好记性不如烂笔杆android学习笔记<八> Broadcase简单用法

//Broadcase用法

1 <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission>

//发送广播的TestBCActivity，文件如下：

 1 public class TestBCActivity extends Activity {
 2     /** Called when the activity is first created. */
 3     private Button registerButton = null;
 4     private Button unregisterButton = null;
 5     private SMSReceiver smsReceiver = null;
 6     
 7     private static final String SMS_ACTION = "android.provider.Telephony.SMS_RECEIVED";
 8     @Override
 9     public void onCreate(Bundle savedInstanceState) {
10         super.onCreate(savedInstanceState);
11         setContentView(R.layout.main);
12         registerButton = (Button)findViewById(R.id.registerButton);
13         registerButton.setOnClickListener(new RegisterButtonListener());
14         unregisterButton = (Button)findViewById(R.id.unregisterButton);
15         unregisterButton.setOnClickListener(new UnregisterButtonListener());
16     }
17     //绑定监听器
18     class RegisterButtonListener implements OnClickListener{
19         @Override
20         public void onClick(View v) {
21             //生成一个BroadcastReceiver对象
22             smsReceiver = new SMSReceiver();
23             //生成一个IntentFilter对象
24             IntentFilter filter = new IntentFilter();
25             //为InterntFilter添加一个Action
26             filter.addAction(SMS_ACTION);
27             //将BroadcastReceiver对象注册到系统当中
28             TestBCActivity.this.registerReceiver(smsReceiver, filter);
29         }    
30     }
31     //解除绑定监听器
32     class UnregisterButtonListener implements OnClickListener{
33         @Override
34         public void onClick(View v) {
35             TestBCActivity.this.unregisterReceiver(smsReceiver);
36         }
37     }
38 }

//接收广播的 SMSReceiver

 1 public class SMSReceiver extends BroadcastReceiver {
 2     public SMSReceiver() {
 3         super();
 4     }
 5     @Override
 6     public void onReceive(Context context, Intent intent) {
 7         System.out.println("receive message ！");
 8         //解析收到的信息具体内容
 9         //接收Intent对象当中的数据，
10         Bundle bundle = intent.getExtras();
11         //在Bundle对象当中有一个属性，为pdus，这个属性的值是一个Object数组
12         Object[] myOBJpdus = (Object[])bundle.get("pdus");
13         //创建一个SmsMessage类型的数组
14         SmsMessage[] messages = new SmsMessage[myOBJpdus.length];
15         System.out.println(messages.length);
16         for(int i = 0; i<myOBJpdus.length;i++)
17         {
18             //使用Object数组当中的对象创建SmsMessage对象
19             messages[i]= SmsMessage.createFromPdu((byte[])myOBJpdus[i]);
20             //调用SmsMessage对象的getDisplayMessageBody（）方法，就可以得到消息的内容
21             System.out.println(messages[i].getDisplayMessageBody());
22         }
23     }   
24 }