您好Chlebta您需要设置pager.setOffscreenPageLimit(5);。在片段之间滑动时，片段可能会被破坏。这就是为什么你得到空的原因。
pager.setOnPagechangelistener(new OnPagechangelistener() {
@Override
public void onPageSelected(int arg0) {
// Now here you get your fragment object.
// To get the Fragment Object you need to store them in an ArrayList in your FragPagerAdapter class.
// create a method `getMyFraggment ` which return your Fragment from Arraylist.
// Now create a method in your each Fragment which return your EditText values. Here you can use HashMap to store the values.
// Here you use switch cases to get your Fragment Object I just wrote 1 here
MyFragment f = ((FragPagerAdapter)pager.getAdapter()).getMyFraggment(arg0);
HashMap <String, String> hashMap = f.getValuesFromFragment();
myValues.putAll(hashMap); // myValues is global hashmap in your Activity.
// Now you get All values in your Global HashMap. But remember here you can get duplicate values if user swipe a fragment more than 1 time. You should do a logic here to remove duplicate values.
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
});
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