How to control audio or ringtone settings of your Android phone remotely without Internet using SMS?

This video explains the steps that how the audio settings of your android phone can be controlled using an Android App from another phone. In this concept, you do not need internet settings and the settings will be controlled using SMS. So, basically 2 steps are shown here in this video. 1st is how to send SMS to the phone number of controlled device. 2nd how to read the SMS and do the respective operation as mentioned in the SMS.

This kind of Apps are useful, if you want to make the sound of your Phone audible in case it is lost somewhere in your home or workplace. In this concept, you can also use any phone to send a SMS message of predefined template and the controlled phone will react accordingly.

We will be glad to hear from you regarding any query, suggestions or appreciations at: programmerworld1990@gmail.com

Source Code:

package com.example.myreingtoneremotecontrol;

import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.media.AudioManager;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Settings;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;

import java.util.Timer;
import java.util.TimerTask;

import static android.Manifest.permission.ACCESS_NOTIFICATION_POLICY;
import static android.Manifest.permission.READ_SMS;
import static android.Manifest.permission.SEND_SMS;

public class MainActivity extends AppCompatActivity {

private TextView textView;
private Cursor cursor;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

textView = findViewById(R.id.textView);
ActivityCompat.requestPermissions(MainActivity.this,new String[]{ACCESS_NOTIFICATION_POLICY, SEND_SMS, READ_SMS}, PackageManager.PERMISSION_GRANTED);

NotificationManager notificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);

if (!notificationManager.isNotificationPolicyAccessGranted()){
//Ask the user permission
Intent intent = new Intent((Settings.ACTION_NOTIFICATION_POLICY_ACCESS_SETTINGS));
startActivity(intent);
}

Timer timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {

cursor = getContentResolver().query(Uri.parse(“content://sms”), null, null, null, null);
cursor.moveToFirst();

if (cursor.getString(12).equalsIgnoreCase(“Mute”)){
((AudioManager)getSystemService(Context.AUDIO_SERVICE)).setRingerMode(AudioManager.RINGER_MODE_SILENT);

runOnUiThread(new Runnable() {
@Override
public void run() {
textView.setText(“Audio MUTED”);
}
});

}

if (cursor.getString(12).equalsIgnoreCase(“UnMute”)){
((AudioManager)getSystemService(Context.AUDIO_SERVICE)).setRingerMode(AudioManager.RINGER_MODE_NORMAL);

runOnUiThread(new Runnable() {
@Override
public void run() {
textView.setText(“Audio UN-MUTED”);
}
});
}

}
}, 0 , 2000);

}

public void MuteButton(View view){

String number = “999999”;
String message = “Mute”;

SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(number, null, message, null, null);
}

public void UnMuteButton(View view){
String number = “999999”;
String message = “UnMute”;

SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(number, null, message, null, null);

}
}

<?xml version=”1.0″ encoding=”utf-8″?>
<manifest xmlns:android=”http://schemas.android.com/apk/res/android”
package=”com.example.myreingtoneremotecontrol”>

<uses-permission android:name=”android.permission.ACCESS_NOTIFICATION_POLICY”/>
<uses-permission android:name=”android.permission.SEND_SMS”/>
<uses-permission android:name=”android.permission.READ_SMS”/>
<uses-permission android:name=”android.permission.RECEIVE_SMS”/>

<application
android:allowBackup=”true”
android:icon=”@mipmap/ic_launcher”
android:label=”@string/app_name”
android:roundIcon=”@mipmap/ic_launcher_round”
android:supportsRtl=”true”
android:theme=”@style/AppTheme”>
<activity android:name=”.MainActivity”>
<intent-filter>
<action android:name=”android.intent.action.MAIN” />

<category android:name=”android.intent.category.LAUNCHER” />
</intent-filter>
</activity>
</application>

</manifest>