Viewpager Slide button tab to change color

Package Com.example.day8viewpager;

Import java.util.ArrayList;
Import java.util.List;

Import Android.os.Bundle;

Import android.app.Activity;
Import Android.graphics.Color;
Import Android.support.v4.view.ViewPager;
Import Android.support.v4.view.ViewPager.OnPageChangeListener;
Import Android.view.Menu;
Import Android.view.View;
Import Android.view.View.OnClickListener;
Import Android.widget.Button;

public class Mainactivity extends Activity implements Onclicklistener {

Private Button button1;
Private Button button2;
Private Button Button3;
Private Viewpager Viewpager;
Private list<view> List;

@Override
protected void onCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.activity_main);
//Set false data, Viewpager each item to display
SetData ();
button1 = (Button) Findviewbyid (r.id.button1);
Button2 = ( Button) Findviewbyid (R.id.button2);
Button3 = (Button) Findviewbyid (R.id.button3);
Button1.setonclicklistener (this);
Button2.setonclicklistener (this);
Button3.setonclicklistener (this);
Viewpager = (viewpager) Findviewbyid (R.id.viewpager);
//set adapter;
Viewpager.setadapter (new Mypageradapter (list));
//Set Viewpager default view shown when first come in;
Viewpager.setcurrentitem (0);
//First load the text color of the button corresponding to the Viewpager page
Setbuttoncolor (Viewpager.getcurrentitem ());

//viewpager page Change listener
Viewpager.setonpagechangelistener (new Onpagechangelistener () {
//viewpager view currently displayed
@Override
public void onpageselected (int arg0) {
//TODO auto-generated method Stub
Setbuttoncolor (ARG0);
}
//viewpager the sliding distance, and the displayed view; parameter one: The view to be displayed, parameter two: The offset of the slide; parameter three: sliding pixels
@Override
public void onpagescrolled (int arg0, float arg1, int arg2) {
//TODO auto-generated method stub

}
//Current page Change status
//stop status Scroll_state_idle 0
//drag state Scroll_state_ Dragging 1
//fixed state scroll_state_settling 2
@Override
public void onpagescrollstatechanged (int arg0) {
// TODO auto-generated method Stub

}
});
}
/**
* Sets the color of the button
* @param i viewpager the position of the current page
*/
private void Setbuttoncolor (int. Item) {
//TODO auto-generated Method stub
Switch (CurrentItem) {
Case 0:
Button1.settextcolor (color.white );
Button2.settextcolor (Color.Black);
Button3.settextcolor (Color.Black);
Break;

Case 1:
Button2.settextcolor (Color.White);
Button1.settextcolor (Color.Black);
Button3.settextcolor (Color.Black);
Break
Case 2:
Button3.settextcolor (Color.White);
Button1.settextcolor (Color.Black);
Button2.settextcolor (Color.Black);
Break

}
}
/**
* Set false data, Viewpager each item to display the content
*/
private void SetData () {
List = new arraylist<view> ();
View view1=view.inflate (mainactivity.this, r.layout.one, NULL);
View view2=view.inflate (mainactivity.this, r.layout.two, NULL);
View view3=view.inflate (mainactivity.this, r.layout.three, NULL);
List.add (View1);
List.add (VIEW2);
List.add (VIEW3);
}

@Override
public void OnClick (View v) {
TODO auto-generated Method Stub
Switch (V.getid ()) {
Case R.id.button1:
Viewpager.setcurrentitem (0);
Break

Case R.id.button2:
Viewpager.setcurrentitem (1);
Break
Case R.ID.BUTTON3:
Viewpager.setcurrentitem (2);
Break

}
}

}

Viewpager Slide button tab to change color