安卓手机连接蓝牙打印机实现打印功能

Posted 2020-10-24 westsoft

 

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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1. <span style="font-size:12px"><?xml version="1.0" encoding="utf-8"?>  
2. <RelativeLayout  
3.     android:layout_width="match_parent"  
4.     android:layout_height="match_parent" >  
5.   
6.     <Button  
7.         android:id="@+id/openBluetooth_tb"  
8.         android:layout_width="130dp"  
9.         android:layout_height="wrap_content"  
10.         android:layout_alignParentRight="true"  
11.         android:layout_marginRight="18dp"  
12.         android:layout_marginTop="5dp"  
13.         android:text="打开蓝牙" />  
14.   
15.     <Button  
16.         android:id="@+id/searchDevices"  
17.         android:layout_width="match_parent"  
18.         android:layout_height="wrap_content"  
19.         android:layout_alignParentLeft="true"  
20.         android:layout_below="@+id/openBluetooth_tb"  
21.         android:layout_marginTop="20dp"  
22.         android:text="搜索设备" />  
23.   
24.     <View  
25.         android:layout_width="match_parent"  
26.         android:layout_height="3dp"  
27.         android:layout_alignParentLeft="true"  
28.         android:layout_below="@+id/searchDevices"  
29.         android:background="@android:color/darker_gray" />  
30.   
31.     <LinearLayout  
32.         android:id="@+id/linearLayout1"  
33.         android:layout_width="match_parent"  
34.         android:layout_height="150dp"  
35.         android:layout_marginTop="125dp"  
36.         android:orientation="vertical" >  
37.   
38.         <TextView  
39.             android:layout_width="match_parent"  
40.             android:layout_height="wrap_content"  
41.             android:text="未配对设备" />  
42.   
43.         <ListView  
44.             android:id="@+id/unbondDevices"  
45.             android:layout_width="wrap_content"  
46.             android:layout_height="wrap_content" />  
47.     </LinearLayout>  
48.   
49.     <View  
50.         android:layout_width="match_parent"  
51.         android:layout_height="3dp"  
52.         android:layout_alignParentLeft="true"  
53.         android:layout_below="@+id/searchDevices"  
54.         android:layout_marginTop="160dp"  
55.         android:background="@android:color/darker_gray" />  
56.   
57.     <LinearLayout  
58.         android:layout_width="match_parent"  
59.         android:layout_height="190dp"  
60.         android:layout_marginTop="288dp"  
61.         android:orientation="vertical" >  
62.   
63.         <TextView  
64.             android:layout_width="match_parent"  
65.             android:layout_height="wrap_content"  
66.             android:text="已配对设备" />  
67.           <ListView  
68.             android:id="@+id/bondDevices"  
69.             android:layout_width="wrap_content"  
70.            android:layout_height="wrap_content"  
71.            android:layout_alignParentLeft="true"  
72.            android:layout_below="@+id/linearLayout1" >  
73.          </ListView>  
74.     </LinearLayout>  
75.   
76.     <Button  
77.         android:id="@+id/return_Bluetooth_btn"  
78.         android:layout_width="100dp"  
79.         android:layout_height="wrap_content"  
80.         android:layout_above="@+id/searchDevices"  
81.         android:layout_alignParentLeft="true"  
82.         android:text="返回" />  
83.   
84. </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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1. <span style="font-size:14px"><?xml version="1.0" encoding="utf-8"?>    
2. <RelativeLayout  
3.     android:layout_width="match_parent"    
4.     android:layout_height="match_parent" >    
5.     
6.     <TextView    
7.         android:id="@+id/device_name"    
8.         android:layout_width="match_parent"    
9.         android:layout_height="wrap_content"    
10.         android:layout_alignParentLeft="true"    
11.         android:layout_alignParentTop="true"    
12.         android:text="未绑定设备"    
13.         android:textAppearance="?android:attr/textAppearanceLarge" />    
14.     
15. </RelativeLayout></span>  

-->第二个item：bonddevice_item.xml

 

 

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1. <span style="font-size:14px"><?xml version="1.0" encoding="utf-8"?>    
2. <RelativeLayout  
3.     android:layout_width="match_parent"    
4.     android:layout_height="match_parent" >    
5.     
6.     <TextView    
7.         android:id="@+id/device_name"    
8.         android:layout_width="match_parent"    
9.         android:layout_height="wrap_content"    
10.         android:layout_alignParentLeft="true"    
11.         android:layout_alignParentTop="true"    
12.         android:text="已绑定设备"    
13.         android:textAppearance="?android:attr/textAppearanceLarge" />    
14.     
15. </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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1. <?xml version="1.0" encoding="utf-8"?>    
2. <RelativeLayout    
3.     android:layout_width="match_parent"    
4.     android:layout_height="match_parent" >    
5.     
6.     <EditText    
7.         android:id="@+id/print_data"    
8.         android:layout_width="match_parent"    
9.         android:layout_height="200dp"    
10.         android:layout_alignParentLeft="true"    
11.         android:layout_alignParentTop="true"    
12.         android:layout_marginTop="46dp" >    
13.     </EditText>    
14.     
15.     <TextView    
16.         android:id="@+id/device_name"    
17.         android:layout_width="wrap_content"    
18.         android:layout_height="wrap_content"    
19.         android:layout_alignParentLeft="true"    
20.         android:layout_alignParentTop="true"    
21.         android:layout_marginTop="16dp"    
22.         android:text="Large Text"    
23.         android:textAppearance="?android:attr/textAppearanceLarge" />    
24.     
25.     <TextView    
26.         android:id="@+id/connect_state"    
27.         android:layout_width="wrap_content"    
28.         android:layout_height="wrap_content"    
29.         android:layout_alignBaseline="@+id/device_name"    
30.         android:layout_alignBottom="@+id/device_name"    
31.         android:layout_marginLeft="42dp"    
32.         android:layout_toRightOf="@+id/device_name"    
33.         android:text="Large Text"    
34.         android:textAppearance="?android:attr/textAppearanceLarge" />    
35.     
36.     <Button    
37.         android:id="@+id/send"    
38.         android:layout_width="match_parent"    
39.         android:layout_height="wrap_content"    
40.         android:layout_alignParentLeft="true"    
41.         android:layout_below="@+id/print_data"    
42.         android:layout_marginTop="21dp"    
43.         android:text="打印" />    
44.     
45.     <Button    
46.         android:id="@+id/command"    
47.         android:layout_width="match_parent"    
48.         android:layout_height="wrap_content"    
49.         android:layout_alignParentLeft="true"    
50.         android:layout_below="@+id/send"    
51.         android:text="指令" />    
52.         
53. </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 plaincopy

 

1. public class BluetoothActivity extends Activity {    
2.     private Context context = null;    
3.     
4.     public void onCreate(Bundle savedInstanceState) {    
5.         super.onCreate(savedInstanceState);    
6.         this.context = this;    
7.         setTitle("蓝牙打印");    
8.         setContentView(R.layout.bluetooth_layout);    
9.         this.initListener();    
10.     }    
11.     
12.     private void initListener() {    
13.         ListView unbondDevices = (ListView) this    
14.                 .findViewById(R.id.unbondDevices);    
15.         ListView bondDevices = (ListView) this.findViewById(R.id.bondDevices);    
16.         Button switchBT = (Button) this.findViewById(R.id.openBluetooth_tb);    
17.         Button searchDevices = (Button) this.findViewById(R.id.searchDevices);    
18.     
19.         BluetoothAction bluetoothAction = new BluetoothAction(this.context,    
20.                 unbondDevices, bondDevices, switchBT, searchDevices,    
21.                 BluetoothActivity.this);    
22.     
23.         Button returnButton = (Button) this    
24.                 .findViewById(R.id.return_Bluetooth_btn);    
25.         bluetoothAction.setSearchDevices(searchDevices);    
26.         bluetoothAction.initView();    
27.     
28.         switchBT.setOnClickListener(bluetoothAction);    
29.         searchDevices.setOnClickListener(bluetoothAction);    
30.         returnButton.setOnClickListener(bluetoothAction);    
31.     }    
32.     //屏蔽返回键的代码:    
33.     public boolean onKeyDown(int keyCode,KeyEvent event)    
34.     {    
35.         switch(keyCode)    
36.         {    
37.             case KeyEvent.KEYCODE_BACK:return true;    
38.         }    
39.         return super.onKeyDown(keyCode, event);    
40.     }    
41. }  

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 plaincopy

 

1. <span style="font-size:14px">public class BluetoothAction implements OnClickListener {    
2.     
3.     private Button switchBT = null;    
4.     private Button searchDevices = null;    
5.     private Activity activity = null;    
6.     
7.     private ListView unbondDevices = null;    
8.     private ListView bondDevices = null;    
9.     private Context context = null;    
10.     private BluetoothService bluetoothService = null;    
11.     
12.     public BluetoothAction(Context context, ListView unbondDevices,    
13.             ListView bondDevices, Button switchBT, Button searchDevices,    
14.             Activity activity) {    
15.         super();    
16.         this.context = context;    
17.         this.unbondDevices = unbondDevices;    
18.         this.bondDevices = bondDevices;    
19.         this.switchBT = switchBT;    
20.         this.searchDevices = searchDevices;    
21.         this.activity = activity;    
22.         this.bluetoothService = new BluetoothService(this.context,    
23.                 this.unbondDevices, this.bondDevices, this.switchBT,    
24.                 this.searchDevices);    
25.     }    
26.     
27.     public void setSwitchBT(Button switchBT) {    
28.         this.switchBT = switchBT;    
29.     }    
30.     
31.     public void setSearchDevices(Button searchDevices) {    
32.         this.searchDevices = searchDevices;    
33.     }    
34.     
35.     public void setUnbondDevices(ListView unbondDevices) {    
36.         this.unbondDevices = unbondDevices;    
37.     }    
38.     
39.     /**  
40.      * 初始化界面  
41.      */    
42.     public void initView() {    
43.     
44.         if (this.bluetoothService.isOpen()) {    
45.             System.out.println("蓝牙有开!");    
46.             switchBT.setText("关闭蓝牙");    
47.         }    
48.         if (!this.bluetoothService.isOpen()) {    
49.             System.out.println("蓝牙没开!");    
50.             this.searchDevices.setEnabled(false);    
51.         }    
52.     }    
53.     
54.     private void searchDevices() {    
55.         bluetoothService.searchDevices();    
56.     }    
57.     
58.     /**  
59.      * 各种按钮的监听  
60.      */    
61.     @Override    
62.     public void onClick(View v) {    
63.         if (v.getId() == R.id.searchDevices) {    
64.             this.searchDevices();    
65.         } else if (v.getId() == R.id.return_Bluetooth_btn) {    
66.             activity.finish();    
67.         } else if (v.getId() == R.id.openBluetooth_tb) {    
68.             if (!this.bluetoothService.isOpen()) {    
69.                 // 蓝牙关闭的情况    
70.                 System.out.println("蓝牙关闭的情况");    
71.                 this.bluetoothService.openBluetooth(activity);    
72.             } else {    
73.                 // 蓝牙打开的情况    
74.                 System.out.println("蓝牙打开的情况");    
75.                 this.bluetoothService.closeBluetooth();    
76.     
77.             }    
78.     
79.         }    
80.     }    
81.     
82. }</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 plaincopy

 

1. public class BluetoothService {    
2.     private Context context = null;    
3.     private BluetoothAdapter bluetoothAdapter = BluetoothAdapter    
4.             .getDefaultAdapter();    
5.     private ArrayList<BluetoothDevice> unbondDevices = null; // 用于存放未配对蓝牙设备    
6.     private ArrayList<BluetoothDevice> bondDevices = null;// 用于存放已配对蓝牙设备    
7.     private Button switchBT = null;    
8.     private Button searchDevices = null;    
9.     private ListView unbondDevicesListView = null;    
10.     private ListView bondDevicesListView = null;    
11.     
12.     /**  
13.      * 添加已绑定蓝牙设备到ListView  
14.      */    
15.     private void addBondDevicesToListView() {    
16.         ArrayList<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();    
17.         int count = this.bondDevices.size();    
18.         System.out.println("已绑定设备数量：" + count);    
19.         for (int i = 0; i < count; i++) {    
20.             HashMap<String, Object> map = new HashMap<String, Object>();    
21.             map.put("deviceName", this.bondDevices.get(i).getName());    
22.             data.add(map);// 把item项的数据加到data中    
23.         }    
24.         String[] from = { "deviceName" };    
25.         int[] to = { R.id.device_name };    
26.         SimpleAdapter simpleAdapter = new SimpleAdapter(this.context, data,    
27.                 R.layout.bonddevice_item, from, to);    
28.         // 把适配器装载到listView中    
29.         this.bondDevicesListView.setAdapter(simpleAdapter);    
30.     
31.         this.bondDevicesListView    
32.                 .setOnItemClickListener(new OnItemClickListener() {    
33.     
34.                     @Override    
35.                     public void onItemClick(AdapterView<?> arg0, View arg1,    
36.                             int arg2, long arg3) {    
37.                         BluetoothDevice device = bondDevices.get(arg2);    
38.                         Intent intent = new Intent();    
39.                         intent.setClassName(context,    
40.                                 "com.lifeng.jdxt.view.PrintDataActivity");    
41.                         intent.putExtra("deviceAddress", device.getAddress());    
42.                         context.startActivity(intent);    
43.                     }    
44.                 });    
45.     
46.     }    
47.     
48.     /**  
49.      * 添加未绑定蓝牙设备到ListView  
50.      */    
51.     private void addUnbondDevicesToListView() {    
52.         ArrayList<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();    
53.         int count = this.unbondDevices.size();    
54.         System.out.println("未绑定设备数量：" + count);    
55.         for (int i = 0; i < count; i++) {    
56.             HashMap<String, Object> map = new HashMap<String, Object>();    
57.             map.put("deviceName", this.unbondDevices.get(i).getName());    
58.             data.add(map);// 把item项的数据加到data中    
59.         }    
60.         String[] from = { "deviceName" };    
61.         int[] to = { R.id.device_name };    
62.         SimpleAdapter simpleAdapter = new SimpleAdapter(this.context, data,    
63.                 R.layout.unbonddevice_item, from, to);    
64.     
65.         // 把适配器装载到listView中    
66.         this.unbondDevicesListView.setAdapter(simpleAdapter);    
67.     
68.         // 为每个item绑定监听，用于设备间的配对    
69.         this.unbondDevicesListView    
70.                 .setOnItemClickListener(new OnItemClickListener() {    
71.     
72.                     @Override    
73.                     public void onItemClick(AdapterView<?> arg0, View arg1,    
74.                             int arg2, long arg3) {    
75.                         try {    
76.                             Method createBondMethod = BluetoothDevice.class    
77.                                     .getMethod("createBond");    
78.                             createBondMethod    
79.                                     .invoke(unbondDevices.get(arg2));    
80.                             // 将绑定好的设备添加的已绑定list集合    
81.                             bondDevices.add(unbondDevices.get(arg2));    
82.                             // 将绑定好的设备从未绑定list集合中移除    
83.                             unbondDevices.remove(arg2);    
84.                             addBondDevicesToListView();    
85.                             addUnbondDevicesToListView();    
86.                         } catch (Exception e) {    
87.                             Toast.makeText(context, "配对失败！", Toast.LENGTH_SHORT)    
88.                                     .show();    
89.                         }    
90.     
91.                     }    
92.                 });    
93.     }    
94.     
95.     public BluetoothService(Context context, ListView unbondDevicesListView,    
96.             ListView bondDevicesListView, Button switchBT, Button searchDevices) {    
97.         this.context = context;    
98.         this.unbondDevicesListView = unbondDevicesListView;    
99.         this.bondDevicesListView = bondDevicesListView;    
100.         // this.bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();    
101.         this.unbondDevices = new ArrayList<BluetoothDevice>();    
102.         this.bondDevices = new ArrayList<BluetoothDevice>();    
103.         this.switchBT = switchBT;    
104.         this.searchDevices = searchDevices;    
105.         this.initIntentFilter();    
106.     
107.     }    
108.     
109.     private void initIntentFilter() {    
110.         // 设置广播信息过滤    
111.         IntentFilter intentFilter = new IntentFilter();    
112.         intentFilter.addAction(BluetoothDevice.ACTION_FOUND);    
113.         intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);    
114.         intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);    
115.         intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);    
116.         // 注册广播接收器，接收并处理搜索结果    
117.         context.registerReceiver(receiver, intentFilter);    
118.     
119.     }    
120.     
121.     /**  
122.      * 打开蓝牙  
123.      */    
124.     public void openBluetooth(Activity activity) {    
125.         Intent enableBtIntent = new Intent(    
126.                 BluetoothAdapter.ACTION_REQUEST_ENABLE);    
127.         activity.startActivityForResult(enableBtIntent, 1);    
128.     
129.     }    
130.     
131.     /**  
132.      * 关闭蓝牙  
133.      */    
134.     public void closeBluetooth() {    
135.         this.bluetoothAdapter.disable();    
136.     }    
137.     
138.     /**  
139.      * 判断蓝牙是否打开  
140.      *   
141.      * @return boolean  
142.      */    
143.     public boolean isOpen() {    
144.         return this.bluetoothAdapter.isEnabled();    
145.     
146.     }    
147.     
148.     /**  
149.      * 搜索蓝牙设备  
150.      */    
151.     public void searchDevices() {    
152.         this.bondDevices.clear();    
153.         this.unbondDevices.clear();    
154.     
155.         // 寻找蓝牙设备，android会将查找到的设备以广播形式发出去    
156.         this.bluetoothAdapter.startDiscovery();    
157.     }    
158.     
159.     /**  
160.      * 添加未绑定蓝牙设备到list集合  
161.      *   
162.      * @param device  
163.      */    
164.     public void addUnbondDevices(BluetoothDevice device) {    
165.         System.out.println("未绑定设备名称：" + device.getName());    
166.         if (!this.unbondDevices.contains(device)) {    
167.             this.unbondDevices.add(device);    
168.         }    
169.     }    
170.     
171.     /**  
172.      * 添加已绑定蓝牙设备到list集合  
173.      *   
174.      * @param device  
175.      */    
176.     public void addBandDevices(BluetoothDevice device) {    
177.         System.out.println("已绑定设备名称：" + device.getName());    
178.         if (!this.bondDevices.contains(device)) {    
179.             this.bondDevices.add(device);    
180.         }    
181.     }    
182.     
183.     /**  
184.      * 蓝牙广播接收器  
185.      */    
186.     private BroadcastReceiver receiver = new BroadcastReceiver() {    
187.     
188.         ProgressDialog progressDialog = null;    
189.     
190.         @Override    
191.         public void onReceive(Context context, Intent intent) {    
192.             String action = intent.getAction();    
193.             if (BluetoothDevice.ACTION_FOUND.equals(action)) {    
194.                 BluetoothDevice device = intent    
195.                         .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);    
196.                 if (device.getBondState() == BluetoothDevice.BOND_BONDED) {    
197.                     addBandDevices(device);    
198.                 } else {    
199.                     addUnbondDevices(device);    
200.                 }    
201.             } else if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {    
202.                 progressDialog = ProgressDialog.show(context, "请稍等...",    
203.                         "搜索蓝牙设备中...", true);    
204.     
205.             } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED    
206.                     .equals(action)) {    
207.                 System.out.println("设备搜索完毕");    
208.                 progressDialog.dismiss();    
209.     
210.                 addUnbondDevicesToListView();    
211.                 addBondDevicesToListView();    
212.                 // bluetoothAdapter.cancelDiscovery();    
213.             }    
214.             if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {    
215.                 if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_ON) {    
216.                     System.out.println("--------打开蓝牙-----------");    
217.                     switchBT.setText("关闭蓝牙");    
218.                     searchDevices.setEnabled(true);    
219.                     bondDevicesListView.setEnabled(true);    
220.                     unbondDevicesListView.setEnabled(true);    
221.                 } else if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_OFF) {    
222.                     System.out.println("--------关闭蓝牙-----------");    
223.                     switchBT.setText("打开蓝牙");    
224.                     searchDevices.setEnabled(false);    
225.                     bondDevicesListView.setEnabled(false);    
226.                     unbondDevicesListView.setEnabled(false);    
227.                 }    
228.             }    
229.     
230.         }    
231.     
232.     };    
233.     
234. }  

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 plaincopy

 

1. public class PrintDataActivity extends Activity {    
2.     private Context context = null;    
3.     
4.     public void onCreate(Bundle savedInstanceState) {    
5.         super.onCreate(savedInstanceState);    
6.         this.setTitle("蓝牙打印");    
7.         this.setContentView(R.layout.printdata_layout);    
8.         this.context = this;    
9.         this.initListener();    
10.     }    
11.     
12.     /**  
13.      * 获得从上一个Activity传来的蓝牙地址  
14.      * @return String  
15.      */    
16.     private String getDeviceAddress() {    
17.         // 直接通过Context类的getIntent()即可获取Intent    
18.         Intent intent = this.getIntent();    
19.         // 判断    
20.         if (intent != null) {    
21.             return intent.getStringExtra("deviceAddress");    
22.         } else {    
23.             return null;    
24.         }    
25.     }    
26.     
27.     private void initListener() {    
28.         TextView deviceName = (TextView) this.findViewById(R.id.device_name);    
29.         TextView connectState = (TextView) this    
30.                 .findViewById(R.id.connect_state);    
31.     
32.         PrintDataAction printDataAction = new PrintDataAction(this.context,    
33.                 this.getDeviceAddress(), deviceName, connectState);    
34.     
35.         EditText printData = (EditText) this.findViewById(R.id.print_data);    
36.         Button send = (Button) this.findViewById(R.id.send);    
37.         Button command = (Button) this.findViewById(R.id.command);    
38.         printDataAction.setPrintData(printData);    
39.     
40.         send.setOnClickListener(printDataAction);    
41.         command.setOnClickListener(printDataAction);    
42.     }    
43.     
44.         
45.     @Override    
46.     protected void onDestroy() {    
47.         PrintDataService.disconnect();    
48.         super.onDestroy();    
49.     }    
50.         
51. }  

 

 

PrintDataAction.java

 

 

[java] view plaincopy

 

1. <span style="font-size:14px">public class PrintDataAction implements OnClickListener {    
2.     private Context context = null;    
3.     private TextView deviceName = null;    
4.     private TextView connectState = null;    
5.     private EditText printData = null;    
6.     private String deviceAddress = null;    
7.     private PrintDataService printDataService = null;    
8.     
9.     public PrintDataAction(Context context, String deviceAddress,    
10.             TextView deviceName, TextView connectState) {    
11.         super();    
12.         this.context = context;    
13.         this.deviceAddress = deviceAddress;    
14.         this.deviceName = deviceName;    
15.         this.connectState = connectState;    
16.         this.printDataService = new PrintDataService(this.context,    
17.                 this.deviceAddress);    
18.         this.initView();    
19.     
20.     }    
21.     
22.     private void initView() {    
23.         // 设置当前设备名称    
24.         this.deviceName.setText(this.printDataService.getDeviceName());    
25.         // 一上来就先连接蓝牙设备    
26.         boolean flag = this.printDataService.connect();    
27.         if (flag == false) {    
28.             // 连接失败    
29.             this.connectState.setText("连接失败！");    
30.         } else {    
31.             // 连接成功    
32.             this.connectState.setText("连接成功！");    
33.     
34.         }    
35.     }    
36.     
37.     public void setPrintData(EditText printData) {    
38.         this.printData = printData;    
39.     }    
40.     
41.     @Override    
42.     public void onClick(View v) {    
43.         if (v.getId() == R.id.send) {    
44.             String sendData = this.printData.getText().toString();    
45.             this.printDataService.send(sendData + "\n");    
46.         } else if (v.getId() == R.id.command) {    
47.             this.printDataService.selectCommand();    
48.     
49.         }    
50.     }    
51. }</span>  

PrintDataService.java

 

 

 

[java] view plaincopy

 

1. <span style="font-size:14px">public class PrintDataService {    
2.     private Context context = null;    
3.     private String deviceAddress = null;    
4.     private BluetoothAdapter bluetoothAdapter = BluetoothAdapter    
5.             .getDefaultAdapter();    
6.     private BluetoothDevice device = null;    
7.     private static BluetoothSocket bluetoothSocket = null;    
8.     private static OutputStream outputStream = null;    
9.     private static final UUID uuid = UUID    
10.             .fromString("00001101-0000-1000-8000-00805F9B34FB");    
11.     private boolean isConnection = false;    
12.     final String[] items = { "复位打印机", "标准ASCII字体", "压缩ASCII字体", "字体不放大",    
13.             "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",    
14.             "取消顺时针旋转90°", "选择顺时针旋转90°" };    
15.     final byte[][] byteCommands = { { 0x1b, 0x40 },// 复位打印机    
16.             { 0x1b, 0x4d, 0x00 },// 标准ASCII字体    
17.             { 0x1b, 0x4d, 0x01 },// 压缩ASCII字体    
18.             { 0x1d, 0x21, 0x00 },// 字体不放大    
19.             { 0x1d, 0x21, 0x11 },// 宽高加倍    
20.             { 0x1b, 0x45, 0x00 },// 取消加粗模式    
21.             { 0x1b, 0x45, 0x01 },// 选择加粗模式    
22.             { 0x1b, 0x7b, 0x00 },// 取消倒置打印    
23.             { 0x1b, 0x7b, 0x01 },// 选择倒置打印    
24.             { 0x1d, 0x42, 0x00 },// 取消黑白反显    
25.             { 0x1d, 0x42, 0x01 },// 选择黑白反显    
26.             { 0x1b, 0x56, 0x00 },// 取消顺时针旋转90°    
27.             { 0x1b, 0x56, 0x01 },// 选择顺时针旋转90°    
28.     };    
29.     
30.     public PrintDataService(Context context, String deviceAddress) {    
31.         super();    
32.         this.context = context;    
33.         this.deviceAddress = deviceAddress;    
34.         this.device = this.bluetoothAdapter.getRemoteDevice(this.deviceAddress);    
35.     }    
36.     
37.     /**  
38.      * 获取设备名称  
39.      *   
40.      * @return String  
41.      */    
42.     public String getDeviceName() {    
43.         return this.device.getName();    
44.     }    
45.     
46.     /**  
47.      * 连接蓝牙设备  
48.      */    
49.     public boolean connect() {    
50.         if (!this.isConnection) {    
51.             try {    
52.                 bluetoothSocket = this.device    
53.                         .createRfcommSocketToServiceRecord(uuid);    
54.                 bluetoothSocket.connect();    
55.                 outputStream = bluetoothSocket.getOutputStream();    
56.                 this.isConnection = true;    
57.                 if (this.bluetoothAdapter.isDiscovering()) {    
58.                     System.out.println("关闭适配器！");    
59.                     this.bluetoothAdapter.isDiscovering();    
60.                 }    
61.             } catch (Exception e) {    
62.                 Toast.makeText(this.context, "连接失败！", 1).show();    
63.                 return false;    
64.             }    
65.             Toast.makeText(this.context, this.device.getName() + "连接成功！",    
66.                     Toast.LENGTH_SHORT).show();    
67.             return true;    
68.         } else {    
69.             return true;    
70.         }    
71.     }    
72.     
73.     /**  
74.      * 断开蓝牙设备连接  
75.      */    
76.     public static void disconnect() {    
77.         System.out.println("断开蓝牙设备连接");    
78.         try {    
79.             bluetoothSocket.close();    
80.             outputStream.close();    
81.         } catch (IOException e) {    
82.             // TODO Auto-generated catch block    
83.             e.printStackTrace();    
84.         }    
85.     
86.     }    
87.     
88.     /**  
89.      * 选择指令  
90.      */    
91.     public void selectCommand() {    
92.         new AlertDialog.Builder(context).setTitle("请选择指令")    
93.                 .setItems(items, new DialogInterface.OnClickListener() {    
94.                     @Override    
95.                     public void onClick(DialogInterface dialog, int which) {    
96.                         try {    
97.                             outputStream.write(byteCommands[which]);    
98.                         } catch (IOException e) {    
99.                             Toast.makeText(context, "设置指令失败！",    
100.                                     Toast.LENGTH_SHORT).show();    
101.                         }    
102.                     }    
103.                 }).create().show();    
104.     }    
105.     
106.     /**  
107.      * 发送数据  
108.      */    
109.     public void send(String sendData) {    
110.         if (this.isConnection) {    
111.             System.out.println("开始打印！！");    
112.             try {    
113.                 byte[] data = sendData.getBytes("gbk");    
114.                 outputStream.write(data, 0, data.length);    
115.                 outputStream.flush();    
116.             } catch (IOException e) {    
117.                 Toast.makeText(this.context, "发送失败！", Toast.LENGTH_SHORT)    
118.                         .show();    
119.             }    
120.         } else {    
121.             Toast.makeText(this.context, "设备未连接，请重新连接！", Toast.LENGTH_SHORT)    
122.                     .show();    
123.     
124.         }    
125.     }    
126.     
127. }</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 plaincopy

 

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

注册Activity

 

[html] view plaincopy

 

1. <span style="font-size:14px"><activity android:name=".BluetoothActivity" />    
2. <activity android:name=".PrintDataActivity" /> </span><span style="font-size:14px">   
3.   
4. </span>  

这下子就真的搞定了！