Mobile Application Development Practical 29
Question 1
Write a program to send and receive sms.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="30dp"
android:layout_marginRight="30dp"
android:layout_marginTop="30dp"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Android SMS"
android:textSize="20dp"
android:textStyle="bold"
android:layout_marginBottom="30dp"
android:gravity="center"/>
<EditText
android:id="@+id/mobileno"
android:layout_width="match_parent"
android:layout_height="50dp"
android:ems="10"
android:hint="Enter Mobile Number" />
<EditText
android:id="@+id/msg"
android:layout_width="match_parent"
android:layout_height="70dp"
android:ems="10"
android:inputType="textMultiLine"
android:hint="Enter Message" />
<Button
android:id="@+id/sendbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="30dp"
android:text="Send" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<uses-permission android:name="android.permission.SEND_SMS"/>
<application
android:allowBackup="true"
android:dataExtractionRules="@xml/data_extraction_rules"
android:fullBackupContent="@xml/backup_rules"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/Theme.Practical29"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>MainActivity.java
package com.example.practical29;
import androidx.appcompat.app.AppCompatActivity;
import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
EditText mobileno,msg;
Button b;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mobileno=findViewById(R.id.mobileno);
msg=findViewById(R.id.msg);
b=findViewById(R.id.sendbutton);
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String num=mobileno.getText().toString();
String text=msg.getText().toString();
try {
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
if (checkSelfPermission(android.Manifest.permission.SEND_SMS)== PackageManager.PERMISSION_GRANTED) {
SmsManager sm = SmsManager.getDefault();
sm.sendTextMessage(num, null, text, null, null);
Toast.makeText(getApplicationContext(), "Sms sent", Toast.LENGTH_LONG).show();
} else
requestPermissions(new String[]{Manifest.permission.SEND_SMS}, 1);
}
}
catch (Exception e){
e.printStackTrace();
Toast.makeText(getApplicationContext(),"Sending sms failed",Toast.LENGTH_LONG).show();
}
}
});
}
}Output
