/** 
* 初始化view 
*/ 
private void initView(){ 
pager = (ViewPager) findViewById(R.id.help_viewpages); 
try { 
Field leftEdgeField = pager.getClass().getDeclaredField("mLeftEdge"); 
Field rightEdgeField = pager.getClass().getDeclaredField("mRightEdge"); 
if (leftEdgeField != null && rightEdgeField != null) { 
leftEdgeField.setAccessible(true); 
rightEdgeField.setAccessible(true); 
leftEdge = (EdgeEffectCompat) leftEdgeField.get(pager); 
rightEdge = (EdgeEffectCompat) rightEdgeField.get(pager); 
} 
} catch (Exception e) { 
e.printStackTrace(); 
} 
pager.setOnPageChangeListener(new OnPageChangeListener() { 
@Override 
public void onPageScrollStateChanged(int arg0) { 
if(rightEdge!=null&&!rightEdge.isFinished()){//到了最后一張并且還繼續(xù)拖動，出現(xiàn)藍色限制邊條了 
startActivity(new Intent(HelpActivity.this, MainActivity.class)); 
HelpActivity.this.finish(); 
} 
} 
@Override 
public void onPageSelected(int arg0) { 
} 
@Override 
public void onPageScrolled(int arg0, float arg1, int arg2) { 
} 
});

方法二：也是在OnPageChangeListener里判斷當前滾動的頁數(shù)是不是最后一頁

pager.setOnPageChangeListener(new OnPageChangeListener() { 
@Override 
public void onPageSelected(int arg0) { 
} 
@Override 
public void onPageScrolled(int arg0, float arg1, int arg2) { 
} 
@Override 
public void onPageScrollStateChanged(int arg0) { 
//判斷當前頁數(shù)是否==總頁數(shù) 
} 
});

在此小編推薦方法一，方法二需要判斷PageScrollStateChanged(int arg0)的滾動狀態(tài)，也可以實現(xiàn)一樣的效果

轉(zhuǎn)載高手ViewPager在拖拽到左邊和右邊的時候，禁止顯示黃色或者藍色的漸變圖片的解決方法（以備自己以后查閱）

package com.example.viewpagertest; 
import java.lang.reflect.Field; 
import java.util.ArrayList; 
import java.util.List; 
import android.app.Activity; 
import android.os.Bundle; 
import android.support.v4.view.PagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.support.v4.view.ViewPager.OnPageChangeListener; 
import android.support.v4.widget.EdgeEffectCompat; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ImageView; 
public class MainActivity extends Activity implements OnPageChangeListener { 
private ViewPager viewpager; 
private List<ImageView> views; 
private EdgeEffectCompat leftEdge; 
private EdgeEffectCompat rightEdge; 
private int[] ids = {R.drawable.iframe_4,R.drawable.iframe_5,R.drawable.iframe_6,R.drawable.iframe_7,R.drawable.iframe_8}; 
private MyAdapter adapter; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
initView(); 
} 
private void initView() { 
viewpager = (ViewPager) findViewById(R.id.viewpager); 
initViewPager(); 
initData(); 
} 
private void initData() { 
views = new ArrayList<ImageView>(); 
for(int i=0;i<ids.length;i++){ 
ImageView iv = new ImageView(this); 
iv.setImageResource(ids[i]); 
views.add(iv); 
} 
adapter = new MyAdapter(); 
viewpager.setAdapter(adapter); 
viewpager.setOnPageChangeListener(this); 
} 
class MyAdapter extends PagerAdapter{ 
@Override 
public int getCount() { 
return views.size(); 
} 
@Override 
public boolean isViewFromObject(View arg0, Object arg1) { 
return arg0==arg1; 
} 
@Override 
public void destroyItem(ViewGroup container, int position, Object object) { 
((ViewPager)container).removeView(views.get(position)); 
} 
@Override 
public Object instantiateItem(ViewGroup container, int position) { 
((ViewPager)container).addView(views.get(position)); 
return views.get(position); 
} 
} 
@Override 
public void onPageScrollStateChanged(int arg0) { 
} 
@Override 
public void onPageScrolled(int arg0, float arg1, int arg2) { 
if (leftEdge != null && rightEdge != null) { 
leftEdge.finish(); 
rightEdge.finish(); 
leftEdge.setSize(0, 0); 
rightEdge.setSize(0, 0); 
} 
} 
@Override 
public void onPageSelected(int arg0) { 
} 
private void initViewPager() { 
try { 
Field leftEdgeField = viewpager.getClass().getDeclaredField("mLeftEdge"); 
Field rightEdgeField = viewpager.getClass().getDeclaredField("mRightEdge"); 
if (leftEdgeField != null && rightEdgeField != null) { 
leftEdgeField.setAccessible(true); 
rightEdgeField.setAccessible(true); 
leftEdge = (EdgeEffectCompat) leftEdgeField.get(viewpager); 
rightEdge = (EdgeEffectCompat) rightEdgeField.get(viewpager); 
} 
} catch (Exception e) { 
e.printStackTrace(); 
} 
} 
}

以上所述是小編給大家介紹的Android新特性頁面之ViewPager拖拽到最后一頁再拖拽打開其他Activity(三種方法)，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對腳本之家網(wǎng)站的支持！

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