Google原生下拉刷新组件SwipeRefreshLayout

来源：互联网发布：从零开始学淘宝美工编辑：程序博客网时间：2024/06/14 13:02

SwipeRefrshLayout是Google官方更新的一个Widget,可以实现下拉刷新的效果。该控件集成自ViewGroup在support-v4兼容包下，不过我们需要升级supportlibrary的版本到19.1以上。基本使用的方法如下:

setOnRefreshListener(OnRefreshListener):添加下拉刷新监听器
setRefreshing(boolean):显示或者隐藏刷新进度条
isRefreshing():检查是否处于刷新状态

setColorSchemeResources():设置进度条的颜色主题，最多设置四种，以前的setColorScheme()方法已经弃用了。

实例一：

public class SwipeActivity extends AppCompatActivity {    @ViewInject(value = R.id.swipe_lv)    private ListView mLv;    @ViewInject(value = R.id.swipeLayoout)    private SwipeRefreshLayout swipeLayout;    private LinkedList<String> list ;    private ArrayAdapter<String>adapter;    Handler handler = new Handler(){        @Override        public void handleMessage(Message msg) {            adapter.notifyDataSetChanged();            swipeLayout.setRefreshing(false);        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_swipe);        x.view().inject(this);        list = new LinkedList<>(Arrays.asList("java","php","oc","c#","c++","ruby","html5"));        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,list);        mLv.setAdapter(adapter);        swipeLayout.setColorSchemeColors(Color.RED,Color.BLUE,Color.GREEN,Color.YELLOW);        swipeLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {            @Override            public void onRefresh() {                String[]datas = {"ios","vr","ar","javascrip","ui","android"};                for (int i = datas.length-1; i >=0; i--) {                    list.addFirst(datas[i]);                }                handler.sendEmptyMessageDelayed(1,5000);            }        });    }}

<android.support.v4.widget.SwipeRefreshLayout        android:id="@+id/swipeLayoout"        android:layout_height="match_parent"        android:layout_width="match_parent">        <ListView            android:id="@+id/swipe_lv"            android:layout_width="match_parent"            android:layout_height="match_parent"></ListView>    </android.support.v4.widget.SwipeRefreshLayout>

效果：

实例二：

public class RefreshLayout extends SwipeRefreshLayout implements AbsListView.OnScrollListener{    private ListView lv;    //声明内部包含的listview    private View footerView;   //判断是否正在加载当中    private boolean isLoading = false;    boolean isLast = false;    private OnLoadingListener listener;    //设置加载状态的方法    public void setLoading(boolean isLoading){        this.isLoading = isLoading;        if (isLoading){            lv.addFooterView(footerView);        }else {            lv.removeFooterView(footerView);        }    }    public void setOnLoadingListener(OnLoadingListener listener){        this.listener = listener;    }    public RefreshLayout(Context context) {        super(context);        footerView = LayoutInflater.from(context).inflate(R.layout.lv_footer,null);    }    public RefreshLayout(Context context, AttributeSet attrs) {        super(context, attrs);        footerView = LayoutInflater.from(context).inflate(R.layout.lv_footer,null);    }    /**     * 作用：排列布局当中的子视图  ，能够拿到子视图控件     * */    @Override    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {        super.onLayout(changed, left, top, right, bottom);        //获取容器当中子视图的数量        int count = getChildCount();        if (count>0) {  //布局当中是由内容的            for (int i = 0; i < count; i++) {                View childView = getChildAt(i);                if (childView instanceof  ListView){                    lv = (ListView) childView;                    lv.setOnScrollListener(this);                }            }        }    }    @Override    public void onScrollStateChanged(AbsListView view, int scrollState) {        if (isLast & scrollState == SCROLL_STATE_IDLE && !isLoading){            setLoading(true);            listener.onLoad();        }    }    @Override    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {        //判断是否已经到底部了        isLast = firstVisibleItem+visibleItemCount==totalItemCount;    }    //定义一个上啦加载的接口    public interface  OnLoadingListener{        public void onLoad();    }}

public class RefreshActivity extends AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener,RefreshLayout.OnLoadingListener{    @ViewInject(value = R.id.refresh_layout)    private RefreshLayout refreshLayout;    @ViewInject(value = R.id.refresh_lv)    private ListView lv;    private List<String>mDatas;    private ArrayAdapter<String>adapter;    Handler handler = new Handler();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_refresh);        x.view().inject(this);        mDatas = new ArrayList<>();        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,mDatas);        lv.setAdapter(adapter);        initData();        //设置上啦加载和下拉刷新的监听        refreshLayout.setOnRefreshListener(this);        refreshLayout.setOnLoadingListener(this);        refreshLayout.setColorSchemeColors(Color.YELLOW,Color.RED);    }    private void initData(){        int size = mDatas.size();        for (int i = 0; i < 20; i++) {            mDatas.add(size+i+"");        }        adapter.notifyDataSetChanged();    }    //上啦加载的方法    @Override    public void onLoad() {        handler.postDelayed(new Runnable() {            @Override            public void run() {                initData();                //设置加载状态                refreshLayout.setLoading(false);            }        },5000);    }    @Override    public void onRefresh() {        handler.postDelayed(new Runnable() {            @Override            public void run() {                mDatas.clear();                initData();                //设置结束刷新                refreshLayout.setRefreshing(false);            }        },3000);    }}

<com.xinyuliu.pulltorefresh.customview.RefreshLayout        android:id="@+id/refresh_layout"        android:layout_width="match_parent"        android:layout_height="match_parent">        <ListView            android:id="@+id/refresh_lv"            android:layout_width="match_parent"            android:layout_height="match_parent">        </ListView>    </com.xinyuliu.pulltorefresh.customview.RefreshLayout>

效果：

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