SwipeToLoadLayout

为什么选择SwipeToLoadLayout？

首先看效果，框架中帮我们实现了几个主流的刷新效果，Twitter style，JD style，google style，Yalantis style，demo也下载下来看了，真不错，还支持各种自定义，自定义头部和尾部，头部还分classic，above，blow，scale四种类型，还有自动刷新的效果，体验也很流畅。

再看代码，刷新，加载各一个接口实现，头部和尾部也都是用接口实现，遵循设计模式的依赖倒转原则原则（针对抽象而不是针对具体编程），所以才能具备那么高可塑性，我们要做的就是实现接口里面的内容就可以轻松写一个刷新效果，就像使用baseAdapter一样，无论什么数据，什么样式，都可以轻松实现。

接着看功能，支持各种View和ViewGroup（ListView，ScrollView，RecyclerView，GridView，WebView，Linearlayout，RelativeLayout，FrameLayout，ImageView，TextView等）的刷新和加载，还支持自动刷新，手动刷新，自动加载，手动加载，禁止刷新，禁止加载等操作，完全满足需求。

最后，说的这么好，有没有经过测试呢？当然了，口说无凭，带大家实现一个。

通过SwipeToLoadLayout实现一个刷新加载的效果

1、如何集成

Step 1. Add the JitPack repository in your build.gradle at the end of repositories:

repositories { maven { url "https://jitpack.io" }}

Step 2. Add the dependency in the form

dependencies { compile 'com.github.aspsine:SwipeToLoadLayout:v1.0.0'}

2，开始自定义刷新效果

swipeToLoadLayout提供了一套接口，刷新的头部自定义一个View实现SwipeTrigger和SwipeRefreshTrigger就行了，刷新的尾部自定义一个View实现SwipeLoadMoreTrigger和SwipeTrigger，头部实现代码：

public class CustomRefreshHeadView extends TextView implements SwipeRefreshTrigger, SwipeTrigger { public CustomRefreshHeadView(Context context) { super(context); } public CustomRefreshHeadView(Context context, AttributeSet attrs) { super(context, attrs); } public CustomRefreshHeadView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } @Override public void onRefresh() { setText("正在拼命加载数据..."); } @Override public void onPRepare() { } @Override public void onSwipe(int i, boolean b) { setText("释放刷新"); } @Override public void onRelease() { } @Override public void complete() { setText("刷新成功"); } @Override public void onReset() { }}

xml中使用

注意，swipetoloadlayout中布局包裹的View id是指定的，不能乱改，否则找不到<item name="swipe_target" type="id" />刷新目标<item name="swipe_refresh_header" type="id" />刷新头部<item name="swipe_load_more_footer" type="id" />刷新尾部

<?xml version="1.0" encoding="utf-8"?><com.aspsine.swipetoloadlayout.SwipeToLoadLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/swipeToLoad" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.yyydjk.swipetorefreshdemo.MainActivity"> <com.yyydjk.swipetorefreshdemo.CustomRefreshHeadView android:id="@+id/swipe_refresh_header" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:padding="20dp" /> <TextView android:id="@+id/swipe_target" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/colorPrimary" android:gravity="center" android:text="Hello World!" /></com.aspsine.swipetoloadlayout.SwipeToLoadLayout>

代码中调用

CustomRefreshHeadView refreshHeadView = new CustomRefreshHeadView(this);refreshHeadView.setPadding(20,20,20,20);refreshHeadView.setGravity(Gravity.CENTER);refreshHeadView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));swipeToLoadLayout.setRefreshHeaderView(refreshHeadView);

就这么简单，看下演示效果，做的丑了点，以后有时间弄个精致点的

swipeToRefresh.gif

转自：http://www.jianshu.com/p/d69ae409a52c

好吧，让我们再来看个栗子：

Step 1. Create an Simple RefreshHeaderView

public class RefreshHeaderView extends TextView implements SwipeRefreshTrigger, SwipeTrigger {    public RefreshHeaderView(Context context) {        super(context);    }    public RefreshHeaderView(Context context, AttributeSet attrs) {        super(context, attrs);    }    @Override    public void onRefresh() {        setText("REFRESHING");    }    @Override    public void onPrepare() {        setText("");    }    @Override    public void onMove(int yScrolled, boolean isComplete, boolean automatic) {        if (!isComplete) {            if (yScrolled >= getHeight()) {                setText("RELEASE TO REFRESH");            } else {                setText("SWIPE TO REFRESH");            }        } else {            setText("REFRESH RETURNING");        }    }    @Override    public void onRelease() {    }    @Override    public void onComplete() {        setText("COMPLETE");    }    @Override    public void onReset() {        setText("");    }}
Step 2. Create an Simple LoadMoreFooterView
public class LoadMoreFooterView extends TextView implements SwipeTrigger, SwipeLoadMoreTrigger {    public LoadMoreFooterView(Context context) {        super(context);    }    public LoadMoreFooterView(Context context, AttributeSet attrs) {        super(context, attrs);    }    @Override    public void onLoadMore() {        setText("LOADING MORE");    }    @Override    public void onPrepare() {        setText("");    }    @Override    public void onMove(int yScrolled, boolean isComplete, boolean automatic) {        if (!isComplete) {            if (yScrolled <= -getHeight()) {                setText("RELEASE TO LOAD MORE");            } else {                setText("SWIPE TO LOAD MORE");            }        } else {            setText("LOAD MORE RETURNING");        }    }    @Override    public void onRelease() {        setText("LOADING MORE");    }    @Override    public void onComplete() {        setText("COMPLETE");    }    @Override    public void onReset() {        setText("");    }}
Step 3. Edit activity layout xml
<?xml version="1.0" encoding="utf-8"?><com.aspsine.swipetoloadlayout.SwipeToLoadLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/swipeToLoadLayout"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.aspsine.swipetoloadlayoutdemo.MainActivity">    <com.aspsine.swipetoloadlayoutdemo.RefreshHeaderView        android:id="@id/swipe_refresh_header"        android:layout_width="match_parent"        android:gravity="center"        android:layout_height="100dp" />    <ListView        android:id="@id/swipe_target"        android:layout_width="match_parent"        android:layout_height="match_parent" />    <com.aspsine.swipetoloadlayoutdemo.LoadMoreFooterView        android:id="@id/swipe_load_more_footer"        android:layout_width="match_parent"        android:gravity="center"        android:layout_height="100dp" /></com.aspsine.swipetoloadlayout.SwipeToLoadLayout>
Note:
refresh header view android:id="@id/swipe_refresh_header"target view android:id="@id/swipe_target"load more footer view android:id="@id/swipe_load_more_footer"
Step 4. Write java code
public class MainActivity extends AppCompatActivity implements OnRefreshListener, OnLoadMoreListener {    SwipeToLoadLayout swipeToLoadLayout;    ArrayAdapter<String> mAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        swipeToLoadLayout = (SwipeToLoadLayout) findViewById(R.id.swipeToLoadLayout);        ListView listView = (ListView) findViewById(R.id.swipe_target);        swipeToLoadLayout.setOnRefreshListener(this);        swipeToLoadLayout.setOnLoadMoreListener(this);        mAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_expandable_list_item_1);        listView.setAdapter(mAdapter);        autoRefresh();    }    @Override    public void onRefresh() {        swipeToLoadLayout.postDelayed(new Runnable() {            @Override            public void run() {                swipeToLoadLayout.setRefreshing(false);                mAdapter.add("REFRESH:/n" + new Date());            }        }, 2000);    }    @Override    public void onLoadMore() {        swipeToLoadLayout.postDelayed(new Runnable() {            @Override            public void run() {                swipeToLoadLayout.setLoadingMore(false);                mAdapter.add("LOAD MORE:/n" + new Date());            }        }, 2000);    }    private void autoRefresh() {        swipeToLoadLayout.post(new Runnable() {            @Override            public void run() {                swipeToLoadLayout.setRefreshing(true);            }        });    }}demo地址：https://github.com/Aspsine/SwipeToLoadLayout.git哈哈，这下应该没问题啦！参考文档：https://github.com/Aspsine/SwipeToLoadLayout/wiki/Quick-Setup