注册BroadcastReceiver的方法有两种:
1、在应用程序的代码中进行注册
如果一个BroadcastReceiver用于更新UI,那么通常会使用这种方法进行注册
在Activity启动的时候注册BroadcastReceiver,在Activity不可见以后取消注册
注册BroadcastReceiver: registerReceiver(receiver,filter);
取消注册BroadcastReceiver: unregisterReceiver(receiver);
2、在AndroidManifest.xml当中进行注册
使用这样的方式注册BroadcastReceiver,即使应用程序没有启动,或者被kill掉后,也始终会处于活动状态, BroadcastReceiver还可以接收广播消息
- <receiver android:name=".TestReceiver">
- <intent-filter>
- <action android:name="android.intent.action.PICK" />
- </intent-filter>
- </receiver>
TestBC2Activity.Java
- public class TestBC2Activity extends Activity {
- private Button registerButton = null;
- private Button unregisterButton = null;
- private SMSReceiver smsReceiver = null;
- private static final String SMS_ACTION = "android.provider.Telephony.SMS_RECEIVED";
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- registerButton = (Button)findViewById(R.id.register);
- unregisterButton = (Button)findViewById(R.id.unregister);
- registerButton.setOnClickListener(new OnClickListener() {
- @Override
- public void onClick(View v) {
- //生成一个BroiadcastReceiver对象
- smsReceiver = new SMSReceiver();
- //生成一个IntentFilter对象
- IntentFilter filter = new IntentFilter();
- //为IntentFilter添加一个Action
- filter.addAction(SMS_ACTION);
- //将BroadcastReceiver对象注册到系统当中
- TestBC2Activity.this.registerReceiver(smsReceiver,filter);
- }
- });
- unregisterButton.setOnClickListener(new OnClickListener() {
- @Override
- public void onClick(View v) {
- //解除BroadcastReceiver对象的注册
- TestBC2Activity.this.unregisterReceiver(smsReceiver);
- }
- });
- }
- }
SMSReceiver.java
- public class SMSReceiver extends BroadcastReceiver {
- @Override
- public void onReceive(Context context, Intent intent) {
- System.out.println("receive message");
- //接受Intent对象当中的数据
- Bundle bundle = intent.getExtras();
- //在Bundle对象当中有一个属性名为pdus,这个属性的值是一个Object数组
- Object[] myOBJpdus = (Object[]) bundle.get("pdus");
- //创建一个SmsMessage类型的数组
- SmsMessage[] message = new SmsMessage[myOBJpdus.length];
- System.out.println(message.length);
- for(int i = 0 ; i < myOBJpdus.length; i++){
- //使用Object数组当中的对象创建SmsMessage对象
- message[i] = SmsMessage.createFromPdu((byte[]) myOBJpdus[i]);
- //调用SmsMessage对象的getDisppalyMessageBody()方法,就可以得到消息的内容
- System.out.println(message[i].getDisplayMessageBody());
- }
- }
- }
这个广播接收是测试接收短信,所以需要mainfest文件允许
- <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission>
结果:
备注:
给模拟器发短信是使用Emulator Control