Android send SMS automatically on button click

Question

I am trying to automatically send SMS message to a certain number when the user presses a button on the screen.

This is my code:

Intent smsIntent = new Intent(Intent.ACTION_SENDTO,
Uri.parse("sms:xxxxxxxxxxx")); 
smsIntent.putExtra("sms_body", "Hello");
startActivity(smsIntent);

xxxxxxx = phone number

I have the following permissions:

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

When I press the button it takes me to another screen where I can edit my text and press Send. I just want it to do this process automatically without taking me to another screen. As I've already defined my message, I just want to send it to a particular number.

And also I am not sure if I put the corrent phone number in the second line of code. Do I have to put my country code in there first or can I just put my mobile phone number and it will work?

Thank you

Answer 1

You can use the build in Intent also:

 buttonSendSms_intent.setOnClickListener(new Button.OnClickListener(){

       @Override
       public void onClick(View arg0) {
        // TODO Auto-generated method stub

        String smsNumber = edittextSmsNumber.getText().toString();
        String smsText = edittextSmsText.getText().toString();

        Uri uri = Uri.parse("smsto:" + smsNumber);
        Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
        intent.putExtra("sms_body", smsText);  
        startActivity(intent);
       }});

Answer 2

the easy way is to use SmsManager.Telephony.

Answer 3

Try this

private static final String SMS_SENT_INTENT_FILTER = "com.yourapp.sms_send";
private static final String SMS_DELIVERED_INTENT_FILTER = "com.yourapp.sms_delivered";

String message = "hey, this is my message";

String phnNo = " " //preferable use complete international number

PendingIntent sentPI = PendingIntent.getBroadcast(this, 0, new Intent(
                SMS_SENT_INTENT_FILTER), 0);
PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0, new Intent(
                SMS_DELIVERED_INTENT_FILTER), 0);

SmsManager sms = SmsManager.getDefault();
sms.sendTextMessage(phnNo, null, message, sentPI, deliveredPI);

Answer 4

First set following permissions:

<uses-permission android:name="android.permission.SEND_SMS"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>

then create following activity:

    <?xml version="1.0" encoding="utf-8"?>
    <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">

        <EditText
            android:id="@+id/editText"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="41dp"
            android:layout_marginLeft="41dp"
            android:layout_marginRight="41dp"
            android:layout_marginStart="41dp"
            android:layout_marginTop="43dp"
            android:ems="10"
            android:hint="Enter Phone no"
            android:inputType="textPersonName"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <EditText
            android:id="@+id/editText2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="37dp"
            android:layout_marginLeft="37dp"
            android:layout_marginRight="37dp"
            android:layout_marginStart="37dp"
            android:layout_marginTop="28dp"
            android:ems="10"
            android:hint="Enter text"
            android:inputType="textPersonName"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/editText" />

        <Button
            android:id="@+id/button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="183dp"
            android:text="SEND"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent" />
    </android.support.constraint.ConstraintLayout> 

Now go to your MainActivity.java File and add following code:

public class MainActivity extends AppCompatActivity {

    EditText e1, e2;
    Button b1;
    private final static int SEND_SMS_PERMISSION_REQ=1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        e1=findViewById(R.id.editText);
        e2=findViewById(R.id.editText2);
        b1=findViewById(R.id.button);
        b1.setEnabled(false);


        if(checkPermission(Manifest.permission.SEND_SMS))
        {
            b1.setEnabled(true);
        }
        else
        {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.SEND_SMS}, SEND_SMS_PERMISSION_REQ);
        }
        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String s1=e1.getText().toString();
                String s2=e2.getText().toString();
                if(!TextUtils.isEmpty(s1)&&!TextUtils.isEmpty(s2))
                {

                    if(checkPermission(Manifest.permission.SEND_SMS))
                    {
                        SmsManager smsManager=SmsManager.getDefault();
                         smsManager.sendTextMessage(s1,null,s2,null,null);
                    }
                    else {
                        Toast.makeText(MainActivity.this, "Permission Denied", Toast.LENGTH_SHORT).show();
                    }
                }
                else
                {
                    Toast.makeText(MainActivity.this, "Permission denied", Toast.LENGTH_SHORT).show();
                }
            }
        });

    }

    private boolean checkPermission(String sendSms) {

        int checkpermission= ContextCompat.checkSelfPermission(this,sendSms);
        return checkpermission== PackageManager.PERMISSION_GRANTED;
    }


    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode)
        {
            case SEND_SMS_PERMISSION_REQ:
                if(grantResults.length>0 &&(grantResults[0]==PackageManager.PERMISSION_GRANTED))
                {
                    b1.setEnabled(true);
                }
                break;
        }
    }
}

Done it successfully.

Answer 5

Try this code:

 String messageToSend = "this is a message";
 String number = "2121234567";

 SmsManager.getDefault().sendTextMessage(number, null, messageToSend, null,null);

With regards to the number, you need to enter the number as if you were calling it from the phone or sending an sms message in the normal manner.