拦截短信有几个关键点：

1.android接收短信时是以广播的方式

2.程序只要在自己的Manifest.xml里加有"接收"SMS的权限

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< uses-permission android:name="android.permission.RECEIVE_SMS">< /uses-permission> 

3.要写个广播接收类
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public
class smsreceiveandmask extends BroadcastReceiver { 
    private String TAG = "smsreceiveandmask"; 
    @Override

    public
void onReceive(Context context, Intent intent) { 

    } 
4.Manifest.xml的receiver标签里要加入intent-filter ,action为

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< action android:name="android.provider.Telephony.SMS_RECEIVED" /> 

5.重要的是要在这个intent-filter上加上priority优先级，以使自己接收到SMS优先于系统或其它软件

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< receiver android:name=".smsreceiveandmask" > 
            < intent-filter android:priority="1000">  
                < action android:name="android.provider.Telephony.SMS_RECEIVED" /> 
            < /intent-filter> 
        < /receiver> 

6.当自己的程序接收到要屏蔽的SMS后，用
this.abortBroadcast();来结束广播的继续发给别的程序，这样系统就不会收到短信广播了，Notification也不会有提示了
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// 第三步:取消

        if (flags_filter) { 
            this.abortBroadcast(); 
        } 
源码如下：

Manifest.xml
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< ?xml version="1.0" encoding="utf-8"?> 
< manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.hwttnet.test.smsreceiveandmask" android:versionCode="1"

    android:versionName="1.0"> 
    < uses-sdk android:minSdkVersion="3" /> 
    < uses-permission android:name="android.permission.RECEIVE_SMS">< /uses-permission> 
    < application android:icon="@drawable/icon" android:label="@string/app_name"> 
        < receiver android:name=".smsreceiveandmask" > 
            < intent-filter android:priority="1000">  
                < action android:name="android.provider.Telephony.SMS_RECEIVED" /> 
            < /intent-filter> 
        < /receiver> 
    < /application> 
< /manifest> 
BroadcastReceiver类：
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package com.hwttnet.test.smsreceiveandmask; 
import android.app.Activity; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.os.Bundle; 
import android.telephony.SmsMessage; 
import android.util.Log; 
public
class smsreceiveandmask extends BroadcastReceiver { 
    private String TAG = "smsreceiveandmask"; 
    @Override

    public
void onReceive(Context context, Intent intent) { 
        Log.v(TAG, ">>>>>>>onReceive start"); 
        // 第一步、获取短信的内容和发件人

        StringBuilder body = new StringBuilder();// 短信内容

        StringBuilder number = new StringBuilder();// 短信发件人

        Bundle bundle = intent.getExtras(); 
        if (bundle != null) { 
            Object[] _pdus = (Object[]) bundle.get("pdus"); 
            SmsMessage[] message = new SmsMessage[_pdus.length]; 
            for (int i = 0; i < _pdus.length; i++) { 
                message = SmsMessage.createFromPdu((byte[]) _pdus); 
            } 
            for (SmsMessage currentMessage : message) { 
                body.append(currentMessage.getDisplayMessageBody()); 
                number.append(currentMessage.getDisplayOriginatingAddress()); 
            } 
            String smsBody = body.toString(); 
            String smsNumber = number.toString(); 
            if (smsNumber.contains("+86")) { 
                smsNumber = smsNumber.substring(3); 
            } 
            // 第二步:确认该短信内容是否满足过滤条件

            boolean flags_filter = false; 
            if (smsNumber.equals("10086")) {// 屏蔽10086发来的短信

                flags_filter = true; 
                Log.v(TAG, "sms_number.equals(10086)"); 
            } 
            // 第三步:取消

            if (flags_filter) { 
                this.abortBroadcast(); 
            } 
        } 
        Log.v(TAG, ">>>>>>>onReceive end"); 
    } 
}