懒加载Fragment

import android.os.Bundle;  
import android.support.v4.app.Fragment;  
import android.view.LayoutInflater;  
import android.view.View;  
import android.view.ViewGroup;  
  
public class MyFragment extends Fragment {  
    private boolean isInit; // 是否可以开始加载数据  
  
    @Override  
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {  
        isInit = true;  
        return inflater.inflate(R.layout.fragment_my, container, false);  
    }  
  
    @Override  
    public void onViewCreated(View view, Bundle savedInstanceState) {  
        super.onViewCreated(view, savedInstanceState);  
        /* 初始化控件 */  
    }  
  
    @Override  
    public void onResume() {  
        super.onResume();  
        // 判断当前fragment是否显示  
        if (getUserVisibleHint()) {  
            showData();  
        }  
    }  
  
    @Override  
    public void setUserVisibleHint(boolean isVisibleToUser) {  
        super.setUserVisibleHint(isVisibleToUser);  
        // 每次切换fragment时调用的方法  
        if (isVisibleToUser) {  
            showData();  
        }  
    }  
  
    /** 
     * 初始化数据 
     * @author yubin 
     * @date 2014-1-16 
     */  
    private void showData() {  
        if (isInit) {  
            isInit = false;//加载数据完成  
            // 加载各种数据  
        }  
    }  
}