (results.statusCode != EMDKResults.STATUS_CODE.SUCCESS) {
new AsyncStatusUpdate().execute("EMDKManager object request failed!");
}
new AsyncUiControlUpdate().execute(false);
}
@Override
public void onOpened(EMDKManager emdkManager) {
this.emdkManager = emdkManager;
Log.d(TAG, "EMDK opened");
try{
serialCommManager = (SerialCommManager) this.emdkManager.getInstance(FEATURE_TYPE.SERIALCOMM_EX);
if(serialCommManager != null) {
populatePorts();
}
else
{
new AsyncStatusUpdate().execute(FEATURE_TYPE.SERIALCOMM_EX.toString() + " Feature not supported.");
}
}
catch(Exception e)
{
Log.d(TAG, e.getMessage());
new AsyncStatusUpdate().execute(e.getMessage());
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.splash_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onDestroy() {
super.onDestroy();
deinitSerialComm();
if (emdkManager != null) {
emdkManager.release();
emdkManager = null;
}
}
@Override
protected void onPause()
{
super.onPause();
deinitSerialComm();
serialCommManager = null;
supportedPorts = null;
// Release the serialComm manager resources
if (emdkManager != null) {
emdkManager.release(FEATURE_TYPE.SERIALCOMM_EX);
}
}
@Override
protected void onResume()
{
super.onResume();
// Acquire the serialComm manager resources
if (emdkManager != null) {
serialCommManager = (SerialCommManager) emdkManager.getInstance(FEATURE_TYPE.SERIALCOMM_EX);
if (serialCommManager != null) {
populatePorts();
if (supportedPorts != null)
initSerialComm();
}
}
}
void populatePorts()
{
try {
if(serialCommManager != null) {
List<SerialPortInfo> serialPorts = serialCommManager.getSupportedPorts();
if(serialPorts.size()>0) {
supportedPorts = new HashMap<String, SerialPortInfo> ();
String[] ports = new String[serialPorts.size()];
int count = 0;
for (SerialPortInfo info : serialPorts) {
supportedPorts.put(info.getFriendlyName(), info);
ports[count] = info.getFriendlyName();
count++;
}
spinnerPorts.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_dropdown_item, ports));
spinnerPorts.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
//Disabling previous serial port before getting the new one
deinitSerialComm();
initSerialComm();
}
@Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
});
}
else
{
new AsyncStatusUpdate().execute("Failed to get available ports");
Toast.makeText(this, "Failed to get available ports, serial communication may not be supported.", Toast.LENGTH_LONG).show();
finish();
}
}
else
{
new AsyncStatusUpdate().execute("SerialCommManager is null");
}
}
catch (Exception ex)
{
Log.d(TAG, ex.getMessage());
new AsyncStatusUpdate().execute(ex.getMessage());
}
}
void initSerialComm() {
new AsyncEnableSerialComm().execute(supportedPorts.get(spinnerPorts.getSelectedItem()));
}
@Override
public void onClosed() {
if(emdkManager != null) {
emdkManager.release();
}
new AsyncStatusUpdate().execute("EMDK closed unexpectedly! Please close and restart the application.");
}
public void btnReadOnClick(View arg)
{
new AsyncReadData().execute();
}
public void btnWriteOnClick(View arg)
{
new AsyncUiControlUpdate().execute(false);
try {
String writeData = txtDataToSend.getText().toString();
int bytesWritten = serialCommPort.write(writeData.getBytes(), writeData.getBytes().length);
new AsyncStatusUpdate().execute("Bytes written: "+ bytesWritten);
} catch (SerialCommException e) {
new AsyncStatusUpdate().execute("write: "+ e.getResult().getDescription());
}
catch (Exception e) {
new AsyncStatusUpdate().execute("write: "+ e.getMessage() + "\n");
}
new AsyncUiControlUpdate().execute(true);
}
void deinitSerialComm() {
if (serialCommPort != null) {
try {
serialCommPort.disable();
serialCommPort = null;
} catch (Exception ex) {
Log.d(TAG, "deinitSerialComm disable Exception: " + ex.getMessage());
}
}
}
@SuppressWarnings("StaticFieldLeak")
private class AsyncStatusUpdate extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
return params[0];
}
@Override
protected void onPostExecute(String result) {
txtStatus.setText(result);
}
}
@SuppressWarnings("StaticFieldLeak")
private class AsyncUiControlUpdate extends AsyncTask<Boolean, Void, Boolean> {
@Override
protected Boolean doInBackground(Boolean... arg0) {
return arg0[0];
}
@Override
protected void onPostExecute(Boolean bEnable) {
btnRead.setEnabled(bEnable);
btnWrite.setEnabled(bEnable);
txtDataToSend.setEnabled(bEnable);
spinnerPorts.setEnabled(bEnable);
}
}
@SuppressWarnings("StaticFieldLeak")
private class AsyncEnableSerialComm extends AsyncTask<SerialPortInfo, Void, SerialCommResults>
{
@Override
protected SerialCommResults doInBackground(SerialPortInfo... params) {
SerialCommResults returnvar = SerialCommResults.FAILURE;
try {
serialCommPort = serialCommManager.getPort(params[0]);
} catch (Exception ex) {
ex.printStackTrace();
}
if (serialCommPort != null) {
try {
serialCommPort.enable();
returnvar = SerialCommResults.SUCCESS;
} catch (SerialCommException e) {
Log.d(TAG, e.getMessage());
e.printStackTrace();
returnvar = e.getResult();
}
}
return returnvar;
}
@Override @SuppressWarnings("SetTextI18n")
protected void onPostExecute(SerialCommResults result) {
super.onPostExecute(result);
if (result == SerialCommResults.SUCCESS) {
new AsyncStatusUpdate().execute("Serial comm channel enabled: (" + spinnerPorts.getSelectedItem().toString() + ")");
txtDataToSend.setText("Serial Communication Write Data Testing " + spinnerPorts.getSelectedItem().toString() + ".");
new AsyncUiControlUpdate().execute(true);
} else {
new AsyncStatusUpdate().execute(result.getDescription());
new AsyncUiControlUpdate().execute(false);
}
}
}
@SuppressWarnings("StaticFieldLeak")
private class AsyncReadData extends AsyncTask<Void, Void, String>
{
@Override
protected void onPreExecute() {
super.onPreExecute();
new AsyncUiControlUpdate().execute(false);
new AsyncStatusUpdate().execute("Reading..");
}
@Override
protected String doInBackground(Void... params) {
String statusText = "";
try {
byte[] readBuffer = serialCommPort.read(10000); //Timeout after 10 seconds
if (readBuffer != null) {
String tempString = new String(readBuffer);
statusText = "Data Read:\n" + tempString;
} else {
statusText = "No Data Available";
}
} catch (SerialCommException e) {
statusText = "read:" + e.getResult().getDescription();
} catch (Exception e) {
statusText = "read:" + e.getMessage();
}
return statusText;
}
@Override
protected void onPostExecute(String statusText) {
super.onPostExecute(statusText);
new AsyncUiControlUpdate().execute(true);
new AsyncStatusUpdate().execute(statusText);
}
}
}
和
import android.app.Activity;
import com.symbol.emdk.EMDKManager;
import com.symbol.emdk.EMDKManager.FEATURE_TYPE;
import com.symbol.emdk.EMDKResults;
import com.symbol.emdk.serialcomm.SerialComm;
import com.symbol.emdk.serialcomm.SerialCommException;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import com.symbol.emdk.serialcomm.SerialCommManager;
import com.symbol.emdk.serialcomm.SerialPortInfo;
import java.util.List;
public class SerialTry extends Activity implements EMDKManager.EMDKListener {
private String TAG = SerialTry.class.getSimpleName();
private EMDKManager emdkManager = null;
private SerialComm serialComm = null;
private SerialCommManager serialCommMan = null;
private EditText editText = null;
private TextView statusView = null;
private Button readButton = null;
private Button writeButton = null;
@Override @SuppressWarnings("SetTextI18n")
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.serial_try);
editText = (EditText) findViewById(R.id.editText1);
editText.setText("Serial Communication Write Data Testing.");
statusView = (TextView) findViewById(R.id.statusView);
statusView.setText("");
statusView.requestFocus();
EMDKResults results = EMDKManager.getEMDKManager(getApplicationContext(), this);
if (results.statusCode != EMDKResults.STATUS_CODE.SUCCESS) {
statusView.setText("Failed to open EMDK");
} else {
statusView.setText("Opening EMDK...");
}
//
// Get the serialComm/port object by passing a SerialPortInfo object:
addReadButtonEvents();
writeButtonEvents();
setEnabled(false);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.splash_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onDestroy() {
super.onDestroy();
if (emdkManager != null) {
emdkManager.release();
emdkManager = null;
}
}
@Override
public void onOpened(EMDKManager emdkManager) {
this.emdkManager = emdkManager;
Log.d(TAG, "EMDK opened");
try{
serialCommMan = (SerialCommManager) this.emdkManager.getInstance(EMDKManager.FEATURE_TYPE.SERIALCOMM_EX);
List<SerialPortInfo> serialPorts = serialCommMan.getSupportedPorts();
serialComm = serialCommMan.getPort(serialPorts.get(0));
System.out.println("Supported Ports::::::" + serialPorts);
Thread readThread = new Thread(new Runnable() {
@Override
public void run() {
String statusText;
if (serialComm != null) {
try{
serialComm.enable();
statusText = "Serial comm channel enabled";
setEnabled(true);
} catch(SerialCommException e){
Log.d(TAG, e.getMessage());
e.printStackTrace();
statusText = e.getMessage();
setEnabled(false);
}
} else {
statusText = FEATURE_TYPE.SERIALCOMM_EX.toString() + " Feature not supported or initilization error.";
setEnabled(false);
}
displayMessage(statusText);
}
});
readThread.start();
}
catch(Exception e)
{
Log.d(TAG, e.getMessage());
e.printStackTrace();
displayMessage(e.getMessage());
}
}
@Override
public void onClosed() {
if(emdkManager != null) {
emdkManager.release();
}
displayMessage("EMDK closed abruptly.");
}
private void addReadButtonEvents() {
readButton = (Button) findViewById(R.id.btnRead);
readButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Thread readThread = new Thread(new Runnable() {
@Override
public void run() {
setEnabled(false);
String statusText;
try {
byte[] readBuffer = serialComm.read(10000); //Timeout after 10 seconds
if(readBuffer != null) {
String tempString = new String(readBuffer);
statusText = "Data Read:\n" + tempString;
} else {
statusText = "No Data Available";
}
}catch (SerialCommException e) {
statusText ="read:"+ e.getResult().getDescription();
e.printStackTrace();
}
catch (Exception e) {
statusText = "read:"+ e.getMessage();
e.printStackTrace();
}
setEnabled(true);
displayMessage(statusText);
}
});
readThread.start();
}
});
}
@SuppressWarnings("SetTextI18n")
private void writeButtonEvents() {
writeButton = (Button) findViewById(R.id.btnWrite);
writeButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
setEnabled(false);
try {
String writeData = editText.getText().toString();
int bytesWritten = serialComm.write(writeData.getBytes(), writeData.getBytes().length);
statusView.setText("Bytes written: "+ bytesWritten);
} catch (SerialCommException e) {
statusView.setText("write: "+ e.getResult().getDescription());
}
catch (Exception e) {
statusView.setText("write: "+ e.getMessage() + "\n");
}
setEnabled(true);
}
});
}
@SuppressWarnings("SetTextI18n")
void displayMessage(String message) {
final String tempMessage = message;
runOnUiThread(new Runnable() {
public void run() {
statusView.setText(tempMessage + "\n");
}
});
}
void setEnabled(boolean enableState) {
final boolean tempState = enableState;
runOnUiThread(new Runnable() {
public void run() {
readButton.setEnabled(tempState);
writeButton.setEnabled(tempState);
editText.setEnabled(tempState);
}
});
}
}
问题似乎出在我的代码上，还是我对设备本身不了解？任何帮助，将不胜感激。谢谢您的宝贵时间。