view_context.java

public class MainActivity extends AppCompatActivity {

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

        Log.e("Activity context is", String.valueOf(this));

        Button button = findViewById(R.id.btn);
        button.setOnClickListener(view -> {
            Log.e("View context is", String.valueOf(view.getContext()));
        });
    }
}