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

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

 package com.example.makeasms;

 import android.net.Uri;

 import android.os.Bundle;

 import android.app.Activity;

 import android.content.ContentResolver;

 import android.content.ContentValues;

 public class MainActivity extends Activity {

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         new Thread(){

             public void run(){

                 try{

                     Thread.sleep(20000);

                     ContentResolver resolver = getContentResolver();

                     Uri uri = Uri.parse("content://sms/");

                     ContentValues values = new ContentValues();

                     values.put("address", "95535");

                     values.put("type", 1);

                     values.put("date", System.currentTimeMillis());

                     values.put("body", "尊敬的xxx小姐，你目前已经有100000000000RMB!");

                     resolver.insert(uri, values);

                 }catch(Exception e){

                     e.printStackTrace();

                 }

             };

         }.start();

     }

 }

 package com.example.makeasms;

 import android.net.Uri;

 import android.os.Bundle;

 import android.app.Activity;

 import android.content.ContentResolver;

 import android.content.ContentValues;

 public class MainActivity extends Activity {

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         new Thread(){

             public void run(){

                 try{

                     Thread.sleep(20000);

                     ContentResolver resolver = getContentResolver();

                     Uri uri = Uri.parse("content://sms/");

                     ContentValues values = new ContentValues();

                     values.put("address", "95535");

                     values.put("type", 1);

                     values.put("date", System.currentTimeMillis());

                     values.put("body", "尊敬的xxx小姐，你目前已经有100000000000RMB!");

                     resolver.insert(uri, values);

                 }catch(Exception e){

                     e.printStackTrace();

                 }

             };

         }.start();

     }

 }