在Android中使用爱普生蓝牙打印机打印粗体字母
这是我的全部工作代码在Android中使用爱普生蓝牙打印机打印粗体字母,android,printing,bluetooth,epson,Android,Printing,Bluetooth,Epson,这是我的全部工作代码 public class NewActivity extends Activity{ // will show the statuses like bluetooth open, close or data sent TextView myLabel; // will enable user to enter any text to be printed EditText myTextbox; // android built in classes for bluet
public class NewActivity extends Activity{
// will show the statuses like bluetooth open, close or data sent
TextView myLabel;
// will enable user to enter any text to be printed
EditText myTextbox;
// android built in classes for bluetooth operations
BluetoothAdapter mBluetoothAdapter;
BluetoothSocket mmSocket;
BluetoothDevice mmDevice;
// needed for communication to bluetooth device / network
OutputStream mmOutputStream;
InputStream mmInputStream;
Thread workerThread;
byte[] readBuffer;
int readBufferPosition;
volatile boolean stopWorker;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.new_main);
try {
// more codes will be here
}catch(Exception e) {
e.printStackTrace();
}
// we are going to have three buttons for specific functions
Button openButton = (Button) findViewById(R.id.open);
Button sendButton = (Button) findViewById(R.id.send);
Button closeButton = (Button) findViewById(R.id.close);
// text label and input box
myLabel = (TextView) findViewById(R.id.label);
myTextbox = (EditText) findViewById(R.id.entry);
// open bluetooth connection
openButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
findBT();
openBT();
} catch (IOException ex) {
ex.printStackTrace();
}
}
});
// send data typed by the user to be printed
sendButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
sendData();
} catch (IOException ex) {
ex.printStackTrace();
}
}
});
// close bluetooth connection
closeButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
closeBT();
} catch (IOException ex) {
ex.printStackTrace();
}
}
});
}
// close the connection to bluetooth printer.
void closeBT() throws IOException {
try {
stopWorker = true;
mmOutputStream.close();
mmInputStream.close();
mmSocket.close();
myLabel.setText("Bluetooth Closed");
} catch (Exception e) {
e.printStackTrace();
}
}
// this will send text data to be printed by the bluetooth printer
void sendData() throws IOException {
try {
Spanned msg = Html.fromHtml("<h1>My First Example</h1> <p>My first Print.</p> <p><b>This is a paragraph.</b></p>");
myTextbox.setText(msg, TextView.BufferType.SPANNABLE);
byte[] arrayOfByte1 = { 27, 33, 0 };
byte[] format = { 27, 33, 0 };
// Bold
format[2] = ((byte)(0x8 | arrayOfByte1[2]));
mmOutputStream.write(format);
mmOutputStream.write(msg.toString().getBytes(),0,msg.toString().getBytes().length);
// tell the user data were sent
myLabel.setText("Data sent.");
} catch (Exception e) {
e.printStackTrace();
}
}
// this will find a bluetooth printer device
void findBT() {
try {
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if(mBluetoothAdapter == null) {
myLabel.setText("No bluetooth adapter available");
}
if(!mBluetoothAdapter.isEnabled()) {
Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBluetooth, 0);
}
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
if(pairedDevices.size() > 0) {
for (BluetoothDevice device : pairedDevices) {
// RPP300 is the name of the bluetooth printer device
// we got this name from the list of paired devices
if (device.getName().equals("TM-P20_002154")) {
mmDevice = device;
break;
}
}
}
myLabel.setText("Bluetooth device found.");
}catch(Exception e){
e.printStackTrace();
}
}
// tries to open a connection to the bluetooth printer device
void openBT() throws IOException {
try {
// Standard SerialPortService ID
UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
// UUID uuid = UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66");
mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid);
mmSocket.connect();
mmOutputStream = mmSocket.getOutputStream();
mmInputStream = mmSocket.getInputStream();
beginListenForData();
myLabel.setText("Bluetooth Opened");
} catch (Exception e) {
e.printStackTrace();
}
}
/*
* after opening a connection to bluetooth printer device,
* we have to listen and check if a data were sent to be printed.
*/
void beginListenForData() {
try {
final Handler handler = new Handler();
// this is the ASCII code for a newline character
final byte delimiter = 10;
stopWorker = false;
readBufferPosition = 0;
readBuffer = new byte[1024];
workerThread = new Thread(new Runnable() {
public void run() {
while (!Thread.currentThread().isInterrupted() && !stopWorker) {
try {
int bytesAvailable = mmInputStream.available();
if (bytesAvailable > 0) {
byte[] packetBytes = new byte[bytesAvailable];
mmInputStream.read(packetBytes);
for (int i = 0; i < bytesAvailable; i++) {
byte b = packetBytes[i];
if (b == delimiter) {
byte[] encodedBytes = new byte[readBufferPosition];
System.arraycopy(
readBuffer, 0,
encodedBytes, 0,
encodedBytes.length
);
// specify US-ASCII encoding
final String data = new String(encodedBytes, "US-ASCII");
readBufferPosition = 0;
// tell the user data were sent to bluetooth printer device
handler.post(new Runnable() {
public void run() {
myLabel.setText(data);
}
});
} else {
readBuffer[readBufferPosition++] = b;
}
}
}
} catch (IOException ex) {
stopWorker = true;
}
}
}
});
workerThread.start();
} catch (Exception e) {
e.printStackTrace();
}
}
}
公共类NewActivity扩展活动{
//将显示蓝牙打开、关闭或数据发送等状态
文本视图myLabel;
//将允许用户输入要打印的任何文本
编辑文本myTextbox;
//android内置蓝牙操作类
蓝牙适配器mBluetoothAdapter;
蓝牙插座;
蓝牙设备;
//需要与蓝牙设备/网络进行通信
输出流mmOutputStream;
输入流mmInputStream;
螺纹加工螺纹;
字节[]读取缓冲区;
int-readBufferPosition;
易变布尔工;
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.new_main);
试一试{
//更多的代码将在这里
}捕获(例外e){
e、 printStackTrace();
}
//我们将有三个按钮用于特定功能
按钮打开按钮=(按钮)findViewById(R.id.open);
按钮sendButton=(按钮)findViewById(R.id.send);
按钮关闭按钮=(按钮)findViewById(R.id.close);
//文本标签和输入框
myLabel=(TextView)findViewById(R.id.label);
myTextbox=(EditText)findViewById(R.id.entry);
//打开蓝牙连接
openButton.setOnClickListener(新视图.OnClickListener(){
公共void onClick(视图v){
试一试{
findBT();
openBT();
}捕获(IOEX异常){
例如printStackTrace();
}
}
});
//发送用户键入的要打印的数据
sendButton.setOnClickListener(新视图.OnClickListener(){
公共void onClick(视图v){
试一试{
sendData();
}捕获(IOEX异常){
例如printStackTrace();
}
}
});
//关闭蓝牙连接
closeButton.setOnClickListener(新视图.OnClickListener(){
公共void onClick(视图v){
试一试{
closeBT();
}捕获(IOEX异常){
例如printStackTrace();
}
}
});
}
//关闭与蓝牙打印机的连接。
void closeBT()引发IOException{
试一试{
stopWorker=true;
mmOutputStream.close();
mmInputStream.close();
mmSocket.close();
myLabel.setText(“蓝牙关闭”);
}捕获(例外e){
e、 printStackTrace();
}
}
//这将发送要由蓝牙打印机打印的文本数据
void sendData()引发IOException{
试一试{
span msg=Html.fromHtml(“我的第一个示例我的第一次打印。这是一个段落。”;
myTextbox.setText(msg,TextView.BufferType.SPANNABLE);
字节[]arrayOfByte1={27,33,0};
字节[]格式={27,33,0};
//大胆的
格式[2]=(字节)(0x8 | arrayOfByte1[2]);
mmOutputStream.write(格式);
mmOutputStream.write(msg.toString().getBytes(),0,msg.toString().getBytes().length);
//告诉用户数据已发送
setText(“已发送的数据”);
}捕获(例外e){
e、 printStackTrace();
}
}
//这将找到蓝牙打印机设备
void findBT(){
试一试{
mBluetoothAdapter=BluetoothAdapter.getDefaultAdapter();
if(mBluetoothAdapter==null){
myLabel.setText(“没有可用的蓝牙适配器”);
}
如果(!mBluetoothAdapter.isEnabled()){
意图启用Bluetooth=新意图(BluetoothAdapter.ACTION\u REQUEST\u ENABLE);
startActivityForResult(启用蓝牙,0);
}
设置pairedDevices=mBluetoothAdapter.getBondedDevices();
如果(pairedDevices.size()>0){
用于(蓝牙设备:pairedDevices){
//RPP300是蓝牙打印机设备的名称
//我们从配对设备列表中获取此名称
if(device.getName()等于(“TM-P20_002154”)){
mmDevice=设备;
打破
}
}
}
setText(“找到蓝牙设备”);
}捕获(例外e){
e、 printStackTrace();
}
}
//尝试打开与蓝牙打印机设备的连接
void openBT()引发IOException{
试一试{
//标准SerialPortService ID
UUID UUID=UUID.fromString(“000011101-0000-1000-8000-00805f9b34fb”);
//UUID UUID=UUID.fromString(“fa87c0d0-afac-11de-8a39-0800200c9a66”);
mmSocket=mmDevice.createRfcommSocketToServiceRecord(uuid);
mmSocket.connect();
mmOutputStream=mmSocket.getOutputStream();
mmInputStream=mmSocket.getInputStream();
beginListenForData();
myLabel.setText(“蓝牙打开”);
}捕获(例外e){
e、 printStackTrace();
}
}
/*
*打开与蓝牙打印机设备的连接后,
*我们必须倾听并检查是否发送了数据进行打印。
*/
void beginListenForData(){
试一试{
最终处理程序=新处理程序();
//这是换行符的ASCII码
最后一个字节分隔符=10;
stopWorker=false;
readBufferPosition=0;
readBuffer=新字节[1024];
workerThread=新线程(new Runnable()){
公开募捐{
而(!Thread.currentThread().isInterrupted()&&!stopWorker){
试一试{
int bytesavable=mmInputStream.available();
如果(字节可用>0){
byte[]packetBytes=新字节[bytesAvailable];
mmInputStream.read(packetBytes);
for(int i=0;i<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_margin="10dp" >
<TextView
android:id="@+id/label"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Type here:" />
<EditText
android:id="@+id/entry"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/label" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@id/entry" >
<Button
android:id="@+id/open"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dip"
android:text="Open" />
<Button
android:id="@+id/send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send" />
<Button
android:id="@+id/close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Close" />
</LinearLayout>