Use OnClickListeners for All Categories - onCreate method in MainActivity.java

onCreate method in MainActivity.java

// Find the View that shows the numbers category
TextView numbers = (TextView) findViewById(R.id.numbers);

// Set a click listener on that View
numbers.setOnClickListener(new View.OnClickListener() {
   // The code in this method will be executed when the numbers View is clicked on.
   @Override
   public void onClick(View view) {
       Intent numbersIntent = new Intent(MainActivity.this, NumbersActivity.class);
       startActivity(numbersIntent);
   }
});

Can anyone explain this line of code please!

The first Parameter you are passing is the context of current activity because in case you want to press back after going to the next activity it'll act as a link and the next one is pretty self explanatory (it is passing the class you want to go to after clicking on the view).

Hello, fellow coders.

I am sharing code based on my development environment as below.
I am using Android Studio 4.2.2, Build #AI-202.7660.26.42.7486908, built on June 24, 2021, Runtime version: 11.0.8+10-b944.6842174 amd64, VM: OpenJDK 64-Bit Server VM by N/A
openjdk version "11.0.10" 2021-01-19
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.10+9)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.10+9, mixed mode)

The MainActivity.java code is look like this and it works for me.
Hope this is helpful for someone out there. Happy coding!

``
package com.tutorial.android.miwok;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

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

     TextView numbers = findViewById(R.id.numbers);
     numbers.setOnClickListener(view -> {

        Intent numbersIntent = new Intent(this, NumbersActivity.class);
        startActivity(numbersIntent);
    });

    TextView family = findViewById(R.id.family);

    family.setOnClickListener(view -> {
        Intent familyIntent = new Intent(this, FamilyActivity.class);
        startActivity(familyIntent);
    });

    TextView colors = findViewById(R.id.colors);

    colors.setOnClickListener(view -> {

        Intent colorsIntent = new Intent(this, ColorsActivity.class);
        startActivity(colorsIntent);
    });

    TextView phrases = findViewById(R.id.phrases);

    phrases.setOnClickListener(view -> {

        Intent phrasesIntent = new Intent(this, PhrasesActivity.class);
        startActivity(phrasesIntent);
    });
}

}

Note: If you don't want to create a Intent class, you can simply call the Intent constructor INSIDE the startActivity() method, like this:

TextView numbers = findViewById(R.id.numbers);

    numbers.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v){
            startActivity(new Intent(MainActivity.this, NumbersActivity.class));
        }
    });
}

This is actually nice