การใช้งาน Debugging (LogCat) ในการเขียน Android บนโปรแกรม Eclipse IDE (Android-Eclipse)

package com.myapp;

import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.app.Activity;
import android.util.Log;

public class MainActivity extends Activity {
	
	int i =0;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		// textView1
		final TextView txtView1 = (TextView) findViewById(R.id.textView1);
		
		// button1 (i = i + 1)
        final Button btn1 = (Button) findViewById(R.id.button1);
        btn1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                i = i + 1;
                Log.d("Step 1","i = " + i);
                
                txtView1.setText("i = " + i); // Show on textView1
            }
        });
        
		// button2 (i = i + 2)
        final Button btn2 = (Button) findViewById(R.id.button2);
        btn2.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                i = i + 2;
                Log.d("Step 2","i = " + i);
                
                txtView1.setText("i = " + i); // Show on textView2
            }
        });
	}
	

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

}