Hello, guys. I am new to android and i am using android 2.2 for some sms_receive thing: when an sms received, just a notification. but it won't work... Nothing happens when sms received, seems like the receiver has not been registered. help! Here is part of the code and xml.
androidmanifest.xml
 <uses-permission android:name="android.permission.RECEIVE_SMS"/>
<application android:icon="@drawable/icon" android:label="@string/app_name">
    <activity android:label="@string/app_name" android:name=".Track">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <receiver android:name=".SMSReceiver" android:enabled="true">
        <intent_filter>
            <action android:name="android.provider.Telephony.SMS_RECEIVED"/>
        </intent_filter>
    </receiver>
</application>
<uses-sdk android:minSdkVersion="8" />
my receiver class :SMSReceiver.java:
package com.happyto.tracker;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.widget.Toast; import android.util.Log;
public class SMSReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
    String smsReceived = "android.provider.Telephony.SMS_RECEIVED";
    Log.e("tracker", intent.getAction());
    if (intent.getAction().equals(smsReceived)) {
        // ---get the SMS message passed in---
        Bundle bundle = intent.getExtras();
        SmsMessage[] msgs = null;
        String str = "";
        if (bundle != null) {
            // ---retrieve the SMS message received---
            Object[] pdus = (Object[]) bundle.get("pdus");
            msgs = new SmsMessage[pdus.length];
            for (int i = 0; i < msgs.length; i++) {
                msgs[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);
                str += "SMS from " + msgs[i].getOriginatingAddress();
                str += " :";
                str += msgs[i].getMessageBody().toString();
                str += "\n";
            }
            // ---display the new SMS message---
            Toast.makeText(context, str, Toast.LENGTH_SHORT).show();
        }
    }
}
}