Code for Previous most Activity directly with out re calling the Activity

Code for
FirstActivity   ---> SecondActivity  ---> ThirdActivity

backPress: Thied ---> Second --->  First

When you click the GoToMainActivity button in ThiredActivity it will directly go to MainActivity by finishing the SecondActivity also

MainActivity ;
--------------


public class MainActivity extends Activity {
private Button next;

public static boolean back = false;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        next = (Button) findViewById(R.id.next);
    next.setText("First");
    }
   
    public void nextActivity(View view){
Intent intent = new Intent(MainActivity.this, SecondActivity.class);
startActivity(intent);
}  
   
}


SecondActivity :
----------------

public class SecondActivity extends Activity {
private Button next;

public static boolean back = false;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        next = (Button) findViewById(R.id.next);
        next.setText("Second");
    }
   
    public void nextActivity(View view){    
Intent intent = new Intent(SecondActivity.this, ThirdActivity.class);
startActivity(intent);
}
   
@Override
    public void onResume(){
        super.onResume();
        /*
         * check the cundition wether user click the recomencer button if click colose this activity else resume the activity
         */
       
        if(back!= false){      
back();
}
    }
   
    public void GoBack(View view){
back();
}
/*
* this ethode is usefull to finish this activity when click recomencer button click
*/
public void back(){
finish();
back = false;
}
   
}



ThirdActivity ;
--------------


public class ThirdActivity extends Activity {
private Button next;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        next = (Button) findViewById(R.id.next);
    next.setText("Go to MainActivity");
    }
   
    public void nextActivity(View view){
    SecondActivity.back = true;
    finish();
}  
   
}

main.xml:
----------


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:paddingLeft="16dp"
    android:paddingRight="16dp" >
    <Button
        android:id="@+id/next"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="15dp"
        android:onClick="nextActivity"
        android:text="first" />

</RelativeLayout>