PullToRefresh自动刷新

.java

    @Override
    public void onResume() {
        super.onResume();
        //自动刷新值需要在onResume方法中延迟执行 mPulltoRefreshView.setRefreshing(true)
        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                mGridView.setRefreshing(true);
                //异步执行加载数据任务
                //加载数据成功后，必须调用 mPullToRefreshView.onRefreshComplete()
            }
        }, 500);
    }