Small Button (Button) - Android Widgets Example

package com.myapp;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
import android.app.AlertDialog;
import android.widget.Button;
import android.graphics.*;

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        final AlertDialog.Builder adb = new AlertDialog.Builder(this);
        
        // editText1
        final TextView editTxt = (TextView)findViewById(R.id.editText1);
        
        // button1 Event
        final Button btn = (Button) findViewById(R.id.button1);
        btn.setTextColor(Color.RED);
        btn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // Perform action on click
                AlertDialog ad = adb.create();
                String strTxt = editTxt.getText().toString();
                //ad.setMessage(editTxt.getText());
                ad.setMessage("Sawatdee khun : " + strTxt);
                ad.show();
            }
        });
             
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

}