http://blog.csdn.net/lvzishen123/article/details/52382687
最终代码为:
public abstract class BasePagerFragment extends Fragment {
protected AppCompatActivity mActivity;
protected boolean isViewInitiated; //控件是否初始化完成
protected boolean isVisibleToUser; //页面是否可见
protected boolean isDataInitiated; //数据是否加载
@Override
public void setUserVisibleHint(boolean isVisibleToUser) { //page 1等会此读数据 生命周期
super.setUserVisibleHint(isVisibleToUser);
this.isVisibleToUser = isVisibleToUser;
prepareFetchData(false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) { //page 0进入再此读数据
super.onActivityCreated(savedInstanceState);
isViewInitiated = true;
prepareFetchData(false);
}
public abstract void loadData();
protected void prepareFetchData(boolean forceUpdate) {
if (isVisibleToUser && isViewInitiated && (!isDataInitiated || forceUpdate)) {
loadData();
isDataInitiated = true;
}
}
}
所需要懒加载的fragment继承此fragment并在loaddata方法里加载数据即可。