如何在Android中自动读取短信？

<uses-permission android:name="android.permission.RECEIVE_SMS" />
<application>
    ...
    <receiver android:name=".SmsReceiver">
        <intent-filter>
            <action android:name="android.provider.Telephony.SMS_RECEIVED" />
        </intent-filter>
    </receiver>
    ...
</application>

public class SmsReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Telephony.Sms.Intents.SMS_RECEIVED_ACTION)) {
            Bundle bundle = intent.getExtras();
            if (bundle != null) {
                Object[] pdus = (Object[]) bundle.get("pdus");
                if (pdus != null) {
                    for (Object pdu : pdus) {
                        SmsMessage smsMessage = SmsMessage.createFromPdu((byte[]) pdu);
                        String messageBody = smsMessage.getMessageBody();
                        String sender = smsMessage.getDisplayOriginatingAddress();
                        // 在这里处理收到的短信内容
                    }
                }
            }
        }
    }
}