Internet Checking in Android

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<layout
    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"
    tools:context=".MainActivity">
    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        >


        <Button
            android:id="@+id/button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Button"
            tools:layout_editor_absoluteX="20dp"
            tools:layout_editor_absoluteY="16dp"
            tools:ignore="MissingConstraints" />
    </androidx.constraintlayout.widget.ConstraintLayout>
</layout>

MainActivity.java

package com.androidian.networkchecking;

import androidx.appcompat.app.AppCompatActivity;
import androidx.databinding.DataBindingUtil;

import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

import com.androidian.networkchecking.databinding.ActivityMainBinding;

public class MainActivity extends AppCompatActivity {

    ActivityMainBinding binding;

    ConnectionDetector connectionDetector;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding= DataBindingUtil.setContentView(
                MainActivity.this,R.layout.activity_main);

        connectionDetector=new ConnectionDetector();

        binding.button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if(connectionDetector.isConnect(MainActivity.this)){
                    Toast.makeText(MainActivity.this, "Net is there", Toast.LENGTH_SHORT).show();
                }else {
                    Toast.makeText(MainActivity.this, "No Net", Toast.LENGTH_SHORT).show();
                }

            }
        });
    }
}

ConnectionDetector.java

package com.androidian.networkchecking;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

public class ConnectionDetector {
    public boolean isConnect(Context context){

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

        if(connectivityManager!=null){
            NetworkInfo[] infos=connectivityManager.getAllNetworkInfo();
            if(infos!=null)
                for(int i=0;i<infos.length;i++)
                    if(infos[i].getState()==NetworkInfo.State.CONNECTED){
                        return true;
                    }
        }
        return false;
    }
}

AndoidManifest.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:supportsRtl="true"
        android:theme="@style/Theme.Networkchecking"
        tools:targetApi="31">
        <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>