我正在为一个连接到我的arduino微控制器的LED创建一个打开和关闭app控制器。除了底部，无论是ON还是OFF，Everythings似乎都没问题。它可以工作但只能点击一次。我已经阅读了一些与我的问题有关的论坛，其中一个说我从某些语句中删除了静态，但我无法将其删除，因为那时会出现错误。
以下是我的MainActivity.java中的一些代码：
//@@@@@@@@@@for the controller
btn_d1_on = (Button) findViewById(R.id.device1_on);
btn_d1_off = (Button) findViewById(R.id.device1_off);
//@@@@@@@@@@for the controller
btn_d1_on.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
//sendData("1");
//Toast msg = Toast.makeText(getBaseContext(), "The device is now On", Toast.LENGTH_SHORT);
//msg.show()
btn_d1_on.setEnabled(false);
try {
sendData("1");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
//@@@@@@@@@@for the controller
btn_d1_off.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
//sendData("0");
//Toast msg = Toast.makeText(getBaseContext(), "The device is now On", Toast.LENGTH_SHORT);
//msg.show();
btn_d1_off.setEnabled(false);
try {
sendData("0");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
private void sendData(String message) throws IOException
//public void sendData(String message)
{
byte[] msgBuffer = message.getBytes();
Log.d(tagStateCTRL, "...Sending data: " + message + "...");
//outStream.write(msgBuffer);
BluetoothCommandService.write(msgBuffer);
}
虽然这是我的BluetoothCommandService.java，其中write（byte [] out）已更改为public static void write(byte[] out)而不是public void write(byte[] out) ...
import java.util.UUID;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.bluetooth.BluetoothDevice;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
//import android.widget.Button;
public class BluetoothCommandService {
private final BluetoothAdapter BTAdapter;
private final Handler bluetoothHandler;
private static int connectionState;
private ConnectThread connectThread;
//private ConnectedThread connectedThread;
public static ConnectedThread connectedThread;
//***Added 12/27/13
private AcceptThread mainAcceptThread;
//connection states of the Bluetooth
public static final int stateNothing = 0; //doing nothing
public static final int stateListen = 1; //listening for incoming connections
public static final int stateConnecting = 2; //initiating an outgoing connection
public static final int stateConnected = 3;
//constants that indicate command to computer
public static final int exitCMD = -1;
public static final int VOL_UP = 1;
public static final int VOL_DOWN = 2;
private static final boolean D = true;
private static final String tagState = "BluetoothCommandService";
//universally unique identifier (UUID)
//The intent of UUIDs is to enable distributed systems to uniquely identify information without significant central coordination
//private static final UUID myUUID = UUID.fromString("04c6093b-0000-1000-8000-00805f9b34fb");
private static final UUID myUUID = UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66");
// ---------> ************* fa87c0d0-afac-11de-8a39-0800200c9a66 ***************** <-----------------
//********************** HC-05 UUID; try this w/ the HC-05 present ***********************************
//Name for the SDP (don;t know what is it) record when creating server socket
private static final String name = "BluetoothCommand";
private static final String BluetoothCommandService = null;
public BluetoothCommandService(Context context, Handler handler) { // context == UI Activity Context && handler == send message back to the UI Activity
BTAdapter = BluetoothAdapter.getDefaultAdapter();
connectionState = stateNothing;
bluetoothHandler = handler;
}
private synchronized void setState(int state) { // state == current connection state; an integer
if (D) Log.d(tagState, "setState() " + connectionState + " -> " + state);
connectionState = state;
//Give the new state to the Handler so that the UI Activity can update
//bluetoothHandler.obtainMessage(what, arg1, arg2)
bluetoothHandler.obtainMessage(MainActivity.MESSAGE_STATE_CHANGE, state, -1).sendToTarget();
}
public synchronized int getState() { //return the current connection state
return connectionState;
}
public synchronized void start() {
if (D) Log.d(tagState, "start");
// Cancel any thread attempting to make a connection
if (connectThread != null)
{
connectThread.cancel();
connectThread = null;
}
// Cancel any thread currently running a connection
if (connectedThread != null)
{
connectedThread.cancel();
connectedThread = null;
}
//********************************************************
//****Added 12/27/13
// Start the thread to listen on a BluetoothServerSocket
if (mainAcceptThread == null)
{
mainAcceptThread = new AcceptThread();
mainAcceptThread.start();
}
setState(stateListen);
}
//device == the BluetoothDevice to connect
public synchronized void connect(BluetoothDevice device) {
if (D) Log.d(tagState, "connect to: " + device);
// Cancel any thread attempting to make a connection
if (connectionState == stateConnecting) {
if (connectThread != null)
{
connectThread.cancel();
connectThread = null;
}
}
// Cancel any thread currently running a connection
if (connectedThread != null)
{
connectedThread.cancel();
connectedThread = null;
}
// Cancel the accept thread because we only want to connect to one device
if (mainAcceptThread != null)
{
mainAcceptThread.cancel();
mainAcceptThread = null;
}
// Start the thread to connect with the given device
connectThread = new ConnectThread(device);
connectThread.start();
setState(stateConnecting);
}
public synchronized void connected(BluetoothSocket socket, BluetoothDevice device) {
if (D) Log.d(tagState, "connected");
// Cancel the thread that completed the connection
if (connectThread != null)
{
connectThread.cancel();
connectThread = null;
}
// Cancel any thread currently running a connection
if (connectedThread != null)
{
connectedThread.cancel();
connectedThread = null;
}
//*********************************************
//****Added 12/27/13
// Cancel the accept thread because we only want to connect to one device
if (mainAcceptThread != null)
{
mainAcceptThread.cancel();
mainAcceptThread = null;
}
// Start the thread to manage the connection and perform transmissions
connectedThread = new ConnectedThread(socket);
connectedThread.start();
// Send the name of the connected device back to the UI Activity
Message msg = bluetoothHandler.obtainMessage(MainActivity.MESSAGE_DEVICE_NAME);
Bundle bundle = new Bundle();
bundle.putString(MainActivity.DEVICENAME, device.getName());
msg.setData(bundle);
bluetoothHandler.sendMessage(msg);
setState(stateConnected);
}
public synchronized void stop() {
if (D) Log.d(tagState, "stop");
if (connectThread != null)
{
connectThread.cancel();
connectThread = null;
}
if (connectedThread != null)
{
connectedThread.cancel();
connectedThread = null;
}
//*****************************************
//****Added 12/27/13
if (mainAcceptThread != null)
{
mainAcceptThread.cancel();
mainAcceptThread = null;
}
setState(stateNothing);
}
public static void write(byte[] out) {
// Create temporary object
ConnectedThread r;
// Synchronize a copy of the ConnectedThread
//synchronized (this) {
//synchronized (ConnectedThread) {
// if (connectionState != stateConnected) return;
r = connectedThread;
//}
// Perform the write unsynchronized
r.write(out);
}
public void write(int out) {
// Create temporary object
ConnectedThread r;
// Synchronize a copy of the ConnectedThread
synchronized (this) {
if (connectionState != stateConnected) return;
r = connectedThread;
}
// Perform the write unsynchronized
r.write(out);
}
private void connectionFailed() {
setState(stateListen);
// Send a failure message back to the Activity
Message msg = bluetoothHandler.obtainMessage(MainActivity.MESSAGE_TOAST);
Bundle bundle = new Bundle();
bundle.putString(MainActivity.TOAST, "Unable to connect device");
msg.setData(bundle);
bluetoothHandler.sendMessage(msg);
}
/**
* Indicate that the connection was lost and notify the UI Activity.
*/
private void connectionLost() {
setState(stateListen);
// Send a failure message back to the Activity
Message msg = bluetoothHandler.obtainMessage(MainActivity.MESSAGE_TOAST);
Bundle bundle = new Bundle();
bundle.putString(MainActivity.TOAST, "Device connection was lost");
msg.setData(bundle);
bluetoothHandler.sendMessage(msg);
}
//ConnectThread runs while attempting to amke an outgoing connection w/ device
//private class ConnectThread extends Thread {
//private final BluetoothSocket connectThread_socket;
//private final BluetoothDevice connectThread_device;
public class ConnectThread extends Thread {
public final BluetoothSocket connectThread_socket;
public final BluetoothDevice connectThread_device;
public ConnectThread(BluetoothDevice device) {
connectThread_device = device;
BluetoothSocket tmp = null;
//Get a BluetoothSocket for a connection w/ the given BT device
//try {
//tmp = device.createRfcommSocketToServiceRecord(myUUID);} //ready to start a secure outgoing connection to this remote device using SDP lookup of uuid
//catch (IOException e) {
//Log.e(tag, msg, tr)
//Log.e(tagState, "create() failed", e);}
//Added 12/28/13
Method m;
try {
m = device.getClass().getMethod("createRfcommSocket", new Class[] {int.class});
tmp = (BluetoothSocket) m.invoke(device, 1);
} catch (SecurityException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (NoSuchMethodException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
connectThread_socket = tmp;
}
public void run() {
Log.i(tagState, "BEGIN ConnectThread");
setName("ConnectThread");
// Always cancel discovery because it will slow down a connection
BTAdapter.cancelDiscovery();
// Make a connection to the BluetoothSocket
try {
// This is a blocking call and will only return on a
// successful connection or an exception
connectThread_socket.connect();}
catch (IOException e) {
connectionFailed();
// Close the socket
try {
connectThread_socket.close();
} catch (IOException e2) {
Log.e(tagState, "Unable to close() socket during connection failure", e2);
}
// Start the service over to restart listening mode
BluetoothCommandService.this.start();
return;
}
// Reset the ConnectThread because we're done
synchronized (BluetoothCommandService.this) {
connectThread = null;
}
// Start the connected thread
connected(connectThread_socket, connectThread_device); //ERROR: will still create "connected"
}
public void cancel() {
try {
connectThread_socket.close();
} catch (IOException e) {
Log.e(tagState, "close() of connect socket failed", e);
}
}
}
//ConnectedThread runs while theres a connection w/ other remote device
///private class ConnectedThread extends Thread {
//private final BluetoothSocket connectedThread_socket;
//private final InputStream connectedThread_inStream;
//private final OutputStream connectedThread_outStream;
public class ConnectedThread extends Thread {
public final BluetoothSocket connectedThread_socket;
public final InputStream connectedThread_inStream;
public final OutputStream connectedThread_outStream;
public ConnectedThread(BluetoothSocket socket) {
Log.d(tagState, "create ConnectedThread");
connectedThread_socket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
// Get the BluetoothSocket input and output streams
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) {
Log.e(tagState, "temp sockets not created", e);
}
connectedThread_inStream = tmpIn;
connectedThread_outStream = tmpOut;
}
public void run() {
Log.i(tagState, "BEGIN ConnectedThread");
byte[] buffer = new byte[1024]; // WALA JUD KO KASABOT ANI MAN :D
//buffer == the bytes to write
//buffer store for the stream
// Keep listening to the InputStream while connected
while (true) {
try {
// Read from the InputStream
int bytes = connectedThread_inStream.read(buffer);
// Send the obtained bytes to the UI Activity
bluetoothHandler.obtainMessage(MainActivity.MESSAGE_READ, bytes, -1, buffer) //WA KO KASABOT SA SYNTAX YOT!!!!! >_<
.sendToTarget();
} catch (IOException e) {
Log.e(tagState, "disconnected", e);
connectionLost(); //ERROR: will still create "private void CONNECTIONLOST"
break;
}
}
}
public void write(byte[] buffer) {
try {
connectedThread_outStream.write(buffer);
// Share the sent message back to the UI Activity
// mHandler.obtainMessage(BluetoothChat.MESSAGE_WRITE, -1, -1, buffer)
// .sendToTarget();
} catch (IOException e) {
Log.e(tagState, "Exception during write", e);
}
}
public void write(int out) {
try {
connectedThread_outStream.write(out);
// Share the sent message back to the UI Activity
// mHandler.obtainMessage(BluetoothChat.MESSAGE_WRITE, -1, -1, buffer)
// .sendToTarget();
} catch (IOException e) {
Log.e(tagState, "Exception during write", e);
}
}
public void cancel() {
try {
connectedThread_outStream.write(exitCMD);
connectedThread_socket.close();
} catch (IOException e) {
Log.e(tagState, "close() of connect socket failed", e);
}
}
}
//*************************************************************************
//*************************************************************************
//***Added 12/27/13
//***THis thread runs while listening for incoming connections.
//***It behaves like a server-side client. It runs until a connection is accepted (or until cancelled).
private class AcceptThread extends Thread {
// The local server socket
private final BluetoothServerSocket acceptThread_ServerSocket;
public AcceptThread() {
BluetoothServerSocket tmp = null;
// Create a new listening server socket
try {
tmp = BTAdapter.listenUsingRfcommWithServiceRecord(name, myUUID);
} catch (IOException e) {
Log.e(tagState, "listen() failed", e);
}
acceptThread_ServerSocket = tmp;
}
public void run() {
if (D) Log.d(tagState, "BEGIN mainAcceptThread" + this);
setName("AcceptThread");
BluetoothSocket socket = null;
// Listen to the server socket if we're not connected
while (connectionState != stateConnected) {
try {
// This is a blocking call and will only return on a
// successful connection or an exception
socket = acceptThread_ServerSocket.accept();
} catch (IOException e) {
Log.e(tagState, "accept() failed", e);
break;
}
// If a connection was accepted
if (socket != null) {
synchronized (BluetoothCommandService.this) {
switch (connectionState) {
case stateListen:
case stateConnecting:
// Situation normal. Start the connected thread.
connected(socket, socket.getRemoteDevice());
break;
case stateNothing:
case stateConnected:
// Either not ready or already connected. Terminate new socket.
try {
socket.close();
} catch (IOException e) {
Log.e(tagState, "Could not close unwanted socket", e);
}
break;
}
}
}
}
if (D) Log.i(tagState, "END mainAcceptThread");
}
public void cancel() {
if (D) Log.d(tagState, "cancel " + this);
try {
acceptThread_ServerSocket.close();
} catch (IOException e) {
Log.e(tagState, "close() of server failed", e);
}
}
}
}
我已经检查过LogCat，但是这个问题没有相关的错误。任何关于我的问题的帮助，建议或澄清都非常感激。你将对这个项目有很大的帮助。谢谢。
答案 0 :(得分：0)
添加btn_d1_off.setEnabled(true);
btn_d1_on.setEnabled(false);之后
在btn_d1_on.setOnClickListener(new OnClickListener()
在btn_d1_off.setOnClickListener(new OnClickListener()
添加btn_d1_on.setEnabled(true);
btn_d1_off.setEnabled(false);之后
希望这项工作。