安卓手机连接蓝牙打印机实现打印功能

最近在做一个安卓应用，其中有一个需求是要求用蓝牙连接打印机实现打印功能。一开始没有一点头绪，网上找了很多资料也找不到有用的数据。所以自己就去研究，最终，功夫不负有心人，顺利的完成了这个功能。下边贴出我写的代码，共有需要的IT哥们参考学习。

完整源码下载

我们先看看运行效果图吧。。。

1.这是主界面的效果图

贴上布局文件的代码：bluetooth_layout.xml

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<span style="font-size:12px"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<Button
android:id="@+id/openBluetooth_tb"
android:layout_width="130dp"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginRight="18dp"
android:layout_marginTop="5dp"
android:text="打开蓝牙" />
<Button
android:id="@+id/searchDevices"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/openBluetooth_tb"
android:layout_marginTop="20dp"
android:text="搜索设备" />
<View
android:layout_width="match_parent"
android:layout_height="3dp"
android:layout_alignParentLeft="true"
android:layout_below="@+id/searchDevices"
android:background="@android:color/darker_gray" />
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_marginTop="125dp"
android:orientation="vertical" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="未配对设备" />
<ListView
android:id="@+id/unbondDevices"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="3dp"
android:layout_alignParentLeft="true"
android:layout_below="@+id/searchDevices"
android:layout_marginTop="160dp"
android:background="@android:color/darker_gray" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="190dp"
android:layout_marginTop="288dp"
android:orientation="vertical" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="已配对设备" />
<ListView
android:id="@+id/bondDevices"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/linearLayout1" >
</ListView>
</LinearLayout>
<Button
android:id="@+id/return_Bluetooth_btn"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_above="@+id/searchDevices"
android:layout_alignParentLeft="true"
android:text="返回" />
</RelativeLayout></span>

从上边的布局文件中不难看出，其中有两个ListView，OK，那下边贴出对应的两个item布局文件

--> 第一个item：unbonddevice_item.xml

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<span style="font-size:14px"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/device_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="未绑定设备"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout></span>

-->第二个item：bonddevice_item.xml

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<span style="font-size:14px"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/device_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="已绑定设备"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout></span>

2.还有另外一个布局文件，就是当点击已绑定蓝牙设备下边的某个item时进入打印的界面，不多说，看图！

代码如下：printdata_layout.xml

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<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<EditText
android:id="@+id/print_data"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="46dp" >
</EditText>
<TextView
android:id="@+id/device_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="16dp"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/connect_state"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/device_name"
android:layout_alignBottom="@+id/device_name"
android:layout_marginLeft="42dp"
android:layout_toRightOf="@+id/device_name"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="@+id/send"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/print_data"
android:layout_marginTop="21dp"
android:text="打印" />
<Button
android:id="@+id/command"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/send"
android:text="指令" />
</RelativeLayout>

至此，布局文件就搞定了，接下来就要编写java代码了。主要有一下这么几个类，一个一个来哈

BluetoothActivity.java

这个类的主要作用是初始化主界面，看代码

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public class BluetoothActivity extends Activity {
private Context context = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.context = this;
setTitle("蓝牙打印");
setContentView(R.layout.bluetooth_layout);
this.initListener();
}
private void initListener() {
ListView unbondDevices = (ListView) this
.findViewById(R.id.unbondDevices);
ListView bondDevices = (ListView) this.findViewById(R.id.bondDevices);
Button switchBT = (Button) this.findViewById(R.id.openBluetooth_tb);
Button searchDevices = (Button) this.findViewById(R.id.searchDevices);
BluetoothAction bluetoothAction = new BluetoothAction(this.context,
unbondDevices, bondDevices, switchBT, searchDevices,
BluetoothActivity.this);
Button returnButton = (Button) this
.findViewById(R.id.return_Bluetooth_btn);
bluetoothAction.setSearchDevices(searchDevices);
bluetoothAction.initView();
switchBT.setOnClickListener(bluetoothAction);
searchDevices.setOnClickListener(bluetoothAction);
returnButton.setOnClickListener(bluetoothAction);
}
//屏蔽返回键的代码:
public boolean onKeyDown(int keyCode,KeyEvent event)
{
switch(keyCode)
{
case KeyEvent.KEYCODE_BACK:return true;
}
return super.onKeyDown(keyCode, event);
}
}

BluetoothAction.java

这个类顾名思义，是处理bluetoothActivity中各种操作事件的action类，看代码

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<span style="font-size:14px">public class BluetoothAction implements OnClickListener {
private Button switchBT = null;
private Button searchDevices = null;
private Activity activity = null;
private ListView unbondDevices = null;
private ListView bondDevices = null;
private Context context = null;
private BluetoothService bluetoothService = null;
public BluetoothAction(Context context, ListView unbondDevices,
ListView bondDevices, Button switchBT, Button searchDevices,
Activity activity) {
super();
this.context = context;
this.unbondDevices = unbondDevices;
this.bondDevices = bondDevices;
this.switchBT = switchBT;
this.searchDevices = searchDevices;
this.activity = activity;
this.bluetoothService = new BluetoothService(this.context,
this.unbondDevices, this.bondDevices, this.switchBT,
this.searchDevices);
}
public void setSwitchBT(Button switchBT) {
this.switchBT = switchBT;
}
public void setSearchDevices(Button searchDevices) {
this.searchDevices = searchDevices;
}
public void setUnbondDevices(ListView unbondDevices) {
this.unbondDevices = unbondDevices;
}
/**
* 初始化界面
*/
public void initView() {
if (this.bluetoothService.isOpen()) {
System.out.println("蓝牙有开!");
switchBT.setText("关闭蓝牙");
}
if (!this.bluetoothService.isOpen()) {
System.out.println("蓝牙没开!");
this.searchDevices.setEnabled(false);
}
}
private void searchDevices() {
bluetoothService.searchDevices();
}
/**
* 各种按钮的监听
*/
@Override
public void onClick(View v) {
if (v.getId() == R.id.searchDevices) {
this.searchDevices();
} else if (v.getId() == R.id.return_Bluetooth_btn) {
activity.finish();
} else if (v.getId() == R.id.openBluetooth_tb) {
if (!this.bluetoothService.isOpen()) {
// 蓝牙关闭的情况
System.out.println("蓝牙关闭的情况");
this.bluetoothService.openBluetooth(activity);
} else {
// 蓝牙打开的情况
System.out.println("蓝牙打开的情况");
this.bluetoothService.closeBluetooth();
}
}
}
}</span>

这个类会把各种请求动作分门别类，交给BluetoothService.java来处理，看代码

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public class BluetoothService {
private Context context = null;
private BluetoothAdapter bluetoothAdapter = BluetoothAdapter
.getDefaultAdapter();
private ArrayList<BluetoothDevice> unbondDevices = null; // 用于存放未配对蓝牙设备
private ArrayList<BluetoothDevice> bondDevices = null;// 用于存放已配对蓝牙设备
private Button switchBT = null;
private Button searchDevices = null;
private ListView unbondDevicesListView = null;
private ListView bondDevicesListView = null;
/**
* 添加已绑定蓝牙设备到ListView
*/
private void addBondDevicesToListView() {
ArrayList<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();
int count = this.bondDevices.size();
System.out.println("已绑定设备数量：" + count);
for (int i = 0; i < count; i++) {
HashMap<String, Object> map = new HashMap<String, Object>();
map.put("deviceName", this.bondDevices.get(i).getName());
data.add(map);// 把item项的数据加到data中
}
String[] from = { "deviceName" };
int[] to = { R.id.device_name };
SimpleAdapter simpleAdapter = new SimpleAdapter(this.context, data,
R.layout.bonddevice_item, from, to);
// 把适配器装载到listView中
this.bondDevicesListView.setAdapter(simpleAdapter);
this.bondDevicesListView
.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
BluetoothDevice device = bondDevices.get(arg2);
Intent intent = new Intent();
intent.setClassName(context,
"com.lifeng.jdxt.view.PrintDataActivity");
intent.putExtra("deviceAddress", device.getAddress());
context.startActivity(intent);
}
});
}
/**
* 添加未绑定蓝牙设备到ListView
*/
private void addUnbondDevicesToListView() {
ArrayList<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();
int count = this.unbondDevices.size();
System.out.println("未绑定设备数量：" + count);
for (int i = 0; i < count; i++) {
HashMap<String, Object> map = new HashMap<String, Object>();
map.put("deviceName", this.unbondDevices.get(i).getName());
data.add(map);// 把item项的数据加到data中
}
String[] from = { "deviceName" };
int[] to = { R.id.device_name };
SimpleAdapter simpleAdapter = new SimpleAdapter(this.context, data,
R.layout.unbonddevice_item, from, to);
// 把适配器装载到listView中
this.unbondDevicesListView.setAdapter(simpleAdapter);
// 为每个item绑定监听，用于设备间的配对
this.unbondDevicesListView
.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
try {
Method createBondMethod = BluetoothDevice.class
.getMethod("createBond");
createBondMethod
.invoke(unbondDevices.get(arg2));
// 将绑定好的设备添加的已绑定list集合
bondDevices.add(unbondDevices.get(arg2));
// 将绑定好的设备从未绑定list集合中移除
unbondDevices.remove(arg2);
addBondDevicesToListView();
addUnbondDevicesToListView();
} catch (Exception e) {
Toast.makeText(context, "配对失败！", Toast.LENGTH_SHORT)
.show();
}
}
});
}
public BluetoothService(Context context, ListView unbondDevicesListView,
ListView bondDevicesListView, Button switchBT, Button searchDevices) {
this.context = context;
this.unbondDevicesListView = unbondDevicesListView;
this.bondDevicesListView = bondDevicesListView;
// this.bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
this.unbondDevices = new ArrayList<BluetoothDevice>();
this.bondDevices = new ArrayList<BluetoothDevice>();
this.switchBT = switchBT;
this.searchDevices = searchDevices;
this.initIntentFilter();
}
private void initIntentFilter() {
// 设置广播信息过滤
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(BluetoothDevice.ACTION_FOUND);
intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
// 注册广播接收器，接收并处理搜索结果
context.registerReceiver(receiver, intentFilter);
}
/**
* 打开蓝牙
*/
public void openBluetooth(Activity activity) {
Intent enableBtIntent = new Intent(
BluetoothAdapter.ACTION_REQUEST_ENABLE);
activity.startActivityForResult(enableBtIntent, 1);
}
/**
* 关闭蓝牙
*/
public void closeBluetooth() {
this.bluetoothAdapter.disable();
}
/**
* 判断蓝牙是否打开
*
* @return boolean
*/
public boolean isOpen() {
return this.bluetoothAdapter.isEnabled();
}
/**
* 搜索蓝牙设备
*/
public void searchDevices() {
this.bondDevices.clear();
this.unbondDevices.clear();
// 寻找蓝牙设备，android会将查找到的设备以广播形式发出去
this.bluetoothAdapter.startDiscovery();
}
/**
* 添加未绑定蓝牙设备到list集合
*
* @param device
*/
public void addUnbondDevices(BluetoothDevice device) {
System.out.println("未绑定设备名称：" + device.getName());
if (!this.unbondDevices.contains(device)) {
this.unbondDevices.add(device);
}
}
/**
* 添加已绑定蓝牙设备到list集合
*
* @param device
*/
public void addBandDevices(BluetoothDevice device) {
System.out.println("已绑定设备名称：" + device.getName());
if (!this.bondDevices.contains(device)) {
this.bondDevices.add(device);
}
}
/**
* 蓝牙广播接收器
*/
private BroadcastReceiver receiver = new BroadcastReceiver() {
ProgressDialog progressDialog = null;
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = intent
.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (device.getBondState() == BluetoothDevice.BOND_BONDED) {
addBandDevices(device);
} else {
addUnbondDevices(device);
}
} else if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
progressDialog = ProgressDialog.show(context, "请稍等...",
"搜索蓝牙设备中...", true);
} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED
.equals(action)) {
System.out.println("设备搜索完毕");
progressDialog.dismiss();
addUnbondDevicesToListView();
addBondDevicesToListView();
// bluetoothAdapter.cancelDiscovery();
}
if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_ON) {
System.out.println("--------打开蓝牙-----------");
switchBT.setText("关闭蓝牙");
searchDevices.setEnabled(true);
bondDevicesListView.setEnabled(true);
unbondDevicesListView.setEnabled(true);
} else if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_OFF) {
System.out.println("--------关闭蓝牙-----------");
switchBT.setText("打开蓝牙");
searchDevices.setEnabled(false);
bondDevicesListView.setEnabled(false);
unbondDevicesListView.setEnabled(false);
}
}
}
};
}

到这里，第一个界面的代码就写完了，当我们点击要打印的蓝牙设备时就会跳转到打印页面，跳转代码在BluetoothService.java的addBondDevicesToListView()中

接下来让我们来看看第二个界面的代码，结构和第一个界面的代码一样，分类三个类，请看代码。。。。。

PrintDataActivity.java

[java] view plain copy

public class PrintDataActivity extends Activity {
private Context context = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setTitle("蓝牙打印");
this.setContentView(R.layout.printdata_layout);
this.context = this;
this.initListener();
}
/**
* 获得从上一个Activity传来的蓝牙地址
* @return String
*/
private String getDeviceAddress() {
// 直接通过Context类的getIntent()即可获取Intent
Intent intent = this.getIntent();
// 判断
if (intent != null) {
return intent.getStringExtra("deviceAddress");
} else {
return null;
}
}
private void initListener() {
TextView deviceName = (TextView) this.findViewById(R.id.device_name);
TextView connectState = (TextView) this
.findViewById(R.id.connect_state);
PrintDataAction printDataAction = new PrintDataAction(this.context,
this.getDeviceAddress(), deviceName, connectState);
EditText printData = (EditText) this.findViewById(R.id.print_data);
Button send = (Button) this.findViewById(R.id.send);
Button command = (Button) this.findViewById(R.id.command);
printDataAction.setPrintData(printData);
send.setOnClickListener(printDataAction);
command.setOnClickListener(printDataAction);
}
@Override
protected void onDestroy() {
PrintDataService.disconnect();
super.onDestroy();
}
}

PrintDataAction.java

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<span style="font-size:14px">public class PrintDataAction implements OnClickListener {
private Context context = null;
private TextView deviceName = null;
private TextView connectState = null;
private EditText printData = null;
private String deviceAddress = null;
private PrintDataService printDataService = null;
public PrintDataAction(Context context, String deviceAddress,
TextView deviceName, TextView connectState) {
super();
this.context = context;
this.deviceAddress = deviceAddress;
this.deviceName = deviceName;
this.connectState = connectState;
this.printDataService = new PrintDataService(this.context,
this.deviceAddress);
this.initView();
}
private void initView() {
// 设置当前设备名称
this.deviceName.setText(this.printDataService.getDeviceName());
// 一上来就先连接蓝牙设备
boolean flag = this.printDataService.connect();
if (flag == false) {
// 连接失败
this.connectState.setText("连接失败！");
} else {
// 连接成功
this.connectState.setText("连接成功！");
}
}
public void setPrintData(EditText printData) {
this.printData = printData;
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.send) {
String sendData = this.printData.getText().toString();
this.printDataService.send(sendData + "\n");
} else if (v.getId() == R.id.command) {
this.printDataService.selectCommand();
}
}
}</span>

PrintDataService.java

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<span style="font-size:14px">public class PrintDataService {
private Context context = null;
private String deviceAddress = null;
private BluetoothAdapter bluetoothAdapter = BluetoothAdapter
.getDefaultAdapter();
private BluetoothDevice device = null;
private static BluetoothSocket bluetoothSocket = null;
private static OutputStream outputStream = null;
private static final UUID uuid = UUID
.fromString("00001101-0000-1000-8000-00805F9B34FB");
private boolean isConnection = false;
final String[] items = { "复位打印机", "标准ASCII字体", "压缩ASCII字体", "字体不放大",
"宽高加倍", "取消加粗模式", "选择加粗模式", "取消倒置打印", "选择倒置打印", "取消黑白反显", "选择黑白反显",
"取消顺时针旋转90°", "选择顺时针旋转90°" };
final byte[][] byteCommands = { { 0x1b, 0x40 },// 复位打印机
{ 0x1b, 0x4d, 0x00 },// 标准ASCII字体
{ 0x1b, 0x4d, 0x01 },// 压缩ASCII字体
{ 0x1d, 0x21, 0x00 },// 字体不放大
{ 0x1d, 0x21, 0x11 },// 宽高加倍
{ 0x1b, 0x45, 0x00 },// 取消加粗模式
{ 0x1b, 0x45, 0x01 },// 选择加粗模式
{ 0x1b, 0x7b, 0x00 },// 取消倒置打印
{ 0x1b, 0x7b, 0x01 },// 选择倒置打印
{ 0x1d, 0x42, 0x00 },// 取消黑白反显
{ 0x1d, 0x42, 0x01 },// 选择黑白反显
{ 0x1b, 0x56, 0x00 },// 取消顺时针旋转90°
{ 0x1b, 0x56, 0x01 },// 选择顺时针旋转90°
};
public PrintDataService(Context context, String deviceAddress) {
super();
this.context = context;
this.deviceAddress = deviceAddress;
this.device = this.bluetoothAdapter.getRemoteDevice(this.deviceAddress);
}
/**
* 获取设备名称
*
* @return String
*/
public String getDeviceName() {
return this.device.getName();
}
/**
* 连接蓝牙设备
*/
public boolean connect() {
if (!this.isConnection) {
try {
bluetoothSocket = this.device
.createRfcommSocketToServiceRecord(uuid);
bluetoothSocket.connect();
outputStream = bluetoothSocket.getOutputStream();
this.isConnection = true;
if (this.bluetoothAdapter.isDiscovering()) {
System.out.println("关闭适配器！");
this.bluetoothAdapter.isDiscovering();
}
} catch (Exception e) {
Toast.makeText(this.context, "连接失败！", 1).show();
return false;
}
Toast.makeText(this.context, this.device.getName() + "连接成功！",
Toast.LENGTH_SHORT).show();
return true;
} else {
return true;
}
}
/**
* 断开蓝牙设备连接
*/
public static void disconnect() {
System.out.println("断开蓝牙设备连接");
try {
bluetoothSocket.close();
outputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 选择指令
*/
public void selectCommand() {
new AlertDialog.Builder(context).setTitle("请选择指令")
.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
try {
outputStream.write(byteCommands[which]);
} catch (IOException e) {
Toast.makeText(context, "设置指令失败！",
Toast.LENGTH_SHORT).show();
}
}
}).create().show();
}
/**
* 发送数据
*/
public void send(String sendData) {
if (this.isConnection) {
System.out.println("开始打印！！");
try {
byte[] data = sendData.getBytes("gbk");
outputStream.write(data, 0, data.length);
outputStream.flush();
} catch (IOException e) {
Toast.makeText(this.context, "发送失败！", Toast.LENGTH_SHORT)
.show();
}
} else {
Toast.makeText(this.context, "设备未连接，请重新连接！", Toast.LENGTH_SHORT)
.show();
}
}
}</span>

到此，全部代码贴完，也就大功告成了

对了对了，差点忘记一件很重要的事情！！清单文件忘记给权限啦！！

权限

[html] view plain copy

<span style="font-size:14px"><uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" /> </span>

注册Activity

[html] view plain copy

<span style="font-size:14px"><activity android:name=".BluetoothActivity" />
<activity android:name=".PrintDataActivity" /> </span><span style="font-size:14px">
</span>

这下子就真的搞定了！

完整源码下载

我们先看看运行效果图吧。。。

1.这是主界面的效果图

贴上布局文件的代码：bluetooth_layout.xml

[html] view plain copy

<span style="font-size:12px"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<Button
android:id="@+id/openBluetooth_tb"
android:layout_width="130dp"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginRight="18dp"
android:layout_marginTop="5dp"
android:text="打开蓝牙" />
<Button
android:id="@+id/searchDevices"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/openBluetooth_tb"
android:layout_marginTop="20dp"
android:text="搜索设备" />
<View
android:layout_width="match_parent"
android:layout_height="3dp"
android:layout_alignParentLeft="true"
android:layout_below="@+id/searchDevices"
android:background="@android:color/darker_gray" />
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_marginTop="125dp"
android:orientation="vertical" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="未配对设备" />
<ListView
android:id="@+id/unbondDevices"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="3dp"
android:layout_alignParentLeft="true"
android:layout_below="@+id/searchDevices"
android:layout_marginTop="160dp"
android:background="@android:color/darker_gray" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="190dp"
android:layout_marginTop="288dp"
android:orientation="vertical" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="已配对设备" />
<ListView
android:id="@+id/bondDevices"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/linearLayout1" >
</ListView>
</LinearLayout>
<Button
android:id="@+id/return_Bluetooth_btn"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_above="@+id/searchDevices"
android:layout_alignParentLeft="true"
android:text="返回" />
</RelativeLayout></span>

从上边的布局文件中不难看出，其中有两个ListView，OK，那下边贴出对应的两个item布局文件

--> 第一个item：unbonddevice_item.xml

[html] view plain copy

<span style="font-size:14px"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/device_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="未绑定设备"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout></span>

-->第二个item：bonddevice_item.xml

[html] view plain copy

<span style="font-size:14px"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/device_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="已绑定设备"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout></span>

2.还有另外一个布局文件，就是当点击已绑定蓝牙设备下边的某个item时进入打印的界面，不多说，看图！

代码如下：printdata_layout.xml

[html] view plain copy

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<EditText
android:id="@+id/print_data"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="46dp" >
</EditText>
<TextView
android:id="@+id/device_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="16dp"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/connect_state"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/device_name"
android:layout_alignBottom="@+id/device_name"
android:layout_marginLeft="42dp"
android:layout_toRightOf="@+id/device_name"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="@+id/send"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/print_data"
android:layout_marginTop="21dp"
android:text="打印" />
<Button
android:id="@+id/command"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/send"
android:text="指令" />
</RelativeLayout>

至此，布局文件就搞定了，接下来就要编写java代码了。主要有一下这么几个类，一个一个来哈

BluetoothActivity.java

这个类的主要作用是初始化主界面，看代码

[java] view plain copy

public class BluetoothActivity extends Activity {
private Context context = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.context = this;
setTitle("蓝牙打印");
setContentView(R.layout.bluetooth_layout);
this.initListener();
}
private void initListener() {
ListView unbondDevices = (ListView) this
.findViewById(R.id.unbondDevices);
ListView bondDevices = (ListView) this.findViewById(R.id.bondDevices);
Button switchBT = (Button) this.findViewById(R.id.openBluetooth_tb);
Button searchDevices = (Button) this.findViewById(R.id.searchDevices);
BluetoothAction bluetoothAction = new BluetoothAction(this.context,
unbondDevices, bondDevices, switchBT, searchDevices,
BluetoothActivity.this);
Button returnButton = (Button) this
.findViewById(R.id.return_Bluetooth_btn);
bluetoothAction.setSearchDevices(searchDevices);
bluetoothAction.initView();
switchBT.setOnClickListener(bluetoothAction);
searchDevices.setOnClickListener(bluetoothAction);
returnButton.setOnClickListener(bluetoothAction);
}
//屏蔽返回键的代码:
public boolean onKeyDown(int keyCode,KeyEvent event)
{
switch(keyCode)
{
case KeyEvent.KEYCODE_BACK:return true;
}
return super.onKeyDown(keyCode, event);
}
}

BluetoothAction.java

这个类顾名思义，是处理bluetoothActivity中各种操作事件的action类，看代码

[java] view plain copy

<span style="font-size:14px">public class BluetoothAction implements OnClickListener {
private Button switchBT = null;
private Button searchDevices = null;
private Activity activity = null;
private ListView unbondDevices = null;
private ListView bondDevices = null;
private Context context = null;
private BluetoothService bluetoothService = null;
public BluetoothAction(Context context, ListView unbondDevices,
ListView bondDevices, Button switchBT, Button searchDevices,
Activity activity) {
super();
this.context = context;
this.unbondDevices = unbondDevices;
this.bondDevices = bondDevices;
this.switchBT = switchBT;
this.searchDevices = searchDevices;
this.activity = activity;
this.bluetoothService = new BluetoothService(this.context,
this.unbondDevices, this.bondDevices, this.switchBT,
this.searchDevices);
}
public void setSwitchBT(Button switchBT) {
this.switchBT = switchBT;
}
public void setSearchDevices(Button searchDevices) {
this.searchDevices = searchDevices;
}
public void setUnbondDevices(ListView unbondDevices) {
this.unbondDevices = unbondDevices;
}
/**
* 初始化界面
*/
public void initView() {
if (this.bluetoothService.isOpen()) {
System.out.println("蓝牙有开!");
switchBT.setText("关闭蓝牙");
}
if (!this.bluetoothService.isOpen()) {
System.out.println("蓝牙没开!");
this.searchDevices.setEnabled(false);
}
}
private void searchDevices() {
bluetoothService.searchDevices();
}
/**
* 各种按钮的监听
*/
@Override
public void onClick(View v) {
if (v.getId() == R.id.searchDevices) {
this.searchDevices();
} else if (v.getId() == R.id.return_Bluetooth_btn) {
activity.finish();
} else if (v.getId() == R.id.openBluetooth_tb) {
if (!this.bluetoothService.isOpen()) {
// 蓝牙关闭的情况
System.out.println("蓝牙关闭的情况");
this.bluetoothService.openBluetooth(activity);
} else {
// 蓝牙打开的情况
System.out.println("蓝牙打开的情况");
this.bluetoothService.closeBluetooth();
}
}
}
}</span>

这个类会把各种请求动作分门别类，交给BluetoothService.java来处理，看代码

[java] view plain copy

public class BluetoothService {
private Context context = null;
private BluetoothAdapter bluetoothAdapter = BluetoothAdapter
.getDefaultAdapter();
private ArrayList<BluetoothDevice> unbondDevices = null; // 用于存放未配对蓝牙设备
private ArrayList<BluetoothDevice> bondDevices = null;// 用于存放已配对蓝牙设备
private Button switchBT = null;
private Button searchDevices = null;
private ListView unbondDevicesListView = null;
private ListView bondDevicesListView = null;
/**
* 添加已绑定蓝牙设备到ListView
*/
private void addBondDevicesToListView() {
ArrayList<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();
int count = this.bondDevices.size();
System.out.println("已绑定设备数量：" + count);
for (int i = 0; i < count; i++) {
HashMap<String, Object> map = new HashMap<String, Object>();
map.put("deviceName", this.bondDevices.get(i).getName());
data.add(map);// 把item项的数据加到data中
}
String[] from = { "deviceName" };
int[] to = { R.id.device_name };
SimpleAdapter simpleAdapter = new SimpleAdapter(this.context, data,
R.layout.bonddevice_item, from, to);
// 把适配器装载到listView中
this.bondDevicesListView.setAdapter(simpleAdapter);
this.bondDevicesListView
.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
BluetoothDevice device = bondDevices.get(arg2);
Intent intent = new Intent();
intent.setClassName(context,
"com.lifeng.jdxt.view.PrintDataActivity");
intent.putExtra("deviceAddress", device.getAddress());
context.startActivity(intent);
}
});
}
/**
* 添加未绑定蓝牙设备到ListView
*/
private void addUnbondDevicesToListView() {
ArrayList<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();
int count = this.unbondDevices.size();
System.out.println("未绑定设备数量：" + count);
for (int i = 0; i < count; i++) {
HashMap<String, Object> map = new HashMap<String, Object>();
map.put("deviceName", this.unbondDevices.get(i).getName());
data.add(map);// 把item项的数据加到data中
}
String[] from = { "deviceName" };
int[] to = { R.id.device_name };
SimpleAdapter simpleAdapter = new SimpleAdapter(this.context, data,
R.layout.unbonddevice_item, from, to);
// 把适配器装载到listView中
this.unbondDevicesListView.setAdapter(simpleAdapter);
// 为每个item绑定监听，用于设备间的配对
this.unbondDevicesListView
.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
try {
Method createBondMethod = BluetoothDevice.class
.getMethod("createBond");
createBondMethod
.invoke(unbondDevices.get(arg2));
// 将绑定好的设备添加的已绑定list集合
bondDevices.add(unbondDevices.get(arg2));
// 将绑定好的设备从未绑定list集合中移除
unbondDevices.remove(arg2);
addBondDevicesToListView();
addUnbondDevicesToListView();
} catch (Exception e) {
Toast.makeText(context, "配对失败！", Toast.LENGTH_SHORT)
.show();
}
}
});
}
public BluetoothService(Context context, ListView unbondDevicesListView,
ListView bondDevicesListView, Button switchBT, Button searchDevices) {
this.context = context;
this.unbondDevicesListView = unbondDevicesListView;
this.bondDevicesListView = bondDevicesListView;
// this.bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
this.unbondDevices = new ArrayList<BluetoothDevice>();
this.bondDevices = new ArrayList<BluetoothDevice>();
this.switchBT = switchBT;
this.searchDevices = searchDevices;
this.initIntentFilter();
}
private void initIntentFilter() {
// 设置广播信息过滤
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(BluetoothDevice.ACTION_FOUND);
intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
// 注册广播接收器，接收并处理搜索结果
context.registerReceiver(receiver, intentFilter);
}
/**
* 打开蓝牙
*/
public void openBluetooth(Activity activity) {
Intent enableBtIntent = new Intent(
BluetoothAdapter.ACTION_REQUEST_ENABLE);
activity.startActivityForResult(enableBtIntent, 1);
}
/**
* 关闭蓝牙
*/
public void closeBluetooth() {
this.bluetoothAdapter.disable();
}
/**
* 判断蓝牙是否打开
*
* @return boolean
*/
public boolean isOpen() {
return this.bluetoothAdapter.isEnabled();
}
/**
* 搜索蓝牙设备
*/
public void searchDevices() {
this.bondDevices.clear();
this.unbondDevices.clear();
// 寻找蓝牙设备，android会将查找到的设备以广播形式发出去
this.bluetoothAdapter.startDiscovery();
}
/**
* 添加未绑定蓝牙设备到list集合
*
* @param device
*/
public void addUnbondDevices(BluetoothDevice device) {
System.out.println("未绑定设备名称：" + device.getName());
if (!this.unbondDevices.contains(device)) {
this.unbondDevices.add(device);
}
}
/**
* 添加已绑定蓝牙设备到list集合
*
* @param device
*/
public void addBandDevices(BluetoothDevice device) {
System.out.println("已绑定设备名称：" + device.getName());
if (!this.bondDevices.contains(device)) {
this.bondDevices.add(device);
}
}
/**
* 蓝牙广播接收器
*/
private BroadcastReceiver receiver = new BroadcastReceiver() {
ProgressDialog progressDialog = null;
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = intent
.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (device.getBondState() == BluetoothDevice.BOND_BONDED) {
addBandDevices(device);
} else {
addUnbondDevices(device);
}
} else if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
progressDialog = ProgressDialog.show(context, "请稍等...",
"搜索蓝牙设备中...", true);
} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED
.equals(action)) {
System.out.println("设备搜索完毕");
progressDialog.dismiss();
addUnbondDevicesToListView();
addBondDevicesToListView();
// bluetoothAdapter.cancelDiscovery();
}
if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_ON) {
System.out.println("--------打开蓝牙-----------");
switchBT.setText("关闭蓝牙");
searchDevices.setEnabled(true);
bondDevicesListView.setEnabled(true);
unbondDevicesListView.setEnabled(true);
} else if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_OFF) {
System.out.println("--------关闭蓝牙-----------");
switchBT.setText("打开蓝牙");
searchDevices.setEnabled(false);
bondDevicesListView.setEnabled(false);
unbondDevicesListView.setEnabled(false);
}
}
}
};
}

到这里，第一个界面的代码就写完了，当我们点击要打印的蓝牙设备时就会跳转到打印页面，跳转代码在BluetoothService.java的addBondDevicesToListView()中

接下来让我们来看看第二个界面的代码，结构和第一个界面的代码一样，分类三个类，请看代码。。。。。

PrintDataActivity.java

[java] view plain copy

public class PrintDataActivity extends Activity {
private Context context = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setTitle("蓝牙打印");
this.setContentView(R.layout.printdata_layout);
this.context = this;
this.initListener();
}
/**
* 获得从上一个Activity传来的蓝牙地址
* @return String
*/
private String getDeviceAddress() {
// 直接通过Context类的getIntent()即可获取Intent
Intent intent = this.getIntent();
// 判断
if (intent != null) {
return intent.getStringExtra("deviceAddress");
} else {
return null;
}
}
private void initListener() {
TextView deviceName = (TextView) this.findViewById(R.id.device_name);
TextView connectState = (TextView) this
.findViewById(R.id.connect_state);
PrintDataAction printDataAction = new PrintDataAction(this.context,
this.getDeviceAddress(), deviceName, connectState);
EditText printData = (EditText) this.findViewById(R.id.print_data);
Button send = (Button) this.findViewById(R.id.send);
Button command = (Button) this.findViewById(R.id.command);
printDataAction.setPrintData(printData);
send.setOnClickListener(printDataAction);
command.setOnClickListener(printDataAction);
}
@Override
protected void onDestroy() {
PrintDataService.disconnect();
super.onDestroy();
}
}

PrintDataAction.java

[java] view plain copy

<span style="font-size:14px">public class PrintDataAction implements OnClickListener {
private Context context = null;
private TextView deviceName = null;
private TextView connectState = null;
private EditText printData = null;
private String deviceAddress = null;
private PrintDataService printDataService = null;
public PrintDataAction(Context context, String deviceAddress,
TextView deviceName, TextView connectState) {
super();
this.context = context;
this.deviceAddress = deviceAddress;
this.deviceName = deviceName;
this.connectState = connectState;
this.printDataService = new PrintDataService(this.context,
this.deviceAddress);
this.initView();
}
private void initView() {
// 设置当前设备名称
this.deviceName.setText(this.printDataService.getDeviceName());
// 一上来就先连接蓝牙设备
boolean flag = this.printDataService.connect();
if (flag == false) {
// 连接失败
this.connectState.setText("连接失败！");
} else {
// 连接成功
this.connectState.setText("连接成功！");
}
}
public void setPrintData(EditText printData) {
this.printData = printData;
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.send) {
String sendData = this.printData.getText().toString();
this.printDataService.send(sendData + "\n");
} else if (v.getId() == R.id.command) {
this.printDataService.selectCommand();
}
}
}</span>

PrintDataService.java

[java] view plain copy

<span style="font-size:14px">public class PrintDataService {
private Context context = null;
private String deviceAddress = null;
private BluetoothAdapter bluetoothAdapter = BluetoothAdapter
.getDefaultAdapter();
private BluetoothDevice device = null;
private static BluetoothSocket bluetoothSocket = null;
private static OutputStream outputStream = null;
private static final UUID uuid = UUID
.fromString("00001101-0000-1000-8000-00805F9B34FB");
private boolean isConnection = false;
final String[] items = { "复位打印机", "标准ASCII字体", "压缩ASCII字体", "字体不放大",
"宽高加倍", "取消加粗模式", "选择加粗模式", "取消倒置打印", "选择倒置打印", "取消黑白反显", "选择黑白反显",
"取消顺时针旋转90°", "选择顺时针旋转90°" };
final byte[][] byteCommands = { { 0x1b, 0x40 },// 复位打印机
{ 0x1b, 0x4d, 0x00 },// 标准ASCII字体
{ 0x1b, 0x4d, 0x01 },// 压缩ASCII字体
{ 0x1d, 0x21, 0x00 },// 字体不放大
{ 0x1d, 0x21, 0x11 },// 宽高加倍
{ 0x1b, 0x45, 0x00 },// 取消加粗模式
{ 0x1b, 0x45, 0x01 },// 选择加粗模式
{ 0x1b, 0x7b, 0x00 },// 取消倒置打印
{ 0x1b, 0x7b, 0x01 },// 选择倒置打印
{ 0x1d, 0x42, 0x00 },// 取消黑白反显
{ 0x1d, 0x42, 0x01 },// 选择黑白反显
{ 0x1b, 0x56, 0x00 },// 取消顺时针旋转90°
{ 0x1b, 0x56, 0x01 },// 选择顺时针旋转90°
};
public PrintDataService(Context context, String deviceAddress) {
super();
this.context = context;
this.deviceAddress = deviceAddress;
this.device = this.bluetoothAdapter.getRemoteDevice(this.deviceAddress);
}
/**
* 获取设备名称
*
* @return String
*/
public String getDeviceName() {
return this.device.getName();
}
/**
* 连接蓝牙设备
*/
public boolean connect() {
if (!this.isConnection) {
try {
bluetoothSocket = this.device
.createRfcommSocketToServiceRecord(uuid);
bluetoothSocket.connect();
outputStream = bluetoothSocket.getOutputStream();
this.isConnection = true;
if (this.bluetoothAdapter.isDiscovering()) {
System.out.println("关闭适配器！");
this.bluetoothAdapter.isDiscovering();
}
} catch (Exception e) {
Toast.makeText(this.context, "连接失败！", 1).show();
return false;
}
Toast.makeText(this.context, this.device.getName() + "连接成功！",
Toast.LENGTH_SHORT).show();
return true;
} else {
return true;
}
}
/**
* 断开蓝牙设备连接
*/
public static void disconnect() {
System.out.println("断开蓝牙设备连接");
try {
bluetoothSocket.close();
outputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 选择指令
*/
public void selectCommand() {
new AlertDialog.Builder(context).setTitle("请选择指令")
.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
try {
outputStream.write(byteCommands[which]);
} catch (IOException e) {
Toast.makeText(context, "设置指令失败！",
Toast.LENGTH_SHORT).show();
}
}
}).create().show();
}
/**
* 发送数据
*/
public void send(String sendData) {
if (this.isConnection) {
System.out.println("开始打印！！");
try {
byte[] data = sendData.getBytes("gbk");
outputStream.write(data, 0, data.length);
outputStream.flush();
} catch (IOException e) {
Toast.makeText(this.context, "发送失败！", Toast.LENGTH_SHORT)
.show();
}
} else {
Toast.makeText(this.context, "设备未连接，请重新连接！", Toast.LENGTH_SHORT)
.show();
}
}
}</span>

到此，全部代码贴完，也就大功告成了

对了对了，差点忘记一件很重要的事情！！清单文件忘记给权限啦！！

权限

[html] view plain copy

<span style="font-size:14px"><uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" /> </span>

注册Activity

[html] view plain copy

<span style="font-size:14px"><activity android:name=".BluetoothActivity" />
<activity android:name=".PrintDataActivity" /> </span><span style="font-size:14px">
</span>

这下子就真的搞定了！

来源：https://www.cnblogs.com/westsoft/p/8437699.html

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