package it372.dynamicwidgets;
import androidx.appcompat.app.AppCompatActivity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {

    // Define instance variables.
    private int numWords=5, wordIndex=0;
    private LinearLayout layout;
    private String[ ] words =
        {"one", "two", "three", "four", "five"};

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

        // Create LinearLayout object.
        layout = findViewById(R.id.linear_layout);

        // Instantiate widgets
        final TextView txtWord = new TextView(this);
        final Button btnNextWord = new Button(this);

        // Set text in widgets
        txtWord.setText("zero");
        btnNextWord.setText("NEXT WORD");

        // Set textSize for widgets
        txtWord.setTextSize(24);
        btnNextWord.setTextSize(24);

        // Set layout parameters for widgets
        LinearLayout.LayoutParams params =
            new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.WRAP_CONTENT,
                LinearLayout.LayoutParams.WRAP_CONTENT);
        params.setMargins(50, 50, 0, 0);
        txtWord.setLayoutParams(params);
        btnNextWord.setLayoutParams(params);

        // Set color of TextView widget to maroon.
        txtWord.setTextColor(Color.parseColor("#FF800000"));

        // Place widgets in LinearLayout (important!)
        layout.addView(txtWord);
        layout.addView(btnNextWord);
 
        // Set onListener for button using 
        // Method 4 (anonymous lambda method).
        btnNextWord.setOnClickListener( view -> {
            txtWord.setText(words[(wordIndex++ % numWords)]);
        });

        // Set onClickListener for button using 
        // Method 3 (anonymous event listener class).
        /*
        btnNextWord.setOnClickListener(
            new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    txtWord.setText(words[wordIndex++ % numWords]);
                }
        });
        */
    }
}