Why is my toast application not compiling

    package com.example.toast;

    import androidx.appcompat.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Toast;

    import static android.widget.Toast.LENGTH_LONG;

    public class MainActivity extends AppCompatActivity {

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

     public void fun(View v) {
     Toast t;
     t = Toast.makeText( context:this, resid: "Welcome to Android", Toast.LENGTH_LONG);
     t.show();
    }

The words "conext" and "resid" are highlighted in red so I'm not sure what is going on. The code will not compile and I'm struggling to understand why. I am following the instructions word for word from the book.

I am getting this error:
AAPT: error: not well-formed (invalid token).

Were you watching a video or image and copied the code?

The context: and resid: are IDE hints, not actual text in the method call.

Just Type

 Toast.makeText( MainActivity.this, "Welcome to Android", Toast.LENGTH_LONG).show();

Reason For not showing
you were typing out "context:" and "resid" but in fact, you only need the 3 parameters

1. Context = MainActivity.this in your case
2. Test to show = your custom text
3. Duration of Toast = Toast.LENGTH_SHORT/Toast.LENGTH_LONG depending upon your situation.

Just remove context: and resid: from the arguments. Those are syntax errors in Java, so the code won't compile.

package com.example.toast;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

import static android.widget.Toast.LENGTH_LONG;

public class MainActivity extends AppCompatActivity {

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

  public void fun(View v) {
     Toast t;
     t = Toast.makeText(this, "Welcome to Android", Toast.LENGTH_LONG);
     t.show();
  }
}