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;  
2.   
3. import java.util.Set;  
4.   
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;  
19.   
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;  
34.       
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);  
41.           
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);    
47.           
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.         }  
58.           
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);    
68.           
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.         }  
77.   
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.     }  
118.       
119.     @Override    
120.     protected void onDestroy() {    
121.         super.onDestroy();    
122.         android.os.Process.killProcess(android.os.Process.myPid());    
123.     }    
124.       
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.                 }  
157.                   
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();  
168.               
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");  
183.                       
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   
207.                       
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.             }  
219.               
220.             break;  
221.         }  
222.         default:  
223.             break;  
224.         }  
225.     }  
226.       
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");  
238.                   
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");   
246.                       
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: