edtinput cannot be resolved or is not a field

سلام دوستان

این متن یه ارروی میده هر چی به چشم خورد نتونستم اررور رو بگیرم

ارروری که میده توی خط 28 و edtinput و اررور میده

package tichi.mystartup4.n;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;


public class Mystartup4newActivity extends Activity {

    public int counter;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        final TextView txtCaption = (TextView) findViewById(R.id.txtCoption);
        final Button btnClickonme = (Button) findViewById(R.id.btnClickonme);
        final Button btnchange = (Button) findViewById(R.id.btnchange);
        final Button btncompute = (Button) findViewById(R.id.btncompute);
        final EditText edtinput = (EditText) findViewById(R.id.edtinput);

        edtinput.setText("some value");
        String text = edtinput.getText().toString();

        for (int i = 0; i < 1; i++) {
            Toast.makeText(Mystartup4newActivity.this, "sometext", Toast.LENGTH_SHORT).show();
            txtCaption.setText("I is: " + i);
            txtCaption.setTextColor(Color.parseColor("#00ff00"));
            txtCaption.setBackgroundColor(Color.parseColor("#7f7f7f"));
            txtCaption.setTextSize(40);

            //String text = edtcahnge.getText().toString();

            txtCaption.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View arg0) {
                    Toast.makeText(Mystartup4newActivity.this, "Text Clicked", Toast.LENGTH_SHORT).show();
                    counter++;
                    txtCaption.setText("counter is : " + counter);
                }
            });

            btnClickonme.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View arg0) {

                    if (txtCaption.getVisibility() == View.INVISIBLE) {

                        txtCaption.setVisibility(View.VISIBLE);
                        Toast.makeText(Mystartup4newActivity.this, "Text Visible", Toast.LENGTH_SHORT).show();

                    } else {
                        txtCaption.setVisibility(View.INVISIBLE);
                        Toast.makeText(Mystartup4newActivity.this, "Text Invisible", Toast.LENGTH_SHORT).show();
                    }

                }
            });
            btnchange.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View arg0) {
                    Toast.makeText(Mystartup4newActivity.this, "Ttext clicked", Toast.LENGTH_SHORT).show();
                    counter++;
                    String text = edtinput.getText().toString();
                    txtCaption.setText(text + " " + counter);
                }
            });

            btncompute.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View arg0) {
                    int intvalue = Integer.parseInt(edtinput.getText().toString());
                    txtCaption.setText(" " + intvalue * 2);

                }

            });
        }
    }
}