We can send sms in android by means of goal. You have to compose just 4 lines of code the send sms in android.

//Getting intent and PendingIntent instance  
Intent intent=new Intent(getApplicationContext(),MainActivity.class);  
PendingIntent pi=PendingIntent.getActivity(getApplicationContext(), 0, intent,0);  
  
//Get the SmsManager instance and call the sendTextMessage method to send message                 
SmsManager sms=SmsManager.getDefault();  
sms.sendTextMessage("9650322998", null, "hello Mithilesh JavaTportal", pi,null);

Example of sending sms in android

<RelativeLayout xmlns:androclass="http://schemas.android.com/apk/res/android"  
    xmlns:tools="http://schemas.android.com/tools"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent"  
    tools:context=".MainActivity" >  
  
    <EditText  
        android:id="@+id/editText1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignParentRight="true"  
        android:layout_alignParentTop="true"  
        android:layout_marginRight="20dp"  
        android:ems="10" />  
  
    <EditText  
        android:id="@+id/editText2"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/editText1"  
        android:layout_below="@+id/editText1"  
        android:layout_marginTop="26dp"  
        android:ems="10"  
        android:inputType="textMultiLine" />  
  
    <TextView  
        android:id="@+id/textView1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignBaseline="@+id/editText1"  
        android:layout_alignBottom="@+id/editText1"  
        android:layout_toLeftOf="@+id/editText1"  
        android:text="Mobile No:" />  
  
    <TextView  
        android:id="@+id/textView2"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignBaseline="@+id/editText2"  
        android:layout_alignBottom="@+id/editText2"  
        android:layout_alignLeft="@+id/textView1"  
        android:text="Message:" />  
  
    <Button  
        android:id="@+id/button1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/editText2"  
        android:layout_below="@+id/editText2"  
        android:layout_marginLeft="34dp"  
        android:layout_marginTop="48dp"  
        android:text="Send SMS" />  
  
</RelativeLayout>

Write the permission code in Android-Manifest.xml file

<?xml version="1.0" encoding="utf-8"?>  
<manifest   
xmlns:androclass="http://schemas.android.com/apk/res/android"  
    package="com.example.sendsms"  
    android:versionCode="1"  
    android:versionName="1.0" >  
  
    <uses-sdk  
        android:minSdkVersion="8"  
        android:targetSdkVersion="16" />  
  
    <uses-permission android:name="android.permission.SEND_SMS"/>  
    
    <uses-permission android:name="android.permission.RECEIVE_SMS"/>  
  
    <application  
        android:allowBackup="true"  
        android:icon="@drawable/ic_launcher"  
        android:label="@string/app_name"  
        android:theme="@style/AppTheme" >  
        <activity  
            android:name="com.example.sendsms.MainActivity"  
            android:label="@string/app_name" >  
            <intent-filter>  
                <action android:name="android.intent.action.MAIN" />  
  
                <category android:name="android.intent.category.LAUNCHER" />  
            </intent-filter>  
        </activity>  
    </application>  
  
</manifest>

Activity class

import android.os.Bundle;  
import android.app.Activity;  
import android.app.PendingIntent;  
import android.content.Intent;  
import android.telephony.SmsManager;  
import android.view.Menu;  
import android.view.View;  
import android.view.View.OnClickListener;  
import android.widget.Button;  
import android.widget.EditText;  
import android.widget.Toast;  
  
public class MainActivity extends Activity {  
  
    EditText mobileno,message;  
    Button sendsms;  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
          
        mobileno=(EditText)findViewById(R.id.editText1);  
        message=(EditText)findViewById(R.id.editText2);  
        sendsms=(Button)findViewById(R.id.button1);  
          
    //Performing action on button click  
        sendsms.setOnClickListener(new OnClickListener() {  
              
            @Override  
            public void onClick(View arg0) {  
                String no=mobileno.getText().toString();  
                String msg=message.getText().toString();  
                  
                //Getting intent and PendingIntent instance  
                Intent intent=new Intent(getApplicationContext(),MainActivity.class);  
                PendingIntent pi=PendingIntent.getActivity(getApplicationContext(), 0, intent,0);  
                  
                //Get the SmsManager instance and call the sendTextMessage method to send message  
                SmsManager sms=SmsManager.getDefault();  
                sms.sendTextMessage(no, null, msg, pi,null);  
                  
                Toast.makeText(getApplicationContext(), "Message Sent successfully!",  
                    Toast.LENGTH_LONG).show();  
            }  
        });  
    }  
  
    @Override  
    public boolean onCreateOptionsMenu(Menu menu) {  
        // Inflate the menu; this adds items to the action bar if it is present.  
        getMenuInflater().inflate(R.menu.activity_main, menu);  
        return true;  
    }  
      
}