Broadcast receivers example

AirplaneModeBroadcastReceiever.kt

package com.seniru.broadcastreceiverexample

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.util.Log
import android.widget.Toast

class AirplaneModeBroadcastReceiver : BroadcastReceiver() {
    override fun onReceive(context: Context?, intent: Intent?) {
        Toast.makeText(context, "Airplane mode changed", Toast.LENGTH_LONG).show()
        Log.i("AirplaneMode", intent?.data.toString())
    }
}

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">

    <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:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.BroadcastReceiverExample"
        tools:targetApi="31">

        <receiver android:name=".CustomEventBroadcastReceiver" android:exported="false">
            <intent-filter>
                <action android:name="com.seniru.TEST_ACTION" />

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </receiver>


        <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>

CustomEventBroadcastReceiever.kt

package com.seniru.broadcastreceiverexample

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.widget.Toast

class CustomEventBroadcastReceiver : BroadcastReceiver() {

    override fun onReceive(context: Context?, intent: Intent?) {
        Toast.makeText(context, "Button click event", Toast.LENGTH_SHORT).show()
    }

}

MainActivity.kt

package com.seniru.broadcastreceiverexample

import android.os.Bundle
import android.widget.Button
import androidx.core.content.ContextCompat
import androidx.appcompat.app.AppCompatActivity
import android.content.IntentFilter
import android.content.Intent

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val button: Button = findViewById(R.id.button)
        button.setOnClickListener {
            // send broadcast action to the receiver
            val intent = Intent()
            intent.action = "com.seniru.TEST_ACTION"
            sendBroadcast(intent)
        }

        // system message broadcast message receiver
        val filter = IntentFilter(Intent.ACTION_AIRPLANE_MODE_CHANGED)
        registerReceiver(AirplaneModeBroadcastReceiver(), filter)

        // custom event broadcast message receiver
        val customEventFilter = IntentFilter("com.seniru.TEST_ACTION")
        ContextCompat.registerReceiver(this, CustomEventBroadcastReceiver(), customEventFilter, ContextCompat.RECEIVER_NOT_EXPORTED)

    }
}