Android 碎片中的不同碎片PageRadapter

我的主要问题是，为我实现的FragmentPagerAdapter提供不同片段的正确方法是什么。例如，我目前正在这样做：

@Override
public int getCount() {
    return(3);
}

@Override
public Fragment getItem(int position) {
    switch (position) {
        case 0:
            return Fragment1.newInstance(position);
        case 1:
            return Fragment2.newInstance(position);
        case 2:
            return Fragment3.newInstance(position);
    }
    return Fragment1.newInstance(position);  
}

这是正确的吗？谢谢。

请这边试试

@Override
public Fragment getItem(int position) {
    switch (position) {
        case 0:
            return Fragment1.newInstance(position);
        case 1:
            return Fragment2.newInstance(position);
        case 2:
            return Fragment3.newInstance(position);
    }
    return null;  // <-----  I think you have to change here...
}

请这样试试

@Override
public Fragment getItem(int position) {
    switch (position) {
        case 0:
            return Fragment1.newInstance(position);
        case 1:
            return Fragment2.newInstance(position);
        case 2:
            return Fragment3.newInstance(position);
    }
    return null;  // <-----  I think you have to change here...
}