mainact

package com.example.nickiminaj;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.NotificationCompat;
import androidx.core.app.NotificationManagerCompat;

import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

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

        getWindow().setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);

        Button btn1 = findViewById(R.id.btn1);
        Button btn2 = findViewById(R.id.btn2);

        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                TextView tv1 = (TextView) findViewById(R.id.tv1);
                tv1.setText("ARMY? delete 💜");

                NotificationCompat.Builder builder  = new NotificationCompat.Builder(MainActivity.this,CHANNEL_ID)
                        .setSmallIcon(R.drawable.nyam)
                        .setContentTitle("meow")
                        .setContentText("..meow meow .. meow")
                        .setPriority(NotificationCompat.PRIORITY_DEFAULT);

                NotificationManagerCompat notificationManager = NotificationManagerCompat.from(MainActivity.this);
                notificationManager.notify(0, builder.build());
                createNotificationChannel();
            }
        });

        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                TextView tv1 = (TextView) findViewById(R.id.tv1);
                tv1.setText("ARMY? no delete 💜");


                NotificationCompat.Builder builder  = new NotificationCompat.Builder(MainActivity.this,CHANNEL_ID)
                        .setSmallIcon(R.drawable.nyam)
                        .setContentTitle("RRRRrrrrr")
                        .setContentText("..arrf arf .. arrrrffff")
                        .setPriority(NotificationCompat.PRIORITY_DEFAULT);

                NotificationManagerCompat notificationManager = NotificationManagerCompat.from(MainActivity.this);
                notificationManager.notify(0, builder.build());
                createNotificationChannel();
            }

        });
    }

    public static final String CHANNEL_ID = "mychannel";
    NotificationChannel channel;

    private void createNotificationChannel(){

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){

            int importance = NotificationManager.IMPORTANCE_DEFAULT;
            channel = new NotificationChannel(CHANNEL_ID, "mynotif", importance);
            channel.setDescription("channel");

            NotificationManager notificationManager = getSystemService(NotificationManager.class);
           notificationManager.createNotificationChannel(channel);
        }
    }


}