这是我的蓝牙和Android应用程序之间的通信代码。该应用程序应该获取获取UUID和蓝牙地址。如果蓝牙地址和UUID无效，它将抛出异常。应用程序显示错误，说我尝试调试时UUID无效。我不知道如何解决它。
import android.app.Activity;
import android.nfc.Tag;
import android.os.Build;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Method;
import java.util.UUID;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
import com.iastate.nachoparty.rcpiapp.R;
public class MainActivity1 extends Activity {
protected static final String label = "bluetooth1";
Button buttonOn, buttonOff;
protected static BluetoothAdapter bluetoothAdapter = null;
protected static BluetoothSocket bluetoothSocket = null;
protected static OutputStream outstream = null;
// SPP UUID service
private static final UUID MY_UUID = UUID.fromString("00001101-0000-8000-00805F9B34FB");
//MAC address of bluetooth
protected static String address = "00:02:72:cd:9f:60 ";//to be updated
/* Called when the activity is first created */
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_full_screen);
buttonOn = (Button) findViewById(R.id.button_go);
buttonOff = (Button) findViewById(R.id.button_stop);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
//checkBTState();
/*
buttonOn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
sendData("1");
Toast.makeText(getBaseContext(), "Turn on LED", Toast.LENGTH_SHORT).show();
}
});
buttonOff.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
sendData("0");
Toast.makeText(getBaseContext(), "Turn off LED", Toast.LENGTH_SHORT).show();
}
});
*/
}
private BluetoothSocket createBluetoothSocket(BluetoothDevice device) throws IOException {
if (Build.VERSION.SDK_INT >= 10) {
try {
final Method m = device.getClass().getMethod("createInsecureRfcommSocketToServiceRecord");
// return (BluetoothSocket) m.invoke(device, MY_UUID);
} catch (Exception e) {
Log.e(label, "Could not create Insecure RFComm Connection", e);
}
}
//return device.createRfcommSocketToServiceRecord(MY_UUID);
return null;
}
public void onResume() {
super.onResume();
Log.d(label, "....onResume-try connect.....");
BluetoothDevice device = bluetoothAdapter.getRemoteDevice(address);
try {
bluetoothSocket = createBluetoothSocket(device);
} catch (IOException e1) {
errorExit("Fatal Error","In onResume() and socket create failed:"+e1.getMessage());
}
bluetoothAdapter.cancelDiscovery();
Log.d(label, "...Connecting.....");
try {
bluetoothSocket.connect();
Log.d(label, "...Connection ok...");
} catch (IOException e) {
try {
bluetoothSocket.close();
} catch (IOException e2) {
errorExit("Fatal Error", "In onResume() and unable to close socket during connection failure" + e2.getMessage() + ".");
}
}
Log.d(label, "...Create Socket...");
try {
outstream = bluetoothSocket.getOutputStream();
} catch (IOException e) {
errorExit("Fatal Error", "In onResume() and output stream creation failed:" + e.getMessage() + ".");
}
}
public void onPause() {
super.onPause();
Log.d(label, "...In onPause()...");
if (outstream != null) {
try {
outstream.flush();
} catch (IOException e) {
errorExit("Fatal Error", "In onPause() and failed to flush output stream: " + e.getMessage() + ".");
}
}
try {
bluetoothSocket.close();
} catch (IOException e2) {
errorExit("Fatal Error", "In onPause() and failed to close socket." + e2.getMessage() + ".");
}
}
private void checkBTState() {
// Check for Bluetooth support and then check to make sure it is turned on
// Emulator doesn't support Bluetooth and will return null
if(bluetoothAdapter==null) {
errorExit("Fatal Error", "Bluetooth not support");
} else {
if (bluetoothAdapter.isEnabled()) {
Log.d(label, "...Bluetooth ON...");
} else {
//Prompt user to turn on Bluetooth
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, 1);
}
}
}
protected void errorExit(String title, String message){
Toast.makeText(getBaseContext(), title + " - " + message, Toast.LENGTH_LONG).show();
finish();
}
protected void sendData(String message) {
byte[] msgBuffer = message.getBytes();
Log.d(label, "...Send data: " + message + "...");
try {
outstream.write(msgBuffer);
} catch (IOException e) {
String msg = "In onResume() and an exception occurred during write: " + e.getMessage();
if (address.equals("00:00:00:00:00:00"))
msg = msg + ".\n\nUpdate your server address from 00:00:00:00:00:00 to the correct address on line 35 in the java code";
//msg = msg + ".\n\nCheck that the SPP UUID: " + MY_UUID.toString() + " exists on server.\n\n";
errorExit("Fatal Error", msg);
}
}
}
import android.app.Activity;
import android.nfc.Tag;
import android.os.Build;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Method;
import java.util.UUID;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
import com.iastate.nachoparty.rcpiapp.R;
public class MainActivity1 extends Activity {
protected static final String label = "bluetooth1";
Button buttonOn, buttonOff;
protected static BluetoothAdapter bluetoothAdapter = null;
protected static BluetoothSocket bluetoothSocket = null;
protected static OutputStream outstream = null;
// SPP UUID service
//private static final UUID MY_UUID = UUID.fromString("00001101-0000-8000-00805F9B34FB");
//MAC address of bluetooth
protected static String address = "00:02:72:cd:9f:60 ";//to be updated
/* Called when the activity is first created */
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_full_screen);
buttonOn = (Button) findViewById(R.id.button_go);
buttonOff = (Button) findViewById(R.id.button_stop);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
//checkBTState();
/*
buttonOn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
sendData("1");
Toast.makeText(getBaseContext(), "Turn on LED", Toast.LENGTH_SHORT).show();
}
});
buttonOff.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
sendData("0");
Toast.makeText(getBaseContext(), "Turn off LED", Toast.LENGTH_SHORT).show();
}
});
*/
}
private BluetoothSocket createBluetoothSocket(BluetoothDevice device) throws IOException {
if (Build.VERSION.SDK_INT >= 10) {
try {
final Method m = device.getClass().getMethod("createInsecureRfcommSocketToServiceRecord");
// return (BluetoothSocket) m.invoke(device, MY_UUID);
} catch (Exception e) {
Log.e(label, "Could not create Insecure RFComm Connection", e);
}
}
//return device.createRfcommSocketToServiceRecord(MY_UUID);
return null;
}
public void onResume() {
super.onResume();
Log.d(label, "....onResume-try connect.....");
BluetoothDevice device = bluetoothAdapter.getRemoteDevice(address);
try {
bluetoothSocket = createBluetoothSocket(device);
} catch (IOException e1) {
errorExit("Fatal Error","In onResume() and socket create failed:"+e1.getMessage());
}
bluetoothAdapter.cancelDiscovery();
Log.d(label, "...Connecting.....");
try {
bluetoothSocket.connect();
Log.d(label, "...Connection ok...");
} catch (IOException e) {
try {
bluetoothSocket.close();
} catch (IOException e2) {
errorExit("Fatal Error", "In onResume() and unable to close socket during connection failure" + e2.getMessage() + ".");
}
}
Log.d(label, "...Create Socket...");
try {
outstream = bluetoothSocket.getOutputStream();
} catch (IOException e) {
errorExit("Fatal Error", "In onResume() and output stream creation failed:" + e.getMessage() + ".");
}
}
public void onPause() {
super.onPause();
Log.d(label, "...In onPause()...");
if (outstream != null) {
try {
outstream.flush();
} catch (IOException e) {
errorExit("Fatal Error", "In onPause() and failed to flush output stream: " + e.getMessage() + ".");
}
}
try {
bluetoothSocket.close();
} catch (IOException e2) {
errorExit("Fatal Error", "In onPause() and failed to close socket." + e2.getMessage() + ".");
}
}
private void checkBTState() {
// Check for Bluetooth support and then check to make sure it is turned on
// Emulator doesn't support Bluetooth and will return null
if(bluetoothAdapter==null) {
errorExit("Fatal Error", "Bluetooth not support");
} else {
if (bluetoothAdapter.isEnabled()) {
Log.d(label, "...Bluetooth ON...");
} else {
//Prompt user to turn on Bluetooth
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, 1);
}
}
}
protected void errorExit(String title, String message){
Toast.makeText(getBaseContext(), title + " - " + message, Toast.LENGTH_LONG).show();
finish();
}
protected void sendData(String message) {
byte[] msgBuffer = message.getBytes();
Log.d(label, "...Send data: " + message + "...");
try {
outstream.write(msgBuffer);
} catch (IOException e) {
String msg = "In onResume() and an exception occurred during write: " + e.getMessage();
if (address.equals("00:00:00:00:00:00"))
msg = msg + ".\n\nUpdate your server address from 00:00:00:00:00:00 to the correct address on line 35 in the java code";
//msg = msg + ".\n\nCheck that the SPP UUID: " + MY_UUID.toString() + " exists on server.\n\n";
errorExit("Fatal Error", msg);
}
}