Android開發教程：藍牙測試

軟件平台:Windows 7 + Eclipse + SDK

設計思路:

配合倒計時定時器實現藍牙打開,可見,掃描三個功能

源代碼:

main.xml:

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android"
3. android:layout_width="fill_parent"
4. android:layout_height="fill_parent" android:orientation="vertical">
5. <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:text="TextView" android:layout_height="wrap_content"></TextView>
6. <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/linearLayout1">
7. <Button android:id="@+id/button1" android:text="OFF" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
8. </LinearLayout>
9. <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/linearLayout2">
10. <Button android:id="@+id/button2" android:text="開啟可見 " android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
11. <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="設備不可見 "></TextView>
12. </LinearLayout>
13. <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/linearLayout3">
14. <Button android:id="@+id/button3" android:text="掃描:OFF" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
15. <TextView android:id="@+id/textView3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="停止掃描 "></TextView>
16. </LinearLayout>
17. <ListView android:id="@+id/listView1" android:layout_height="wrap_content" android:layout_width="match_parent"></ListView>
18. </LinearLayout>

test_bluetooth.java:

1. package com.test_bluetooth;
3. import java.util.Set;
5. import android.app.Activity;
6. import android.bluetooth.BluetoothAdapter;
7. import android.bluetooth.BluetoothDevice;
8. import android.content.BroadcastReceiver;
9. import android.content.Context;
10. import android.content.Intent;
11. import android.content.IntentFilter;
12. import android.os.Bundle;
13. import android.os.CountDownTimer;
14. import android.view.View;
15. import android.widget.ArrayAdapter;
16. import android.widget.Button;
17. import android.widget.ListView;
18. import android.widget.TextView;
20. public class test_bluetooth extends Activity implements View.OnClickListener
21. {
22. private static final int REQUEST_ENABLE_BT = 2;
23. TextView txt;
24. TextView txt_see;
25. TextView txt_scan;
26. BluetoothAdapter mBluetoothAdapter;
27. ArrayAdapter<String> mArrayAdapter;
28. Button btn_switch;
29. Button btn_see;
30. Button btn_scan;
31. ListView list;
32. CountDownTimer see_timer;
33. CountDownTimer scan_timer;
35. /** Called when the activity is first created. */
36. @Override
37. public void onCreate(Bundle savedInstanceState)
38. {
39. super.onCreate(savedInstanceState);
40. setContentView(R.layout.main);
42. txt = (TextView)findViewById(R.id.textView1);
43. txt_see = (TextView)findViewById(R.id.textView2);
44. txt_scan = (TextView)findViewById(R.id.textView3);
45. //綁定XML中的ListView，作為Item的容器
46. list = (ListView) findViewById(R.id.listView1);
48. //獲取藍牙適配器
49. mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
50. mArrayAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1);
51. if (mBluetoothAdapter == null)
52. {
53. // Device does not support Bluetooth
54. txt.setText("fail");
55. //退出程序
56. test_bluetooth.this.finish();
57. }
59. btn_switch = (Button)findViewById(R.id.button1);
60. btn_switch.setOnClickListener(this);
61. btn_see = (Button)findViewById(R.id.button2);
62. btn_see.setOnClickListener(this);
63. btn_see.setEnabled(false);
64. btn_scan = (Button)findViewById(R.id.button3);
65. btn_scan.setOnClickListener(this);
66. btn_scan.setText("掃描:OFF");
67. btn_scan.setEnabled(false);
69. //判斷藍牙是否已經被打開
70. if (mBluetoothAdapter.isEnabled())
71. {
72. //打開
73. btn_switch.setText("ON");
74. btn_see.setEnabled(true);
75. btn_scan.setEnabled(true);
76. }
78. see_timer = new CountDownTimer(120000,1000)
79. {
80. @Override
81. public void onTick( long millisUntilFinished)
82. {
83. txt_see.setText( "剩余可見時間" + millisUntilFinished / 1000 + "秒");
84. }
85. @Override
86. public void onFinish()
87. {
88. //判斷藍牙是否已經被打開
89. if (mBluetoothAdapter.isEnabled())
90. {
91. btn_see.setEnabled(true);
92. txt_see.setText( "設備不可見");
93. }
94. }
95. };
96. scan_timer = new CountDownTimer(12000,1000)
97. {
98. @Override
99. public void onTick( long millisUntilFinished)
100. {
101. txt_scan.setText( "剩余掃描時間" + millisUntilFinished / 1000 + "秒");
102. }
103. @Override
104. public void onFinish()
105. {
106. //判斷藍牙是否已經被打開
107. if (mBluetoothAdapter.isEnabled())
108. {
109. btn_scan.setEnabled(true);
110. //關閉掃描
111. mBluetoothAdapter.cancelDiscovery();
112. btn_scan.setText("掃描:OFF");
113. txt_scan.setText( "停止掃描");
114. }
115. }
116. };
117. }
119. @Override
120. protected void onDestroy() {
121. super.onDestroy();
122. android.os.Process.killProcess(android.os.Process.myPid());
123. }
125. @Override
126. public void onClick(View v)
127. {
128. // TODO Auto-generated method stub
129. switch (v.getId())
130. {
131. case R.id.button1:
132. {
133. String str = btn_switch.getText().toString();
134. if (str == "OFF")
135. {
136. if (!mBluetoothAdapter.isEnabled())
137. {
138. //打開藍牙
139. Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
140. startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
141. txt.setText("s1");
142. btn_see.setEnabled(true);
143. btn_scan.setText("掃描:OFF");
144. btn_scan.setEnabled(true);
145. }
146. }
147. else
148. {
149. //關閉藍牙
150. mBluetoothAdapter.disable();
151. btn_switch.setText("OFF");
152. mArrayAdapter.clear();
153. list.setAdapter(mArrayAdapter);
154. btn_see.setEnabled(false);
155. btn_scan.setEnabled(false);
156. }
158. break;
159. }
160. case R.id.button2:
161. {
162. //開啟可見
163. Intent enableBtIntent_See = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
164. startActivityForResult(enableBtIntent_See, 3);
165. txt.setText("s1");
166. btn_see.setEnabled(false);
167. see_timer.start();
169. break;
170. }
171. case R.id.button3:
172. {
173. String str = btn_scan.getText().toString();
174. if (str == "掃描:OFF")
175. {
176. txt.setText("s5");
177. if (mBluetoothAdapter.isEnabled())
178. {
179. //開始掃描
180. mBluetoothAdapter.startDiscovery();
181. txt.setText("s6");
182. btn_scan.setText("掃描:ON");
184. // Create a BroadcastReceiver for ACTION_FOUND
185. final BroadcastReceiver mReceiver = new BroadcastReceiver()
186. {
187. @Override
188. public void onReceive(Context context, Intent intent)
189. {
190. // TODO Auto-generated method stub
191. String action = intent.getAction();
192. // When discovery finds a device
193. mArrayAdapter.clear();
194. if (BluetoothDevice.ACTION_FOUND.equals(action))
195. {
196. // Get the BluetoothDevice object from the Intent
197. BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
198. // Add the name and address to an array adapter to show in a ListView
199. mArrayAdapter.add(device.getName() + ":" + device.getAddress());
200. }
201. list.setAdapter(mArrayAdapter);
202. }
203. };
204. // Register the BroadcastReceiver
205. IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
206. registerReceiver(mReceiver, filter); // Don't forget to unregister during onDestroy
208. scan_timer.start();
209. }
210. }
211. else
212. {
213. //關閉掃描
214. mBluetoothAdapter.cancelDiscovery();
215. btn_scan.setText("掃描:OFF");
216. scan_timer.cancel();
217. txt_scan.setText( "停止掃描");
218. }
220. break;
221. }
222. default:
223. break;
224. }
225. }
227. public void onActivityResult(int requestCode, int resultCode, Intent data)
228. {
229. switch (requestCode)
230. {
231. case REQUEST_ENABLE_BT:
232. // When the request to enable Bluetooth returns
233. if (resultCode == Activity.RESULT_OK)
234. {
235. // Bluetooth is now enabled, so set up a chat session
236. btn_switch.setText("ON");
237. txt.setText("s4");
239. //獲取藍牙列表
240. Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
241. mArrayAdapter.clear();
242. // If there are paired devices
243. if (pairedDevices.size() > 0)
244. {
245. //txt.setText("s3");
247. // Loop through paired devices
248. for (BluetoothDevice device : pairedDevices)
249. {
250. // Add the name and address to an array adapter to show in a ListView
251. mArrayAdapter.add(device.getName() + ":" + device.getAddress());
252. }
253. list.setAdapter(mArrayAdapter);
254. }
255. } else
256. {
257. finish();
258. }
259. }
260. }
261. }

效果圖: