<android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v4.view.ViewPager>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/holo_red_light">
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/holo_blue_bright">
</LinearLayout>
public class Adapter extends PagerAdapter{
private List<View> views;
public Adapter(List<View> views){
this.views = views;
}
@Override
public int getCount() {
return views.size();
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView(views.get(arg1));
}
@Override
public void finishUpdate(View arg0) {
}
@Override
public Object instantiateItem(View arg0, int arg1) {
((ViewPager) arg0).addView(views.get(arg1), 0);
return views.get(arg1);
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == (arg1);
// return false;
}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {
}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void startUpdate(View arg0) {
}
}
private ViewPager mpager;
private List<View> myview = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mpager = (ViewPager) findViewById(R.id.view_pager);
LayoutInflater mInflater = getLayoutInflater();
View [] pagers = {mInflater.inflate(R.layout.item_one ,null),
mInflater.inflate(R.layout.item_two , null)};
for(int i = 0; i < pagers.length ; i++) {
myview.add(pagers[i]);
}
Adapter ad = new Adapter(myview);
mpager.setAdapter(ad);
mpager.setCurrentItem(0);
}
final View [] pagers = {mInflater.inflate(R.layout.item_one ,null),
mInflater.inflate(R.layout.item_two , null),
mInflater.inflate(R.layout.item_three,null)};
for(int i = 0; i < pagers.length ; i++) {
myview.add(pagers[i]);
}
myview.add(0,mInflater.inflate(R.layout.item_three , null));
myview.add(4, mInflater.inflate(R.layout.item_one, null));
mpager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
int index = position;
if(index == 0){
//注意这里pagers数组,不是myviews数组
index = pagers.length;
}else if(position == pagers.length + 1){
index = 1;
}
if(position != index){
mpager.setCurrentItem(index, false);
}
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
public Object instantiateItem(View arg0, int arg1) {
if(arg1 == 0){
((ViewPager) arg0).removeView(views.get(myview.size() - 3));
((ViewPager) arg0).addView(views.get(myview.size() - 3), 0);
}else if(arg1 == myview.size() - 1){
((ViewPager) arg0).removeView(views.get(0));
((ViewPager) arg0).addView(views.get(0), 0);
}else{
((ViewPager) arg0).addView(views.get(arg1), 0);
}
return views.get(arg1);
}
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