Help with EditText function

[neosephiroth86]

hi!I need to create in Android a number of layouts for my input(every layout will be the input to manage the resource of a single process,and I will have a non finite number of them).the input layout code will be called recursively.I have a problem,the program crashes if I change the edittext field in a iteration superior to 1,I simplified my code to try to find the problem.By clicking the button "avanti" I can simply go to the main layout and the out layout.
As you can see if a edit the edittext in the next layout (after I press the button) it shows me that input right,if I try to change it in my next iteration the program crashes.Can u help me?thanks

package com.test; 

import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TextView; 
import java.util.Vector; 

public class test extends Activity { 

EditText quantita; 

public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
inizio(); 

} 


public void inizio(){ 
setContentView(R.layout.main); 

Button button01 = (Button)findViewById(R.id.Button01); 
button01.setOnClickListener( new Button.OnClickListener(){ 
public void onClick(View view) { 
quantita =(EditText)findViewById(R.id.EditText01); 
int quantita1=Integer.parseInt(quantita.getText().toString()); 
setContentView(R.layout.out); 
TextView test=(TextView)findViewById(R.id.TextView01); 
test.setText(""+quantita1); 
Button avanti = (Button)findViewById(R.id.avanti); 
avanti.setOnClickListener( new Button.OnClickListener(){ 
public void onClick(View view) { 
inizio(); 

} 
}); 
} 

}); 
} 
}

main.xml
[syntax="xml"]<AbsoluteLayout android:id="@+id/AbsoluteLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"><EditText android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/EditText01" android:layout_y="156dip" android:layout_x="109dip" android:numeric="integer" android:text="0" android:editable="true" android:enabled="true"></EditText>
<Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/Button01" android:layout_x="73dip" android:layout_y="282dip" android:text="avanti"></Button>

out.xml
<AbsoluteLayout android:id="@+id/AbsoluteLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"><TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/TextView01" android:layout_y="124dip" android:layout_x="75dip"></TextView>
<Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_x="100dip" android:layout_y="65dip" android:text="avanti" android:id="@+id/avanti"></Button>
</AbsoluteLayout>