Another ? Why error on this line?

[mojo69]

setContentView(R.layout.main);

the editor is telling that main cannot be resolved or is not a field. Here is the full code. There is a main.xml in the layout folder.

[B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]import
[/COLOR][/SIZE][/COLOR][/SIZE][/B][LEFT][SIZE=2]android.R;[/SIZE]
[LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]import[/LEFT]
[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B][LEFT][SIZE=2]android.app.Activity;[/SIZE]
[LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]import[/LEFT]
[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B][LEFT][SIZE=2]android.os.Bundle;[/SIZE]
 
[LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]import[/LEFT]
[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B][LEFT][SIZE=2]android.content.Intent;[/SIZE]
[LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]import[/LEFT]
[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B][LEFT][SIZE=2][U]android.os.Bundle[/U];[/SIZE]
[LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]import[/LEFT]
[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B][LEFT][SIZE=2]android.view.View;[/SIZE]
[LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]import[/LEFT]
[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B][LEFT][SIZE=2]android.widget.Button;[/SIZE]
 
[LEFT][SIZE=2]　[/SIZE]
[B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]public[/LEFT]
[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][/B][LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]class[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] MainActivity [/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]extends[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] Activity {[/SIZE]
[LEFT][SIZE=2][COLOR=#3f5fbf][SIZE=2][COLOR=#3f5fbf]/** Called when the activity is first created. */[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][COLOR=#3f5fbf]
[/COLOR][/SIZE][SIZE=2][COLOR=#646464][SIZE=2][COLOR=#646464]@Override[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][COLOR=#646464]
[/COLOR][/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]public[/COLOR][/SIZE][/COLOR][/SIZE][/B][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]void[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] onCreate(Bundle savedInstanceState) {[/SIZE][/LEFT]
 
[LEFT][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]super[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2].onCreate(savedInstanceState);[/SIZE]
[SIZE=2]setContentView(R.layout.[U]main[/U]);[/SIZE][/LEFT]
 
[LEFT][SIZE=2]Button next = (Button) findViewById(R.id.[/SIZE][I][SIZE=2][COLOR=#0000c0][SIZE=2][COLOR=#0000c0]button1[/COLOR][/SIZE][/COLOR][/SIZE][/I][SIZE=2]);[/SIZE][/LEFT]
 
[LEFT][SIZE=2]next.setOnClickListener([/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]new[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] View.OnClickListener() {[/SIZE]
[B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]public[/COLOR][/SIZE][/COLOR][/SIZE][/B][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]void[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] onClick(View view) {[/SIZE]
[SIZE=2]Intent myIntent = [/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]new[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2] Intent(view.getContext(), DropOff.[/SIZE][B][SIZE=2][COLOR=#7f0055][SIZE=2][COLOR=#7f0055]class[/COLOR][/SIZE][/COLOR][/SIZE][/B][SIZE=2]);[/SIZE]
[SIZE=2]startActivityForResult(myIntent, 0);[/SIZE]
[SIZE=2]}[/SIZE][/LEFT]
 
[LEFT][SIZE=2]});[/SIZE][/LEFT]
 
 
[LEFT][SIZE=2]}[/SIZE][/LEFT]
[SIZE=2][COLOR=#3f5fbf]
[/COLOR][/SIZE]
[SIZE=2]}[/SIZE]

[/LEFT]