蓝牙打印机中的文本格式[英] Format text in bluetooth printer

本文是小编为大家收集整理的关于蓝牙打印机中的文本格式的处理/解决方法,可以参考本文帮助大家快速定位并解决问题,中文翻译不准确的可切换到English标签页查看源文。

问题描述

实际上,我必须实现一个模块,该模块连接到BT终端打印机并在其中打印.我有一个简单但功能上的示例,它可以与打印机一起使用.问题在于这些文本是用纯文本打印的,我必须给它格式,粗体,更改字体大小等等……我该怎么做?我不知道如何...我使用此类:

/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.edec.aptr;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

/**
 * This class does all the work for setting up and managing Bluetooth
 * connections with other devices. It has a thread that listens for incoming
 * connections, a thread for connecting with a device, and a thread for
 * performing data transmissions when connected.
 */
public class BluetoothService {
    // Debugging
    private static final String TAG = "BluetoothService";
    private static final boolean D = true;

    // Name for the SDP record when creating server socket
    private static final String NAME = "BTPrinter";

    // Unique UUID for this application
    private static final UUID MY_UUID = UUID
            .fromString("00001101-0000-1000-8000-00805F9B34FB"); // change by
                                                                    // chongqing
                                                                    // jinou

    // Member fields
    private final BluetoothAdapter mAdapter;
    private final Handler mHandler;
    private AcceptThread mAcceptThread;
    private ConnectThread mConnectThread;
    private ConnectedThread mConnectedThread;
    private int mState;

    // Constants that indicate the current connection state
    public static final int STATE_NONE = 0; // we're doing nothing
    public static final int STATE_LISTEN = 1; // now listening for incoming
                                                // connections
    public static final int STATE_CONNECTING = 2; // now initiating an outgoing
                                                    // connection
    public static final int STATE_CONNECTED = 3; // now connected to a remote
                                                    // device

    /**
     * Constructor. Prepares a new BTPrinter session.
     * 
     * @param context
     *            The UI Activity Context
     * @param handler
     *            A Handler to send messages back to the UI Activity
     */
    public BluetoothService(Context context, Handler handler) {
        mAdapter = BluetoothAdapter.getDefaultAdapter();
        mState = STATE_NONE;
        mHandler = handler;
    }

    /**
     * Set the current state of the connection
     * 
     * @param state
     *            An integer defining the current connection state
     */
    private synchronized void setState(int state) {
        if (D)
            Log.d(TAG, "setState() " + mState + " -> " + state);
        mState = state;

        // Give the new state to the Handler so the UI Activity can update
        mHandler.obtainMessage(amarre.MESSAGE_STATE_CHANGE, state, -1)
                .sendToTarget();
    }

    /**
     * Return the current connection state.
     */
    public synchronized int getState() {
        return mState;
    }

    /**
     * Start the service. Specifically start AcceptThread to begin a session in
     * listening (server) mode. Called by the Activity onResume()
     */
    public synchronized void start() {
        if (D)
            Log.d(TAG, "start");

        // Cancel any thread attempting to make a connection
        if (mConnectThread != null) {
            mConnectThread.cancel();
            mConnectThread = null;
        }

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {
            mConnectedThread.cancel();
            mConnectedThread = null;
        }

        // Start the thread to listen on a BluetoothServerSocket
        if (mAcceptThread == null) {
            mAcceptThread = new AcceptThread();
            mAcceptThread.start();
        }
        setState(STATE_LISTEN);
    }

    /**
     * Start the ConnectThread to initiate a connection to a remote device.
     * 
     * @param device
     *            The BluetoothDevice to connect
     */
    public synchronized void connect(BluetoothDevice device) {
        if (D)
            Log.d(TAG, "connect to: " + device);

        // Cancel any thread attempting to make a connection
        if (mState == STATE_CONNECTING) {
            if (mConnectThread != null) {
                mConnectThread.cancel();
                mConnectThread = null;
            }
        }

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {
            mConnectedThread.cancel();
            mConnectedThread = null;
        }

        // Start the thread to connect with the given device
        mConnectThread = new ConnectThread(device);
        mConnectThread.start();
        setState(STATE_CONNECTING);
    }

    /**
     * Start the ConnectedThread to begin managing a Bluetooth connection
     * 
     * @param socket
     *            The BluetoothSocket on which the connection was made
     * @param device
     *            The BluetoothDevice that has been connected
     */
    public synchronized void connected(BluetoothSocket socket,
            BluetoothDevice device) {
        if (D)
            Log.d(TAG, "connected");

        // Cancel the thread that completed the connection
        if (mConnectThread != null) {
            mConnectThread.cancel();
            mConnectThread = null;
        }

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {
            mConnectedThread.cancel();
            mConnectedThread = null;
        }

        // Cancel the accept thread because we only want to connect to one
        // device
        if (mAcceptThread != null) {
            mAcceptThread.cancel();
            mAcceptThread = null;
        }

        // Start the thread to manage the connection and perform transmissions
        mConnectedThread = new ConnectedThread(socket);
        mConnectedThread.start();

        // Send the name of the connected device back to the UI Activity
        Message msg = mHandler.obtainMessage(amarre.MESSAGE_DEVICE_NAME);
        Bundle bundle = new Bundle();
        bundle.putString(amarre.DEVICE_NAME, device.getName());
        msg.setData(bundle);
        mHandler.sendMessage(msg);

        setState(STATE_CONNECTED);
    }

    /**
     * Stop all threads
     */
    public synchronized void stop() {
        if (D)
            Log.d(TAG, "stop");
        setState(STATE_NONE);
        if (mConnectThread != null) {
            mConnectThread.cancel();
            mConnectThread = null;
        }
        if (mConnectedThread != null) {
            mConnectedThread.cancel();
            mConnectedThread = null;
        }
        if (mAcceptThread != null) {
            mAcceptThread.cancel();
            mAcceptThread = null;
        }
    }

    /**
     * Write to the ConnectedThread in an unsynchronized manner
     * 
     * @param out
     *            The bytes to write
     * @see ConnectedThread#write(byte[])
     */
    public void write(byte[] out) {
        // Create temporary object
        ConnectedThread r;
        // Synchronize a copy of the ConnectedThread
        synchronized (this) {
            if (mState != STATE_CONNECTED)
                return;
            r = mConnectedThread;
        }
        // Perform the write unsynchronized
        r.write(out);
    }

    /**
     * Indicate that the connection attempt failed and notify the UI Activity.
     */
    private void connectionFailed() {
        setState(STATE_LISTEN);

        // Send a failure message back to the Activity
        Message msg = mHandler.obtainMessage(amarre.MESSAGE_TOAST);
        Bundle bundle = new Bundle();
        bundle.putString(
                amarre.TOAST,
                "No se puede conectar al dispostivo, verifique que éste se encuentra encendido y cercano a la tablet");
        msg.setData(bundle);
        mHandler.sendMessage(msg);
    }

    /**
     * Indicate that the connection was lost and notify the UI Activity.
     */
    private void connectionLost() {
        // setState(STATE_LISTEN);

        // Send a failure message back to the Activity
        Message msg = mHandler.obtainMessage(amarre.MESSAGE_TOAST);
        Bundle bundle = new Bundle();
        bundle.putString(amarre.TOAST,
                "La conexión con el dispositivo se ha perdido");
        msg.setData(bundle);
        mHandler.sendMessage(msg);
    }

    /**
     * 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 mmServerSocket;

        public AcceptThread() {
            BluetoothServerSocket tmp = null;

            // Create a new listening server socket
            try {
                tmp = mAdapter
                        .listenUsingRfcommWithServiceRecord(NAME, MY_UUID);
            } catch (IOException e) {
                Log.e(TAG, "listen() failed", e);
            }
            mmServerSocket = tmp;
        }

        public void run() {
            if (D)
                Log.d(TAG, "BEGIN mAcceptThread" + this);
            setName("AcceptThread");
            BluetoothSocket socket = null;

            // Listen to the server socket if we're not connected
            while (mState != STATE_CONNECTED) {
                try {
                    // This is a blocking call and will only return on a
                    // successful connection or an exception
                    socket = mmServerSocket.accept();
                } catch (IOException e) {
                    Log.e(TAG, "accept() failed", e);
                    break;
                }

                // If a connection was accepted
                if (socket != null) {
                    synchronized (BluetoothService.this) {
                        switch (mState) {
                        case STATE_LISTEN:
                        case STATE_CONNECTING:
                            // Situation normal. Start the connected thread.
                            connected(socket, socket.getRemoteDevice());
                            break;
                        case STATE_NONE:
                        case STATE_CONNECTED:
                            // Either not ready or already connected. Terminate
                            // new socket.
                            try {
                                socket.close();
                            } catch (IOException e) {
                                Log.e(TAG, "Could not close unwanted socket", e);
                            }
                            break;
                        }
                    }
                }
            }
            if (D)
                Log.i(TAG, "END mAcceptThread");
        }

        public void cancel() {
            if (D)
                Log.d(TAG, "cancel " + this);
            try {
                mmServerSocket.close();
            } catch (IOException e) {
                Log.e(TAG, "close() of server failed", e);
            }
        }
    }

    /**
     * This thread runs while attempting to make an outgoing connection with a
     * device. It runs straight through; the connection either succeeds or
     * fails.
     */
    private class ConnectThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final BluetoothDevice mmDevice;

        public ConnectThread(BluetoothDevice device) {
            mmDevice = device;
            BluetoothSocket tmp = null;

            // Get a BluetoothSocket for a connection with the
            // given BluetoothDevice
            try {
                tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
            } catch (IOException e) {
                Log.e(TAG, "create() failed", e);
            }
            mmSocket = tmp;
        }

        public void run() {
            Log.i(TAG, "BEGIN mConnectThread");
            setName("ConnectThread");

            // Always cancel discovery because it will slow down a connection
            mAdapter.cancelDiscovery();

            // Make a connection to the BluetoothSocket
            try {
                // This is a blocking call and will only return on a
                // successful connection or an exception
                mmSocket.connect();
            } catch (IOException e) {
                connectionFailed();
                // Close the socket
                try {
                    mmSocket.close();
                } catch (IOException e2) {
                    Log.e(TAG,
                            "unable to close() socket during connection failure",
                            e2);
                }
                // Start the service over to restart listening mode
                BluetoothService.this.start();
                return;
            }

            // Reset the ConnectThread because we're done
            synchronized (BluetoothService.this) {
                mConnectThread = null;
            }

            // Start the connected thread
            connected(mmSocket, mmDevice);
        }

        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) {
                Log.e(TAG, "close() of connect socket failed", e);
            }
        }
    }

    /**
     * This thread runs during a connection with a remote device. It handles all
     * incoming and outgoing transmissions.
     */
    private class ConnectedThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final InputStream mmInStream;
        private final OutputStream mmOutStream;

        public ConnectedThread(BluetoothSocket socket) {
            Log.d(TAG, "create ConnectedThread");
            mmSocket = 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(TAG, "temp sockets not created", e);
            }

            mmInStream = tmpIn;
            mmOutStream = tmpOut;
        }

        public void run() {
            Log.i(TAG, "BEGIN mConnectedThread");
            int bytes;

            // Keep listening to the InputStream while connected
            while (true) {
                try {
                    byte[] buffer = new byte[256];
                    // Read from the InputStream
                    bytes = mmInStream.read(buffer);
                    if (bytes > 0) {
                        // Send the obtained bytes to the UI Activity
                        mHandler.obtainMessage(amarre.MESSAGE_READ, bytes, -1,
                                buffer).sendToTarget();
                    } else {
                        Log.e(TAG, "disconnected");
                        connectionLost();

                        // add by chongqing jinou
                        if (mState != STATE_NONE) {
                            Log.e(TAG, "disconnected");
                            // Start the service over to restart listening mode
                            BluetoothService.this.start();
                        }
                        break;
                    }
                } catch (IOException e) {
                    Log.e(TAG, "disconnected", e);
                    connectionLost();

                    // add by chongqing jinou
                    if (mState != STATE_NONE) {
                        // Start the service over to restart listening mode
                        BluetoothService.this.start();
                    }
                    break;
                }
            }
        }

        /**
         * Write to the connected OutStream.
         * 
         * @param buffer
         *            The bytes to write
         */
        public void write(byte[] buffer) {
            try {
                mmOutStream.write(buffer);
                // Share the sent message back to the UI Activity
                mHandler.obtainMessage(amarre.MESSAGE_WRITE, -1, -1, buffer)
                        .sendToTarget();
            } catch (IOException e) {
                Log.e(TAG, "Exception during write", e);
            }
        }

        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) {
                Log.e(TAG, "close() of connect socket failed", e);
            }
        }
    }
}

我从另一类发送数据,因此:

        byte[] send;
        try {
            send = message.getBytes("GB2312");
        } catch (UnsupportedEncodingException e) {
            send = message.getBytes();

        }

        mService.write(send);

消息是字符串var.

推荐答案

现在我知道该怎么做.我必须在Linux上使用dex2jar应用逆向工程,并从市场上进行逆转.

out.write(str.getBytes(),0,str.getBytes().length);

您将发送到方法A字节[]数组.您可以通过发送另一个字节[]数组在发送真实字节[]数组...

之前修改格式.

默认格式字节[]数组是:

byte[] arrayOfByte1 = { 27, 33, 0 };

所以您可以尝试以下操作:

byte[] format = { 27, 33, 0 };

out.write(format);

out.write(str.getBytes(),0,str.getBytes().length);

这些行将打印默认格式文本,但是如果您尝试以下代码,

byte[] format = { 27, 33, 0 };

format[2] = ((byte)(0x8 | arrayOfByte1[2]));

out.write(format);

out.write(str.getBytes(),0,str.getBytes().length);

它将以粗体样式打印文本...您可以尝试这些其他格式数组:

// Bold
format[2] = ((byte)(0x8 | arrayOfByte1[2]));

// Height
format[2] = ((byte)(0x10 | arrayOfByte1[2]));

// Width
format[2] = ((byte) (0x20 | arrayOfByte1[2]));

// Underline
format[2] = ((byte)(0x80 | arrayOfByte1[2]));

// Small
format[2] = ((byte)(0x1 | arrayOfByte1[2]));

也可以组合它,然后,如果您喜欢少量和粗体的文本,请输入这些数组分配,例如:

byte[] format = { 27, 33, 0 };

// Bold
format[2] = ((byte)(0x8 | arrayOfByte1[2]));
// Height
format[2] = ((byte)(0x10 | arrayOfByte1[2]));
// Width
format[2] = ((byte) (0x20 | arrayOfByte1[2]));
// Underline
// format[2] = ((byte)(0x80 | arrayOfByte1[2]));
// Small
// format[2] = ((byte)(0x1 | arrayOfByte1[2]));
out.write(format);
out.write(str.getBytes(),0,str.getBytes().length);

最后一个代码打印最大的文本大小.

其他推荐答案

我知道这是一个旧线程,但它帮助我很多,因此我决定共享我的代码以简化格式使用.

示例用法:

final String message = "Example message\n";
// Default format:
writeWithFormat(message.getBytes(), new Formatter().get(), Formatter.leftAlign());
// Bold format center:
writeWithFormat(message.getBytes(), new Formatter().bold().get(), Formatter.centerAlign());
// Bold underlined format with right alignment:
writeWithFormat(message.getBytes(), new Formatter().bold().underlined().get(), Formatter.rightAlign());

带有构建器模式的格式化类:

/**
 * Class for formatting
 */
public static class Formatter {
    /** The format that is being build on */
    private byte[] mFormat;

    public Formatter() {
        // Default:
        mFormat = new byte[]{27, 33, 0};
    }

    /**
     * Method to get the Build result
     *
     * @return the format
     */
    public byte[] get() {
        return mFormat;
    }

    public Formatter bold() {
        // Apply bold:
        mFormat[2] = ((byte) (0x8 | mFormat[2]));
        return this;
    }

    public Formatter small() {
        mFormat[2] = ((byte) (0x1 | mFormat[2]));
        return this;
    }

    public Formatter height() {
        mFormat[2] = ((byte) (0x10 | mFormat[2]));
        return this;
    }

    public Formatter width() {
        mFormat[2] = ((byte) (0x20 | mFormat[2]));
        return this;
    }

    public Formatter underlined() {
        mFormat[2] = ((byte) (0x80 | mFormat[2]));
        return this;
    }

    public static byte[] rightAlign(){
        return new byte[]{0x1B, 'a', 0x02};
    }

    public static byte[] leftAlign(){
        return new byte[]{0x1B, 'a', 0x00};
    }

    public static byte[] centerAlign(){
        return new byte[]{0x1B, 'a', 0x01};
    }
}

使用格式的写入方法如下:

     /**
     * Method to write with a given format
     *
     * @param buffer     the array of bytes to actually write
     * @param pFormat    The format byte array
     * @param pAlignment The alignment byte array
     * @return true on successful write, false otherwise
     */
    public boolean writeWithFormat(byte[] buffer, final byte[] pFormat, final byte[] pAlignment) {
        try {
            // Notify printer it should be printed with given alignment:
            mOutputStream.write(pAlignment);
            // Notify printer it should be printed in the given format:
            mOutputStream.write(pFormat);
            // Write the actual data:
            mOutputStream.write(buffer, 0, buffer.length);

            // Share the sent message back to the UI Activity
            App.getInstance().getHandler().obtainMessage(MESSAGE_WRITE, buffer.length, -1, buffer).sendToTarget();
            return true;
        } catch (IOException e) {
            Log.e(TAG, "Exception during write", e);
            return false;
        }
    }

其他推荐答案

有两个感知:

您只是试图通过文本打印.您要离开打印机的选项,以选择打印它想要.

检查您的打印机是否支持基本打印配置文件[BPP] - 基于工作的转移.我成功地以HTML格式打印它,蓝牙打印机上的图像和文本.

另外,请检查您提供的UUID.对于对象推送配置文件,基于BPP的转移配置文件,它们是不同的UUID.我建议您将UUID用于BPP [基于工作的转移] 并尝试通过格式的文本传递XHTML文件.

谢谢 mani

本文地址:https://www.itbaoku.cn/post/102603.html

问题描述

actually, I have to implement a module the which connect to a BT termical printer and print in it. I have a simple but functionally example, it works with the printer. The problem is that these text are printed in plain text, and i have to give it format, bold, change the font size and others... How can i do it??. I don't know how... I use this Class:

/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.edec.aptr;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

/**
 * This class does all the work for setting up and managing Bluetooth
 * connections with other devices. It has a thread that listens for incoming
 * connections, a thread for connecting with a device, and a thread for
 * performing data transmissions when connected.
 */
public class BluetoothService {
    // Debugging
    private static final String TAG = "BluetoothService";
    private static final boolean D = true;

    // Name for the SDP record when creating server socket
    private static final String NAME = "BTPrinter";

    // Unique UUID for this application
    private static final UUID MY_UUID = UUID
            .fromString("00001101-0000-1000-8000-00805F9B34FB"); // change by
                                                                    // chongqing
                                                                    // jinou

    // Member fields
    private final BluetoothAdapter mAdapter;
    private final Handler mHandler;
    private AcceptThread mAcceptThread;
    private ConnectThread mConnectThread;
    private ConnectedThread mConnectedThread;
    private int mState;

    // Constants that indicate the current connection state
    public static final int STATE_NONE = 0; // we're doing nothing
    public static final int STATE_LISTEN = 1; // now listening for incoming
                                                // connections
    public static final int STATE_CONNECTING = 2; // now initiating an outgoing
                                                    // connection
    public static final int STATE_CONNECTED = 3; // now connected to a remote
                                                    // device

    /**
     * Constructor. Prepares a new BTPrinter session.
     * 
     * @param context
     *            The UI Activity Context
     * @param handler
     *            A Handler to send messages back to the UI Activity
     */
    public BluetoothService(Context context, Handler handler) {
        mAdapter = BluetoothAdapter.getDefaultAdapter();
        mState = STATE_NONE;
        mHandler = handler;
    }

    /**
     * Set the current state of the connection
     * 
     * @param state
     *            An integer defining the current connection state
     */
    private synchronized void setState(int state) {
        if (D)
            Log.d(TAG, "setState() " + mState + " -> " + state);
        mState = state;

        // Give the new state to the Handler so the UI Activity can update
        mHandler.obtainMessage(amarre.MESSAGE_STATE_CHANGE, state, -1)
                .sendToTarget();
    }

    /**
     * Return the current connection state.
     */
    public synchronized int getState() {
        return mState;
    }

    /**
     * Start the service. Specifically start AcceptThread to begin a session in
     * listening (server) mode. Called by the Activity onResume()
     */
    public synchronized void start() {
        if (D)
            Log.d(TAG, "start");

        // Cancel any thread attempting to make a connection
        if (mConnectThread != null) {
            mConnectThread.cancel();
            mConnectThread = null;
        }

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {
            mConnectedThread.cancel();
            mConnectedThread = null;
        }

        // Start the thread to listen on a BluetoothServerSocket
        if (mAcceptThread == null) {
            mAcceptThread = new AcceptThread();
            mAcceptThread.start();
        }
        setState(STATE_LISTEN);
    }

    /**
     * Start the ConnectThread to initiate a connection to a remote device.
     * 
     * @param device
     *            The BluetoothDevice to connect
     */
    public synchronized void connect(BluetoothDevice device) {
        if (D)
            Log.d(TAG, "connect to: " + device);

        // Cancel any thread attempting to make a connection
        if (mState == STATE_CONNECTING) {
            if (mConnectThread != null) {
                mConnectThread.cancel();
                mConnectThread = null;
            }
        }

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {
            mConnectedThread.cancel();
            mConnectedThread = null;
        }

        // Start the thread to connect with the given device
        mConnectThread = new ConnectThread(device);
        mConnectThread.start();
        setState(STATE_CONNECTING);
    }

    /**
     * Start the ConnectedThread to begin managing a Bluetooth connection
     * 
     * @param socket
     *            The BluetoothSocket on which the connection was made
     * @param device
     *            The BluetoothDevice that has been connected
     */
    public synchronized void connected(BluetoothSocket socket,
            BluetoothDevice device) {
        if (D)
            Log.d(TAG, "connected");

        // Cancel the thread that completed the connection
        if (mConnectThread != null) {
            mConnectThread.cancel();
            mConnectThread = null;
        }

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {
            mConnectedThread.cancel();
            mConnectedThread = null;
        }

        // Cancel the accept thread because we only want to connect to one
        // device
        if (mAcceptThread != null) {
            mAcceptThread.cancel();
            mAcceptThread = null;
        }

        // Start the thread to manage the connection and perform transmissions
        mConnectedThread = new ConnectedThread(socket);
        mConnectedThread.start();

        // Send the name of the connected device back to the UI Activity
        Message msg = mHandler.obtainMessage(amarre.MESSAGE_DEVICE_NAME);
        Bundle bundle = new Bundle();
        bundle.putString(amarre.DEVICE_NAME, device.getName());
        msg.setData(bundle);
        mHandler.sendMessage(msg);

        setState(STATE_CONNECTED);
    }

    /**
     * Stop all threads
     */
    public synchronized void stop() {
        if (D)
            Log.d(TAG, "stop");
        setState(STATE_NONE);
        if (mConnectThread != null) {
            mConnectThread.cancel();
            mConnectThread = null;
        }
        if (mConnectedThread != null) {
            mConnectedThread.cancel();
            mConnectedThread = null;
        }
        if (mAcceptThread != null) {
            mAcceptThread.cancel();
            mAcceptThread = null;
        }
    }

    /**
     * Write to the ConnectedThread in an unsynchronized manner
     * 
     * @param out
     *            The bytes to write
     * @see ConnectedThread#write(byte[])
     */
    public void write(byte[] out) {
        // Create temporary object
        ConnectedThread r;
        // Synchronize a copy of the ConnectedThread
        synchronized (this) {
            if (mState != STATE_CONNECTED)
                return;
            r = mConnectedThread;
        }
        // Perform the write unsynchronized
        r.write(out);
    }

    /**
     * Indicate that the connection attempt failed and notify the UI Activity.
     */
    private void connectionFailed() {
        setState(STATE_LISTEN);

        // Send a failure message back to the Activity
        Message msg = mHandler.obtainMessage(amarre.MESSAGE_TOAST);
        Bundle bundle = new Bundle();
        bundle.putString(
                amarre.TOAST,
                "No se puede conectar al dispostivo, verifique que éste se encuentra encendido y cercano a la tablet");
        msg.setData(bundle);
        mHandler.sendMessage(msg);
    }

    /**
     * Indicate that the connection was lost and notify the UI Activity.
     */
    private void connectionLost() {
        // setState(STATE_LISTEN);

        // Send a failure message back to the Activity
        Message msg = mHandler.obtainMessage(amarre.MESSAGE_TOAST);
        Bundle bundle = new Bundle();
        bundle.putString(amarre.TOAST,
                "La conexión con el dispositivo se ha perdido");
        msg.setData(bundle);
        mHandler.sendMessage(msg);
    }

    /**
     * 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 mmServerSocket;

        public AcceptThread() {
            BluetoothServerSocket tmp = null;

            // Create a new listening server socket
            try {
                tmp = mAdapter
                        .listenUsingRfcommWithServiceRecord(NAME, MY_UUID);
            } catch (IOException e) {
                Log.e(TAG, "listen() failed", e);
            }
            mmServerSocket = tmp;
        }

        public void run() {
            if (D)
                Log.d(TAG, "BEGIN mAcceptThread" + this);
            setName("AcceptThread");
            BluetoothSocket socket = null;

            // Listen to the server socket if we're not connected
            while (mState != STATE_CONNECTED) {
                try {
                    // This is a blocking call and will only return on a
                    // successful connection or an exception
                    socket = mmServerSocket.accept();
                } catch (IOException e) {
                    Log.e(TAG, "accept() failed", e);
                    break;
                }

                // If a connection was accepted
                if (socket != null) {
                    synchronized (BluetoothService.this) {
                        switch (mState) {
                        case STATE_LISTEN:
                        case STATE_CONNECTING:
                            // Situation normal. Start the connected thread.
                            connected(socket, socket.getRemoteDevice());
                            break;
                        case STATE_NONE:
                        case STATE_CONNECTED:
                            // Either not ready or already connected. Terminate
                            // new socket.
                            try {
                                socket.close();
                            } catch (IOException e) {
                                Log.e(TAG, "Could not close unwanted socket", e);
                            }
                            break;
                        }
                    }
                }
            }
            if (D)
                Log.i(TAG, "END mAcceptThread");
        }

        public void cancel() {
            if (D)
                Log.d(TAG, "cancel " + this);
            try {
                mmServerSocket.close();
            } catch (IOException e) {
                Log.e(TAG, "close() of server failed", e);
            }
        }
    }

    /**
     * This thread runs while attempting to make an outgoing connection with a
     * device. It runs straight through; the connection either succeeds or
     * fails.
     */
    private class ConnectThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final BluetoothDevice mmDevice;

        public ConnectThread(BluetoothDevice device) {
            mmDevice = device;
            BluetoothSocket tmp = null;

            // Get a BluetoothSocket for a connection with the
            // given BluetoothDevice
            try {
                tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
            } catch (IOException e) {
                Log.e(TAG, "create() failed", e);
            }
            mmSocket = tmp;
        }

        public void run() {
            Log.i(TAG, "BEGIN mConnectThread");
            setName("ConnectThread");

            // Always cancel discovery because it will slow down a connection
            mAdapter.cancelDiscovery();

            // Make a connection to the BluetoothSocket
            try {
                // This is a blocking call and will only return on a
                // successful connection or an exception
                mmSocket.connect();
            } catch (IOException e) {
                connectionFailed();
                // Close the socket
                try {
                    mmSocket.close();
                } catch (IOException e2) {
                    Log.e(TAG,
                            "unable to close() socket during connection failure",
                            e2);
                }
                // Start the service over to restart listening mode
                BluetoothService.this.start();
                return;
            }

            // Reset the ConnectThread because we're done
            synchronized (BluetoothService.this) {
                mConnectThread = null;
            }

            // Start the connected thread
            connected(mmSocket, mmDevice);
        }

        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) {
                Log.e(TAG, "close() of connect socket failed", e);
            }
        }
    }

    /**
     * This thread runs during a connection with a remote device. It handles all
     * incoming and outgoing transmissions.
     */
    private class ConnectedThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final InputStream mmInStream;
        private final OutputStream mmOutStream;

        public ConnectedThread(BluetoothSocket socket) {
            Log.d(TAG, "create ConnectedThread");
            mmSocket = 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(TAG, "temp sockets not created", e);
            }

            mmInStream = tmpIn;
            mmOutStream = tmpOut;
        }

        public void run() {
            Log.i(TAG, "BEGIN mConnectedThread");
            int bytes;

            // Keep listening to the InputStream while connected
            while (true) {
                try {
                    byte[] buffer = new byte[256];
                    // Read from the InputStream
                    bytes = mmInStream.read(buffer);
                    if (bytes > 0) {
                        // Send the obtained bytes to the UI Activity
                        mHandler.obtainMessage(amarre.MESSAGE_READ, bytes, -1,
                                buffer).sendToTarget();
                    } else {
                        Log.e(TAG, "disconnected");
                        connectionLost();

                        // add by chongqing jinou
                        if (mState != STATE_NONE) {
                            Log.e(TAG, "disconnected");
                            // Start the service over to restart listening mode
                            BluetoothService.this.start();
                        }
                        break;
                    }
                } catch (IOException e) {
                    Log.e(TAG, "disconnected", e);
                    connectionLost();

                    // add by chongqing jinou
                    if (mState != STATE_NONE) {
                        // Start the service over to restart listening mode
                        BluetoothService.this.start();
                    }
                    break;
                }
            }
        }

        /**
         * Write to the connected OutStream.
         * 
         * @param buffer
         *            The bytes to write
         */
        public void write(byte[] buffer) {
            try {
                mmOutStream.write(buffer);
                // Share the sent message back to the UI Activity
                mHandler.obtainMessage(amarre.MESSAGE_WRITE, -1, -1, buffer)
                        .sendToTarget();
            } catch (IOException e) {
                Log.e(TAG, "Exception during write", e);
            }
        }

        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) {
                Log.e(TAG, "close() of connect socket failed", e);
            }
        }
    }
}

I send the data from another class, so:

        byte[] send;
        try {
            send = message.getBytes("GB2312");
        } catch (UnsupportedEncodingException e) {
            send = message.getBytes();

        }

        mService.write(send);

message is a String var.. Then, how can I format the text??, or at least, change font size...

推荐答案

Now I know how to do it. I had to apply reverse engineering and de-compile an .apk from the market, using dex2jar on Linux and then opening the jar with java de-compiler... Try this...When you write this command:

out.write(str.getBytes(),0,str.getBytes().length);

you are sending to the method a byte[] array. You can modify the format by sending another byte[] array before sending the real byte[] array...

The default format byte[] array is this:

byte[] arrayOfByte1 = { 27, 33, 0 };

So u can try this:

byte[] format = { 27, 33, 0 };

out.write(format);

out.write(str.getBytes(),0,str.getBytes().length);

These lines will print the default format text, but if you try below code,

byte[] format = { 27, 33, 0 };

format[2] = ((byte)(0x8 | arrayOfByte1[2]));

out.write(format);

out.write(str.getBytes(),0,str.getBytes().length);

it will print text in bold style... You can try these other format arrays:

// Bold
format[2] = ((byte)(0x8 | arrayOfByte1[2]));

// Height
format[2] = ((byte)(0x10 | arrayOfByte1[2]));

// Width
format[2] = ((byte) (0x20 | arrayOfByte1[2]));

// Underline
format[2] = ((byte)(0x80 | arrayOfByte1[2]));

// Small
format[2] = ((byte)(0x1 | arrayOfByte1[2]));

Also you can combine it, then if you like little and bold text, uncomment these array assignments, for example:

byte[] format = { 27, 33, 0 };

// Bold
format[2] = ((byte)(0x8 | arrayOfByte1[2]));
// Height
format[2] = ((byte)(0x10 | arrayOfByte1[2]));
// Width
format[2] = ((byte) (0x20 | arrayOfByte1[2]));
// Underline
// format[2] = ((byte)(0x80 | arrayOfByte1[2]));
// Small
// format[2] = ((byte)(0x1 | arrayOfByte1[2]));
out.write(format);
out.write(str.getBytes(),0,str.getBytes().length);

This last code prints que biggest text size.

其他推荐答案

I know this is an old thread but it helped me alot so I decided to share my code for simplified use of Formatting.

Sample usage:

final String message = "Example message\n";
// Default format:
writeWithFormat(message.getBytes(), new Formatter().get(), Formatter.leftAlign());
// Bold format center:
writeWithFormat(message.getBytes(), new Formatter().bold().get(), Formatter.centerAlign());
// Bold underlined format with right alignment:
writeWithFormat(message.getBytes(), new Formatter().bold().underlined().get(), Formatter.rightAlign());

Formatter class with Builder pattern:

/**
 * Class for formatting
 */
public static class Formatter {
    /** The format that is being build on */
    private byte[] mFormat;

    public Formatter() {
        // Default:
        mFormat = new byte[]{27, 33, 0};
    }

    /**
     * Method to get the Build result
     *
     * @return the format
     */
    public byte[] get() {
        return mFormat;
    }

    public Formatter bold() {
        // Apply bold:
        mFormat[2] = ((byte) (0x8 | mFormat[2]));
        return this;
    }

    public Formatter small() {
        mFormat[2] = ((byte) (0x1 | mFormat[2]));
        return this;
    }

    public Formatter height() {
        mFormat[2] = ((byte) (0x10 | mFormat[2]));
        return this;
    }

    public Formatter width() {
        mFormat[2] = ((byte) (0x20 | mFormat[2]));
        return this;
    }

    public Formatter underlined() {
        mFormat[2] = ((byte) (0x80 | mFormat[2]));
        return this;
    }

    public static byte[] rightAlign(){
        return new byte[]{0x1B, 'a', 0x02};
    }

    public static byte[] leftAlign(){
        return new byte[]{0x1B, 'a', 0x00};
    }

    public static byte[] centerAlign(){
        return new byte[]{0x1B, 'a', 0x01};
    }
}

The write method that uses the formatting looks like this:

     /**
     * Method to write with a given format
     *
     * @param buffer     the array of bytes to actually write
     * @param pFormat    The format byte array
     * @param pAlignment The alignment byte array
     * @return true on successful write, false otherwise
     */
    public boolean writeWithFormat(byte[] buffer, final byte[] pFormat, final byte[] pAlignment) {
        try {
            // Notify printer it should be printed with given alignment:
            mOutputStream.write(pAlignment);
            // Notify printer it should be printed in the given format:
            mOutputStream.write(pFormat);
            // Write the actual data:
            mOutputStream.write(buffer, 0, buffer.length);

            // Share the sent message back to the UI Activity
            App.getInstance().getHandler().obtainMessage(MESSAGE_WRITE, buffer.length, -1, buffer).sendToTarget();
            return true;
        } catch (IOException e) {
            Log.e(TAG, "Exception during write", e);
            return false;
        }
    }

其他推荐答案

There are two perceptions to this:

you are just trying to print by passing the text. You are leaving option to the printer to choose to print anyway it wants.

check whether your printer supports Basic Printing Profile[BPP] - Job Based Transfer. I had success printing it in html format, both images and text on a bluetooth printer.

Also, check for the UUID you are providing. They are different UUID for Object push profile, BPP Job Based Transfer profile. I suggest you use the UUID assiged for BPP[Job based transfer] and try passing a xhtml file with formatted text.

Thanks Mani