Live Internet Checker Android Studio JAVA

Create a Class NetworkChangeReceiver

package com.dictionary.navigation;

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

public class NetworkChangeReceiver extends BroadcastReceiver {

    private NetworkChangeListener listener;

    public NetworkChangeReceiver(NetworkChangeListener listener) {
        this.listener = listener;
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction() != null && intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
            boolean isConnected = isNetworkConnected(context);
            listener.onNetworkChanged(isConnected);
        }
    }

    private boolean isNetworkConnected(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (cm != null) {
            NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
            return activeNetwork != null && activeNetwork.isConnected();
        }
        return false;
    }

    public interface NetworkChangeListener {
        void onNetworkChanged(boolean isConnected);
    }
}

MainActivity.Java

package com.creative_developer.liveinternetcheck;

import androidx.appcompat.app.AppCompatActivity;

import android.app.AlertDialog;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.drawable.ColorDrawable;
import android.net.ConnectivityManager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements NetworkChangeReceiver.NetworkChangeListener{

    AlertDialog dialog;
    NetworkChangeReceiver networkChangeReceiver = new NetworkChangeReceiver(this);


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



    }



    //------------------------- Check internet ------------------
    @Override
    protected void onStart() {
        super.onStart();
        registerReceiver(networkChangeReceiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
    }

    @Override
    protected void onStop() {
        super.onStop();
        unregisterReceiver(networkChangeReceiver);
    }

    @Override
    public void onNetworkChanged(boolean isConnected) {
        if (isConnected) {

            if (dialog != null && dialog.isShowing()) {
                dialog.dismiss();
                dialog = null;
            }

        } else {

            if (dialog == null || !dialog.isShowing()) {

                ShowDialog();
            }

        }
    }


    //--------------------------------- Dialog Show --------------------------------
    private void ShowDialog() {

        dialog = new AlertDialog.Builder(MainActivity.this)
                .setView(R.layout.no_internet_dialog)
                .setCancelable(false)
                .create();
        dialog.show();


        dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.R.color.transparent));


        TextView playButton = dialog.findViewById(R.id.playButton);

        playButton.setOnClickListener(view->{

            startActivity(new Intent(getApplicationContext(), GamePlayActivity.class));
        });


    }



}

main_activity.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:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:textSize="22sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

no_internet_dialog.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">

    <androidx.cardview.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="450dp"
        android:layout_marginStart="12dp"
        android:layout_marginEnd="12dp"
        app:cardCornerRadius="20dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            <TextView
                android:id="@+id/textView4"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="16dp"
                android:layout_marginTop="12dp"
                android:layout_marginEnd="16dp"
                android:letterSpacing="0.1"
                android:text="check internet and try again"
                android:textColor="#1C1C1C"
                android:textSize="15sp"
                android:textStyle="bold"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/textView2" />

            <com.airbnb.lottie.LottieAnimationView
                android:id="@+id/internetAnim"
                style="?android:attr/progressBarStyle"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:visibility="visible"
                app:layout_constraintBottom_toTopOf="@+id/textView2"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.5"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.26999998"
                app:layout_constraintVertical_chainStyle="packed"
                app:lottie_autoPlay="true"
                app:lottie_loop="true"
                app:lottie_rawRes="@raw/no_internet_anim" />

            <TextView
                android:id="@+id/textView2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="16dp"
                android:layout_marginTop="24dp"
                android:layout_marginEnd="16dp"
                android:letterSpacing="0.1"
                android:text="Internet Not Available"
                android:textColor="#292929"
                android:textSize="22sp"
                android:textStyle="bold"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.5"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/internetAnim" />

        </androidx.constraintlayout.widget.ConstraintLayout>
    </androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>

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