SwipeRefresh 各种实现上拉，下拉刷新

http://blog.youkuaiyun.com/imshuyuan/article/details/62041447

基于原生的SwipeRefreshLayout 做了封装处理

项目源码 
https://github.com/huangshuyuan/SwipeRefresh

此项目中包括三种：

• 1.原生SwipeRefreshLayout（上拉可通过滚动监听实现）

• 2.自定义支持上拉刷新的组件

• 3.自定义支持ViewPage的刷新组件VPSwipeRefreshLayout

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1.原生SwipeRefreshLayout（上拉可通过滚动监听实现）

除了OnRefreshListener接口外，SwipRefreshLayout中还有一些其他重要的方法，具体如下：

         1、setOnRefreshListener(SwipeRefreshLayout.OnRefreshListener listener):设置手势滑动监听器。

         2、setProgressBackgroundColor(int colorRes):设置进度圈的背景色。

         3、setColorSchemeResources(int… colorResIds):设置进度动画的颜色。

         4、setRefreshing(Boolean refreshing):设置组件的刷洗状态。

         5、setSize(int size):设置进度圈的大小，只有两个值：DEFAULT、LARGE

 ```

 布局，具体内容如下：
 ```
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:id="@+id/swipeLayout" >

    <ListView 
        android:id="@+id/mylist"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</android.support.v4.widget.SwipeRefreshLayout>
 
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Activity核心代码如下：

swipeRefreshLayout = (SwipeRefreshLayout)findViewById(R.id.swipeLayout);
  /*加载的渐变动画*/
        swipeRefreshLayout.setColorSchemeResources(R.color.swipe_color_1,
                R.color.swipe_color_2,
                R.color.swipe_color_3,
                R.color.swipe_color_4);
        swipeRefreshLayout.setSize(SwipeRefreshLayout.LARGE);;
        swipeRefreshLayout.setProgressBackgroundColor(R.color.swipe_background_color);
        //swipeRefreshLayout.setPadding(20, 20, 20, 20);
        //swipeRefreshLayout.setProgressViewOffset(true, 100, 200);
        //swipeRefreshLayout.setDistanceToTriggerSync(50);
        swipeRefreshLayout.setProgressViewEndTarget(true, 100);
        swipeRefreshLayout.setOnRefreshListener(new OnRefreshListener() {
            @Override
            public void onRefresh() {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        data.clear();
                        for(int i=0;i<20;i++){
                            data.add("SwipeRefreshLayout下拉刷新"+i);
                        }
                        try {
                            Thread.sleep(5000);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        mHandler.sendEmptyMessage(1);
                    }
                }).start();
            }
        });
    //handler
    private Handler mHandler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
            case 1:

                swipeRefreshLayout.setRefreshing(false);
                adapter.notifyDataSetChanged();
                //swipeRefreshLayout.setEnabled(false);
                break;
            default:
                break;
            }
        }
    };

 
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• 原生实现上拉效果

通过监听滚动事件，对listview添加底部的组件实现上拉

 implements AbsListView.OnScrollListener {···


 ···
  /**
         * 对listview添加底部的组件实现上拉
         */
        footerView = getLayoutInflater().inflate(R.layout.refresh_footview_layout, null);
        lv.addFooterView(footerView);
  /**
         * 设置滚动监听
         */
   lv.setOnScrollListener(this);

    /**
     * 重写滚动方法
     * @param view
     * @param scrollState
     */
    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        if (adapter.getCount() == visibleLastIndex && scrollState == SCROLL_STATE_IDLE) {
            Toast.makeText(this, "加载更多完成", Toast.LENGTH_SHORT).show();
            footerView.setVisibility(View.GONE);
            /*在此处加载更多数据*/
//            new LoadDataThread().start();
        }else {
            footerView.setVisibility(View.VISIBLE);
//            Toast.makeText(this, "加载更多...", Toast.LENGTH_SHORT).show();
        }

    }

 
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