Use applicaiton while mobile is locked android studio

Question

how to make application in android studio that work while mobile is locked. suppose in any emergency situation if the user swipe on mobile or press lock button 2 times it will send its location to the saved emergency numbers while mobile is locked. Any Idea?

Answer 1

Since your application is not in use and you want to listen to some specific event and perform a specific task, you should use a Service. You can create a LockService as explained in this answer.

https://stackoverflow.com/a/30030372/4491971

Instead of starting activity as explained in that answer, you can write your operation for sending the location to the saved emergency numbers.

package com.example.userpresent;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.util.Log;

public class ScreenReceiver extends BroadcastReceiver {

    public static boolean wasScreenOn = true;

    @Override
    public void onReceive(final Context context, final Intent intent) {
       if(intent.getAction().equals(Intent.ACTION_USER_PRESENT)) {
            // YOUR OPERATION CAN BE DONE HERE
        }
    }
}