<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical" android:layout_width="match_parent"

    android:layout_height="match_parent">

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:textStyle="bold"

        android:textSize="25sp"

        android:text="需要拦截的号码"/>

    <EditText

        android:id="@+id/phoneNum"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" />

    <Button

        android:id="@+id/sure"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:textSize="18sp"

        android:text="确认"/>

</LinearLayout>

package xidian.dy.com.chujia;

import android.content.Context;

import android.content.SharedPreferences;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    SharedPreferences sp;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        sp = getSharedPreferences("hate", Context.MODE_PRIVATE);

        Button button = (Button) findViewById(R.id.sure);

        if(button != null)

            button.setOnClickListener(new View.OnClickListener() {

                @Override

                public void onClick(View v) {

                    EditText et = (EditText) findViewById(R.id.phoneNum);

                    if(et != null){

                        sp.getString("num", et.getText().toString());

                        Toast.makeText(MainActivity.this, "保存成功", Toast.LENGTH_SHORT).show();

                    }

                }

            });

    }

}

package xidian.dy.com.chujia;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.os.Build;

import android.os.Bundle;

import android.provider.Telephony;

import android.telephony.SmsMessage;

import android.util.Log;

/**

 * Created by dy on 2016/7/11.

 */

public class SmsReciever extends BroadcastReceiver {

    @Override

    public void onReceive(Context context, Intent intent) {

    //短信的信息封装在Intent中

        Bundle bundle = intent.getExtras();

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

        SmsMessage sms;

        int currentApiVversion = Build.VERSION.SDK_INT;

        //拿到广播中的所有短信(有可能短信太长在发送时被拆分成多条进行发送)

        for (Object obj : objects) {

            if(currentApiVversion >= Build.VERSION_CODES.LOLLIPOP)

                sms =  SmsMessage.createFromPdu((byte[])obj, Telephony.Sms.Intents.SMS_RECEIVED_ACTION);

            else

                sms = SmsMessage.createFromPdu((byte[])obj);

            Log.i(this.getClass().getName(), sms.getOriginatingAddress());

            Log.i(this.getClass().getName(), sms.getMessageBody());

            //广播拦截

            //来自1243的短信将会被拦截掉

            if(sms.getOriginatingAddress().equals("1243")){

                abortBroadcast();

            }

        }

    }

}

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="xidian.dy.com.chujia">

    <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"

            android:label="主界面">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <receiver android:name=".SmsReciever">

            <intent-filter android:priority="1000">

                <action android:name="android.provider.Telephony_SMS_RECIEVED"/>

            </intent-filter>

        </receiver>

    </application>

</manifest>