Android Studio - İNTERNET BAĞLANTISI ve KULAKLIK DURUMU Gösterme

Mainactivitty.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">

    <TextView
        android:id="@+id/txtInternet"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="İnternet: ?"
        android:textSize="28sp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        android:layout_marginTop="120dp"
        android:layout_marginStart="20dp"/>

    <TextView
        android:id="@+id/txtHeadset"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Kulaklık: ?"
        android:textSize="28sp"
        android:layout_marginTop="20dp"
        app:layout_constraintTop_toBottomOf="@id/txtInternet"
        app:layout_constraintStart_toStartOf="parent"
        android:layout_marginStart="20dp"/>

</androidx.constraintlayout.widget.ConstraintLayout>

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">

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

    <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._1">
        <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>

main.java

package com.example.a1;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    TextView txtInternet, txtHeadset;

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

        txtInternet = findViewById(R.id.txtInternet);
        txtHeadset = findViewById(R.id.txtHeadset);

        // ???? Internet receiver
        IntentFilter internetFilter = new IntentFilter();
        internetFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);

        registerReceiver(internetReceiver, internetFilter);

        // ???? Headset receiver
        IntentFilter headsetFilter = new IntentFilter();
        headsetFilter.addAction(Intent.ACTION_HEADSET_PLUG);

        registerReceiver(headsetReceiver, headsetFilter);

        // ???? app açılırken kulaklık durumunu çek
        updateHeadsetState();
    }

    // ???? INTERNET
    private final BroadcastReceiver internetReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {

            ConnectivityManager cm =
                    (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

            if (cm == null) return;

            NetworkInfo info = cm.getActiveNetworkInfo();

            if (info != null && info.isConnected()) {
                txtInternet.setText("İnternet: VAR ????");
            } else {
                txtInternet.setText("İnternet: YOK ❌");
            }
        }
    };

    // ???? HEADSET PLUG / UNPLUG
    private final BroadcastReceiver headsetReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {

            if (Intent.ACTION_HEADSET_PLUG.equals(intent.getAction())) {

                int state = intent.getIntExtra("state", 0);

                if (state == 1) {
                    txtHeadset.setText("Kulaklık: TAKILI ????");
                    Toast.makeText(context, "Kulaklık takıldı ????", Toast.LENGTH_SHORT).show();
                } else {
                    txtHeadset.setText("Kulaklık: YOK ❌");
                    Toast.makeText(context, "Kulaklık çıkarıldı ❌", Toast.LENGTH_SHORT).show();
                }
            }
        }
    };

    // ???? BAŞLANGIÇ KONTROL (ÖNEMLİ FIX)
    private void updateHeadsetState() {

        IntentFilter filter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);
        Intent intent = registerReceiver(null, filter);

        if (intent != null) {

            int state = intent.getIntExtra("state", 0);

            if (state == 1) {
                txtHeadset.setText("Kulaklık: TAKILI ????");
            } else {
                txtHeadset.setText("Kulaklık: YOK ❌");
            }

        } else {
            txtHeadset.setText("Kulaklık: YOK ❌");
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(internetReceiver);
        unregisterReceiver(headsetReceiver);
    }
}