bounded services

activity_main.xml
=====================
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center" >

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="32sp"
        android:text="Start"
        android:background="#055A05"
        android:textColor="#fff"
        android:layout_marginBottom="30dp"
        android:id="@+id/btnStart"
        />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="32sp"
        android:text="Stop"
        android:background="#E92020"
        android:textColor="#fff"
        android:id="@+id/btnStop"
        />
</LinearLayout>


MainActivity.java
=========================
package com.wtf.myboundedservices;

import androidx.appcompat.app.AppCompatActivity;

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    Context context;
    boolean isConnected=false; //indicates if our service is bounded or not
    //Activit's instance variable to contain our bounded service
    BoundedService boundedService;

    //service connection used to catch bounded service from caller side
    ServiceConnection serviceConnection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            //my binder is a container for bounded service (כרטיס כספומט)
            MyBinder caspomat = (MyBinder)service;
            //connect to bounded service using our binder
            boundedService = caspomat.bindService;
            boundedService.firstBinding();
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {

        }
    };

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

    private void setPointer() {
        this.context=this;
        final Intent myBoundedService = new Intent(this,BoundedService.class);
        findViewById(R.id.btnStart).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!isConnected){
                    isConnected=true;
                    bindService(myBoundedService,serviceConnection,Context.BIND_AUTO_CREATE);
                } else {
                        Toast.makeText(context, "Rimon, service is already connected!!", Toast.LENGTH_SHORT).show();
                }
            }
        });
        findViewById(R.id.btnStop).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (isConnected){
                    unbindService(serviceConnection);
                }
            }
        });
    }
}


MyBinder.java
==============
package com.wtf.myboundedservices;

import android.os.Binder;

public class MyBinder extends Binder {
    public BoundedService bindService;

}


BoundedService.java
=========================
package com.wtf.myboundedservices;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;

import androidx.annotation.Nullable;

public class BoundedService extends Service {

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        Toast.makeText(this, "service is bounded", Toast.LENGTH_SHORT).show();
        //create a binder for data transfer
        MyBinder binder = new MyBinder();
        binder.bindService=this; //MyBinder -> container to transfer bounded services to the activity
        return binder;
    }

    @Override
    public boolean onUnbind(Intent intent) {
        Toast.makeText(this, "love to see you go, hate to see you leave", Toast.LENGTH_LONG).show();
        return super.onUnbind(intent);
    }

    @Override
    public void onRebind(Intent intent) {
        Toast.makeText(this, "Welcome back Shani", Toast.LENGTH_LONG).show();
        super.onRebind(intent);
    }

    public boolean uploadPicture(String fileName){
        try {
            Toast.makeText(this, "pic " + fileName + " was uploaded to Rimon ...", Toast.LENGTH_SHORT).show();
            return true;
        } catch (Exception e){
            Log.e("err", "uploadPicture: "+e.getMessage());
        }
        return false;
    }

    public void uskut (String name){
        Toast.makeText(this, "Uskut !!! "+name+", Ya zalama!!!!", Toast.LENGTH_SHORT).show();
    }

    public void firstBinding(){
        Toast.makeText(this, "enter Metronit code", Toast.LENGTH_SHORT).show();
    }
}


Manifest.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"
    package="com.wtf.myboundedservices">

    <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"
        tools:ignore="GoogleAppIndexingWarning">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service android:name=".BoundedService"/>
    </application>

</manifest>