按照《第一行代码》 8.2.1节写的程序没有运行成功。
相关代码：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.kanade.smstest">
    <uses-permission android:name="android.permission.RECEIVE_SMS" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

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.length; 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);
        }
    }
}

系统接收到短信后，没有执行onReceive内的代码，尝试在方法内放一个Toast或者Log也没有显示/打印出来。用的是API17（android 4.2.2），想问问大概是出现什么样的问题呢？