嗨即时通讯新手知识到我试图创建一个蓝牙应用程序来控制我的aruino RC，一旦我点击任意四个按钮我得到错误（检查服务器上是否存在spp uuid ）。我已经四处寻找解决方案，但它们似乎都不适合我，所以请你帮忙:)。
package com.example.omaradel.andromeda;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Method;
import java.util.UUID;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private static final String TAG = "Andromeda";
private BluetoothAdapter btAdapter = null;
private BluetoothSocket btSocket = null;
private OutputStream outStream = null;
// SPP UUID service
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
// MAC-address of Bluetooth module (you must edit this line)
private static String address = "64:5A:04:C9:8D:98";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// IntentFilter filter1 = new IntentFilter(BluetoothDevice.ACTION_ACL_CONNECTED);
// IntentFilter filter2 = new IntentFilter(BluetoothDevice.ACTION_ACL_DISCONNECT_REQUESTED);
// IntentFilter filter3 = new IntentFilter(BluetoothDevice.ACTION_ACL_DISCONNECTED);
// this.registerReceiver(mReceiver, filter1);
// this.registerReceiver(mReceiver, filter2);
// this.registerReceiver(mReceiver, filter3);
btAdapter = BluetoothAdapter.getDefaultAdapter();
checkBTState();
}
public void forward (View v){
sendData("2");
}
public void backward (View v){
sendData("3");
}
public void right (View v){
sendData("4");
}
public void left (View v){
sendData("5");
}
// The BroadcastReceiver that listens for bluetooth broadcasts
// private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
// @Override
// public void onReceive(Context context, Intent intent) {
// TextView connectionStatus = (TextView) findViewById(R.id.status);
// String action = intent.getAction();
//
// if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)) {
// //Do something if connected
// Toast.makeText(getApplicationContext(), "Bluetooth Connected", Toast.LENGTH_SHORT).show();
// connectionStatus.setText("connected");
// connectionStatus.setTextColor(Color.parseColor("#00ff2a"));
// connectionStatus.setBackgroundResource(R.drawable.connected);
// connectionStatus.setPadding(16, 16, 16, 16);
// } else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action)) {
// //Do something if disconnected
// Toast.makeText(getApplicationContext(), "Bluetooth Disconnected", Toast.LENGTH_SHORT).show();
// connectionStatus.setText("disconnected");
// connectionStatus.setTextColor(Color.parseColor("#ff3a4f"));
// connectionStatus.setBackgroundResource(R.drawable.disconnected);
// connectionStatus.setPadding(16, 16, 16, 16);
// }
// //else if...
// }
// };
private BluetoothSocket createBluetoothSocket(BluetoothDevice device) throws IOException {
if(Build.VERSION.SDK_INT >= 10){
try {
final Method m = device.getClass().getMethod("createInsecureRfcommSocketToServiceRecord", new Class[] { UUID.class });
return (BluetoothSocket) m.invoke(device, MY_UUID);
} catch (Exception e) {
Log.e(TAG, "Could not create Insecure RFComm Connection",e);
}
}
return device.createRfcommSocketToServiceRecord(MY_UUID);
}
@Override
public void onResume() {
super.onResume();
Log.d(TAG, "...onResume - try connect...");
// Set up a pointer to the remote node using it's address.
BluetoothDevice device = btAdapter.getRemoteDevice(address);
// Two things are needed to make a connection:
// A MAC address, which we got above.
// A Service ID or UUID. In this case we are using the
// UUID for SPP.
try {
btSocket = createBluetoothSocket(device);
} catch (IOException e1) {
errorExit("Fatal Error", "In onResume() and socket create failed: " + e1.getMessage() + ".");
}
// Discovery is resource intensive. Make sure it isn't going on
// when you attempt to connect and pass your message.
btAdapter.cancelDiscovery();
// Establish the connection. This will block until it connects.
Log.d(TAG, "...Connecting...");
try {
btSocket.connect();
Log.d(TAG, "...Connection ok...");
} catch (IOException e) {
try {
btSocket.close();
} catch (IOException e2) {
errorExit("Fatal Error", "In onResume() and unable to close socket during connection failure" + e2.getMessage() + ".");
}
}
// Create a data stream so we can talk to server.
Log.d(TAG, "...Create Socket...");
try {
outStream = btSocket.getOutputStream();
} catch (IOException e) {
errorExit("Fatal Error", "In onResume() and output stream creation failed:" + e.getMessage() + ".");
}
}
@Override
public void onPause() {
super.onPause();
Log.d(TAG, "...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 {
btSocket.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(btAdapter==null) {
errorExit("Fatal Error", "Bluetooth not support");
} else {
if (btAdapter.isEnabled()) {
Log.d(TAG, "...Bluetooth ON...");
} else {
//Prompt user to turn on Bluetooth
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, 1);
}
}
}
private void errorExit(String title, String message){
Toast.makeText(getBaseContext(), title + " - " + message, Toast.LENGTH_LONG).show();
finish();
}
private void sendData(String message) {
byte[] msgBuffer = message.getBytes();
Log.d(TAG, "...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);
}
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:clickable="false"
android:background="@drawable/greenbackground">
<TextView
android:layout_width="wrap_content"
android:id="@+id/status"
android:layout_height="wrap_content"
android:text="Disconnected"
android:textSize="18sp"
android:textAllCaps="true"
android:layout_margin="16dp"
android:padding="16dp"
android:textStyle="bold"
android:textColor="#ff3a4f"
android:background="@drawable/disconnected"/>
<TextView
android:layout_width="wrap_content"
android:layout_centerHorizontal="true"
android:layout_height="wrap_content"
android:text="0 cm/s"
android:textSize="24sp"
android:textColor="#ff0000"
android:padding="8dp"
android:layout_alignParentTop="true"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="80dp"
android:id="@+id/left2"
android:background="@drawable/left"
android:layout_alignParentBottom="true"
android:layout_marginLeft="24dp"
android:layout_marginBottom="40dp"
android:onClick="left"/>
<Button
android:layout_width="wrap_content"
android:layout_height="80dp"
android:id="@+id/right"
android:background="@drawable/right"
android:layout_alignParentBottom="true"
android:layout_marginBottom="40dp"
android:layout_toRightOf="@id/left2"
android:layout_marginLeft="24dp"
android:onClick="right"
/>
<Button
android:layout_width="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_marginBottom="40dp"
android:layout_height="80dp"
android:layout_marginRight="32dp"
android:id="@+id/backward"
android:background="@drawable/down"
android:onClick="backward"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="80dp"
android:id="@+id/forward"
android:background="@drawable/up"
android:layout_alignParentRight="true"
android:layout_marginRight="32dp"
android:layout_above="@id/backward"
android:layout_marginBottom="22dp"
android:onClick="forward"
/>
</RelativeLayout>