《第一行代码》第八章短信接收Demo达不到预期效果

public class MainActivity extends Activity {



    private TextView sender;

    private TextView content;



    private IntentFilter receiveFilter;

    private MessageReceiver messageReceiver;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Toast.makeText(MainActivity.this, "应用启动", Toast.LENGTH_SHORT).show();

        sender = (TextView) findViewById(R.id.sender);

        cOntent= (TextView) findViewById(R.id.content);

        receiveFilter = new IntentFilter();

        receiveFilter.addAction("android.provider.Telephony.SMS_RECEIVED");

        receiveFilter.setPriority(1000);

        messageReceiver = new MessageReceiver();

        registerReceiver(messageReceiver, receiveFilter);

    }



    @Override

    protected void onDestroy() {

        super.onDestroy();

        unregisterReceiver(messageReceiver);

    }



    private class MessageReceiver extends BroadcastReceiver{

        @Override

        public void onReceive(Context context, Intent intent) {

            Toast.makeText(context, "收到短信", Toast.LENGTH_SHORT).show();

            Bundle bundle = intent.getExtras();

            Object[] pdus = (Object[]) bundle.get("pdus");

            SmsMessage[] messages = new SmsMessage[pdus.length];

            for (int i = 0; i
                messages[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);

            }



            String address = messages[0].getOriginatingAddress();

            String fullMessage = "";

            for (SmsMessage message : messages) {

                fullMessage += message.getMessageBody();

            }

            sender.setText(address);

            content.setText(fullMessage);

        }

    }

}