以下是我用来启动Circlepageindicator的MainActivity，
import android.os.Bundle;import android.support.v4.app.FragmentActivity;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.view.View;import android.view.Window;import android.widget.Button;public class MainActivity extends FragmentActivity {ViewPager pager;Button prev,next;@Overrideprotected void onCreate(Bundle savedInstanceState) { this.requestWindowFeature(Window.FEATURE_NO_TITLE); super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); MyPagerAdapter adapter=new MyPagerAdapter(); pager = (ViewPager)findViewById(R.id.view_pager); pager.setAdapter(adapter); pager.setCurrentItem(0); //Bind the title indicator to the adapter CirclePageIndicator titleIndicator = (CirclePageIndicator)findViewById(R.id.titles); titleIndicator.setViewPager(pager); prev = (Button) findViewById(R.id.prev); prev.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // Do something in response to button click pager.setCurrentItem(pager.getCurrentItem() - 1); } }); next = (Button) findViewById(R.id.next); next.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // Do something in response to button click pager.setCurrentItem(pager.getCurrentItem() + 1); } });}@Overridepublic void onBackPressed() { if (pager.getCurrentItem() == 0) { // If the user is currently looking at the first step, allow the system to handle the // Back button. This calls finish() on this activity and pops the back stack. super.onBackPressed(); } else { // Otherwise, select the previous step. pager.setCurrentItem(pager.getCurrentItem() - 1); }}}在Circlepageindicator中，前进（previous）和后退(next)键都可以正常使用，但我想在第一个fragment中隐藏后退键，在最后一个fragment中隐藏前进键，具体应该如何操作呢？
原文：How to hide previous button on first fragment and next button on last fragment in viewpager?
解决方案
答：Aditya Kamath
你可以在ViewPager pager.setOnPageChangeListener中，启用OnPageChangeListener的onPageScrolled方法，实现这种效果：
class PagerChangeListener implements OnPageChangeListener { @Override public void onPageScrolled(int arg0, float arg1, int arg2) { IciciLogger.info(classname, "onPageScrolled"); pageSelected = arg0; switch (pageSelected) { case 0: { preButton.setVisibility(View.INVISIBLE); } break; case 2: { nexButton.setVisibility(View.INVISIBLE); } break; default: { nexButton.setVisibility(View.VISIBLE); preButton.setVisibility(View.VISIBLE); } break; } }}答：Ganesh Katikar
这段代码和简单，我希望能对你有所帮助，只要编写：
// For previous button if(pager.getCurrentItem() == 0){previousBtn.setVisibility(View.GONE);}和
// For Next Button if(pager.getCurrentItem() == YOUR LAST ITEM INDEX) { nextBtn.setVisibility(View.GONE); }即可实现上述效果。
更多详情可以登录：
http://dwij.co.in/greendroid-library-implementation-in-android-project/